Artículos de revistas: "Insecticidal Activities"

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Yang, Shuai, Hongxiang Peng, Jiahong Tang, Shuting Fan, Chen Zhao, Hanhong Xu y Guangkai Yao. "Discovery of Novel N-Pyridylpyrazole Thiazole Derivatives as Insecticide Leads". Agronomy 12, n.º 10 (11 de octubre de 2022): 2472. http://dx.doi.org/10.3390/agronomy12102472.

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To develop effective insecticides against Lepidoptera pests, 25 novel N-pyridylpyrazole derivatives containing thiazole moiety were designed and synthesized based on the intermediate derivatization method (IDM). The insecticidal activities of these target compounds against Plutella xylostella (P. xylostella), Spodoptera exigua (S. exigua), and Spodoptera frugiperda (S. frugiperda) were evaluated. Bioassays indicated that compound 7g−7j exhibited good insecticidal activities. Compound 7g showed especially excellent insecticidal activities against P. xylostella, S. exigua, and S. frugiperda with LC50 values of 5.32 mg/L, 6.75 mg/L, and 7.64 mg/L, respectively, which were adequate for that of commercial insecticide indoxacarb. A preliminary structure-activity relationship analysis showed that the insecticidal activities of thiazole amides were better than that of thiazole esters, and the amides with electron-withdrawing groups on the benzene ring were better than the ones with electron-donating groups. This work provides important information for designing novel N-pyridylpyrazole thiazole candidate compounds and suggests that the 7g is a promising insecticide lead for further studies.

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El-Gaby, Mohamed S. A., Moustafa M. S. Bakry, Modather F. Hussein, Faraghally A. Faraghally, Abden M. Khalil, Mohamed A. Gad y Ali M. Drar. "Insecticidal efficacy and structure activity relationship study of some synthesized cyano-benzylidene and bisbenzylidene derivatives against Aphis nerii". Current Chemistry Letters 12, n.º 3 (2023): 529–36. http://dx.doi.org/10.5267/j.ccl.2023.3.003.

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In this study, seven cyano-benzylidene and bisbenzylidene derivatives were designed and synthesized. All synthesized compounds were evaluated to determine their insecticidal activities as potential insecticides against nymphs and adults of Aphis nerii. These efforts led to the discovery of compounds 3a-d, 5, 7 and 10 with potent insecticidal activity (LC50 range from 0.0141 to 3.4351ppm). Compound 5 exhibited the highest insecticidal potency with 0.0141ppm. In addition, it indicated that compound 3b is less toxic than benzylidene and other precursors. Therefore, our results suggest that compound 5 has strong potential as a candidate component for developing a novel eco-friendly insecticide for control Aphids.

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3

Li, Li Xiu, Ling Yan Ge, Ting Xue y Xi Hong Li. "Insecticidal Effects of the Insecticide Based on Porous Starch and Cinnamon Oil against Sitophilus zeamais". Advanced Materials Research 160-162 (noviembre de 2010): 579–84. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.579.

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We investigated that the bioefficacies of cinnamon oil and insecticide based on the mixture of porous starch and cinnamon oil. They were evaluated for their insecticidal activities and their mortality on adults of Sitophilus zeamais. Fumigant toxicity assayed by hanging in glass jars showed that these chemicals caused significant mortality of the test insect. Cinnamon oil evoked high repellent action and high fumigant toxicity (LD50 = 0.030μL/cm3) against adults of Sitophilus zeamais. The two concentrations of the new insecticide 0.030μL/cm3 (LD50) and 0.040μL/cm3 (the highest) lose their insecticidal activity after a minimum of 144h and 168h, respectively. These results suggest that cinnamon oil starch powder is the most effective insecticide, and could increase its efficacy for use as an alternative to synthetic insecticides.

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4

Zhang, Jiwen, Zhaonong Hu, Hua Yang y Wenjun Wu. "Synthesis and Insecticidal Activities of New Ether-Derivatives of Celangulin-V". Natural Product Communications 5, n.º 6 (junio de 2010): 1934578X1000500. http://dx.doi.org/10.1177/1934578x1000500602.

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In order to find new biorational pesticides, eight new 6-substituted ether derivatives of Celangulin-V were synthesized. The structures were confirmed by IR, 1H NMR and 13C NMR spectroscopic and HRMS analyses. The insecticidal activities of these compounds were tested against third-instar larvae of Mythimna separata. Four derivatives (b, c, f, g) showed higher insecticidal activities than Celangulin-V, with KD50 values of 135.9, 101.33, 169.0 and 219.2 μg.g-1, respectively. However, two compounds (a, d) showed lower insecticidal activities and two (e, h) no activity. The results suggest that C-6 substitutions in these compounds are very important for their insecticidal activities. The insecticidal activities of the derivatives with two or three carbon substitutions at C-6 are higher than that of Celangulin-V showing that this compound has the potential to be a lead structure for semi-synthetic, green insecticides.

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Khandelwal, Sanskrati, Prachi Maheshwari, Vikas Jain y Suresh Chandra Mahajan. "Formulation and Evaluation of Herbal Liquid Insecticide". Journal of Drug Delivery and Therapeutics 13, n.º 3 (15 de marzo de 2023): 43–46. http://dx.doi.org/10.22270/jddt.v13i3.5755.

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Extensive usage of commercially available synthetic pesticides against phytophagous insects has resulted in their bio-accumulation in the environment, leading to a rise in resistance and a decrease in soil biodiversity over time. In addition, 90% of the sprayed pesticides penetrate the different natural resources via runoff, exposing farmers and consumers of agricultural products to serious health risks. As a result, increasing emphasis has been placed on the creation of environmentally benign pesticides/insecticides that would enable an effective pest management system and minimise chronic exposures that contribute to illnesses. The utilization of the herbal active compounds with insecticidal activities is one such technique. Hence the aim of this study was to develop herbal insecticide formulations from extracts of leaves of Azadirachta Indica, Datura Stramonium, Cascabela Thevetia and seeds of Annona Squamosa. Insecticidal efficacy of developed formulations was tested in-vitro against ballworm larvae. The study unveiled its significance in developing herbal insecticidal formulations as an alternative to harmful synthetic chemical insecticides and a step forward towards development of a promising eco-friendly technology in crop protection. Keywords: Insecticides, Biopesticide, Azadirachta indica, Datura Stramonium, Annona Squamosa, Cascabela Thevetia.

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Li, L., X. Song, Z. Yin, R. Jia y Y. Zou. "Insecticidal activities and mechanism of extracts from neem leaves against Oxya chinensis". Arquivo Brasileiro de Medicina Veterinária e Zootecnia 71, n.º 1 (febrero de 2019): 1–10. http://dx.doi.org/10.1590/1678-4162-8958.

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ABSTRACT In this study, neem leaves were successively extracted with petroleum ether, 95% ethanol and water and the insecticidal activities of these extracts against Oxya chinensis larvae were measured. The results showed that 95% ethanol extract gave the highest extraction yield and insecticidal activity, and it was further extracted with five different solvents. The petroleum ether extract from the 95% ethanol extract possessed the highest insecticidal activity with median lethal concentration values ranging from 14.93 to 55.66mg/mL. The gas chromatography-mass spectrometer analysis showed that the petroleum ether extract mainly composed of alkanes, olefin, esters and amide. The pathological examination revealed that the prominent lesions, including reduced regenerative cells in midgut and swelled and degenerated cylindrical cells, were observed in the 5th instar Oxya chinensis after treatment. The ultrastructural features showed that the cylindrical cells, microvilli and mitochondria were seriously damaged. These results suggested that the petroleum ether extract from neem leaves had potent insecticidal activity and could be a candidate insecticide.

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7

Zhang, Jiwen, Lihui Cui, Longbo Li, Zhan Hu, Qianliang Zhang, Zhaonong Hu y Wenjun Wu. "Synthesis and Insecticidal Activities of Novel Nitrogenous Derivatives of Celangulin-V". Natural Product Communications 9, n.º 6 (junio de 2014): 1934578X1400900. http://dx.doi.org/10.1177/1934578x1400900603.

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In order to develop new biorational pesticides and clarify the potential structural factors needed for the biological activity of celangulin-V analogues, thirty novel nitrogenous derivatives were designed and synthesized. The single crystal structure of celangulin-V is reported for the first time and provides a more accurate structure than that previously reported. The structures of all the new derivatives were confirmed by either NMR or ESI-MSn analysis. Insecticidal activities of these compounds were tested against the third-instar larvae of Mythimna separata. One derivative (1–6) showed higher insecticidal activity than celangulin-V, with a KD50 of 231.2 μg.g–1, while two compounds (2–13 and 2–14) exhibited lower insecticidal activities; the others revealed no activity at a concentration of 20 mg mL−1. The results support the view that celangulin-V has the potential to be a lead structure of semi-synthetic green insecticides.

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8

Wang, Wenda, Haihuan Su, Huangyong Li y Xiufang Cao. "Tetrafluorobenzyl Alcohol-Oriented Novel (S)-Enantiomeric Esters: Synthesis and Structure-Activity Relationship". Current Bioactive Compounds 15, n.º 1 (6 de febrero de 2019): 98–102. http://dx.doi.org/10.2174/1573407213666170221160947.

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Background: Using constantly and widely chemistry insecticides has resulted in a selection burden and favored tolerance development in various insect species. Particularly, pyrethroids are the only one which can be used for net impregnation either ITNs or LLIN as yet, however, the excessive use of pyrethroids has led to many cases of insect resistance in worldwide. Therefore, it is urgent to develop novel insecticides fighting against this sort of resistance. Methods: Based on the preliminary studies, we explored a straightforward highly stereoselective method to achieve the novel chiral ester derivatives by using Oppolzer’s 10,2-camphorsultam as chiral controlling reagent. Results: A series of tetrafluorobenzyl alcohol oriented (S)-enantiomeric esters were designed and synthesized by the asymmetric synthesis. All the compounds exhibited moderate yields, and the original synthesized compounds have been evaluated for their potential insecticidal activity against Plutella xylostella compared with those of fenvalerate and D-trans-phenothrin, and some compounds presented excellent insecticidal activities. Conclusion: The bioassay illustrated that some of the compounds exhibit obviously insecticidal activities against Plutella xylostella, especially, the insecticidal activity of compound 5i was as good as commercial fenvalerate and D-trans-phenothrin, which can be used as a lead compound for further optimization.

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9

Zhang, Jiwen, Zhan Hu, Shengkun Li, Shuding Yang y Wenjun Wu. "Synthesis and Insecticidal Activities of Novel Derivatives of 1β,4α,6α,9α-Tetrahydroxy-2β,12-epoxymethano-β-dihydroagarofuran". Natural Product Communications 8, n.º 6 (junio de 2013): 1934578X1300800. http://dx.doi.org/10.1177/1934578x1300800617.

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In order to develop novel biorational pesticides, twelve new ether derivatives of 1β,4α,6α,9α-tetrahydroxy-2β,12-epoxymethano-β-dihydroagarofuran (3) were synthesized. The structure of the important intermediate 3 was confirmed by X-ray crystallography, and the new derivatives (3.1–3.12) were elucidated by IR, 1H NMR, 13 C NMR and 2D NMR spectroscopic and ESI-MS analysis. Insecticidal activities of these derivatives were tested against the third-instar larvae of Mythimna separata. Though most of the derivatives (3.1–3.4, 3.6, 3.8, 3.9–3.12) revealed no obvious activities at the concentration of 10 mg/mL –1, two compounds 3.5 and 3.7, with KD50 values of 12.9 (μg/g-1 and 7.8 μg/g –1, respectively, showed much higher insecticidal activities than celangulin-V, with a KD50 of 321.4 μg·g–1, the main insecticidal component from the root bark of Chinese bittersweet, Celastrus angulatus Max. The results showed that β-dihydroagarofuran has the potential to be a lead structure for semi-synthetic green insecticides.

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10

D Incao, Marianna P., Neiva Knaak y Lidia M. Fiuza. "PHYTOCHEMICALS TAKEN FROM PLANTS WITH POTENTIAL IN MANAGEMENT OF SPODOPTERA FRUGIPERDA (LEPIDOPTERA: NOCTUIDAE)". Journal of Biopesticides 06, n.º 02 (1 de diciembre de 2013): 182–92. http://dx.doi.org/10.57182/jbiopestic.6.2.182-192.

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ABSTRACT In agriculture, there is a constant search for natural products with biological activities that minimize the environmental impact of various pesticides used such as insecticides. The chemical constituents present in plants have these activities and show promise in fighting pests in agriculture. An approach to the selection of new insecticides that fulfill the requirements of safety, efficacy and selectivity, can be through the study of defense mechanisms of plants. Recent studies have shown the potential insecticide substances and extracts isolated from plants against various insect pests that cause serious damage to crops or stored grain. These active ingredients are distributed by different plant organs and involved in secondary metabolism, are divided into three major groups: terpenes, phenols and nitrogenous compounds. Thus, this review aims to give an overview of the active ingredients obtained from plant extracts with potential insecticidal to Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae).

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11

Jayaram, C. S., Nandita Chauhan, Shudh Kirti Dolma y S. G. Eswara Reddy. "Chemical Composition and Insecticidal Activities of Essential Oils against the Pulse Beetle". Molecules 27, n.º 2 (17 de enero de 2022): 568. http://dx.doi.org/10.3390/molecules27020568.

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Pulse beetles, Callosobruchus chinensis and Callosobruchus maculatus, are essential pests of cowpea, gram, soybean and pulses. Application of synthetic insecticides against the pulse beetle has led to insect resistance; insecticide residues on grains affect human health and the environment. Essential oils (EOs) are the best alternatives to synthetics due to their safety to the environment and health. The main objective of the investigation was to study the chemical composition and insecticidal activities of EOs, their combinations and compounds against the pulse beetle under laboratory. Neo-isomenthol, carvone and β-ocimene are the significant components of tested oils using GC-MS. Mentha spicata showed promising fumigant toxicity against C. chinensis (LC50 = 0.94 µL/mL) and was followed by M. piperita (LC50 = 0.98 µL/mL), whereas M. piperita (LC50 = 0.92 µL/mL) against C. maculatus. A combination of Tagetes minuta + M. piperita showed more toxicity against C. chinensis after 48 h (LC50 = 0.87 µL/mL) than T. minuta + M. spicata (LC50 = 1.07 µL/mL). L-Carvone showed fumigant toxicity against C. chinensis after 48 h (LC50 = 1.19 µL/mL). Binary mixtures of T. minuta +M. piperita and M. spicata showed promising toxicity and synergistic activity. EOs also exhibited repellence and ovipositional inhibition. The application of M. piperita can be recommended for the control of the pulse beetle.

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12

Liu, Congmin, Panyuan Zheng, Hongmei Wang, Yan Wei, Chuanping Wang y Shuanghong Hao. "Design and Synthesis of Scopoletin Sulfonate Derivatives as Potential Insecticidal Agents". Molecules 28, n.º 2 (5 de enero de 2023): 530. http://dx.doi.org/10.3390/molecules28020530.

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(1) Background: Scopoletin and scoparone, two naturally occurring coumarins, have garnered considerable attention and have been introduced to the market in China due to their high insecticidal efficacy and low toxicity. To investigate the structure–activity relationship of these coumarins, a series of scopoletin derivatives with aryl sulfate at C7 and different substitutes at C3 were designed and synthesized, and their insecticidal activity was studied. (2) Methods: A total of 28 new scopoletin derivatives were designed and synthesized. Most target compounds exhibited moderate insecticidal activity against the phytophagous mite Tetranychus cinnabarinus and the brine shrimp Artemia salina. (3) Results: Among these compounds, compounds 5a and 5j possessed the best insecticidal activities against T. cinnabarinus, with LC50 values of 57.0 and 20.0 μg/mL, respectively, whereas that of the control drug was 15.0 μg/mL. Compound 4j exhibited selective insecticidal activities against A. salina, with an LC50 value of 9.36 μg/mL, whereas its LC50 value against T. cinnabarinus was 93.0 μg/mL. The enzymatic inhibitory activity on acetylcholinesterase (AChE) showed a consistent tendency with the insecticidal activity. Further molecular docking analyses predicted the binding conformations of these compounds, which showed a good correlation between the insecticidal activity and the binding scores. (4) Conclusions: In general, a decreased electron cloud density of the Δ3,4 olefinic bond is beneficial for improving the insecticidal activity against both T. cinnabarinus and A. salina. In addition, naphthyl or benzene groups with a sulfate ester at the C7 position could further improve the insecticidal activity against A. salina. AChE was implied to be a site of action for potential insecticidal activity. The results provide insight into the rational design of a new generation of effective coumarin insecticides.

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13

Flores-Macías, Antonio, Miguel Alejandro Flores-Sánchez, Luis Ricardo León-Herrera, Víctor Manuel Mondragón-Olguín, Carlos Eduardo Zavala-Gómez, Ana Delia Tapia-Pérez, Juan Campos-Guillén et al. "Activity of Chloroformic Extract from Salvia connivens (Lamiales: Lamiaceae) and Its Principal Compounds against Spodoptera frugiperda (Lepidoptera: Noctuidae)". Applied Sciences 11, n.º 24 (12 de diciembre de 2021): 11813. http://dx.doi.org/10.3390/app112411813.

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Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) is one of the most damaging pests in maize crops. In order to manage it, synthetic insecticides such as diamides, neonicotinoids, and pyrethroids are used, but they present a risk for humans and the environment. Investigations of safer alternatives include the use of natural extracts. Thus, this research evaluated the effects of chloroform extract (CHCl3Sc) (5000, 4000, 2000, 1000, and 500 ppm) on aerial parts of Salvia connivens and of nonanal and pyrocatechol (1000, 600, 400, and 80 ppm) on S. frugiperda mortality, duration of the larva and pupae phases, and pupae weight after 24 h. The second instars of S. frugiperda larvae were fed an artificial diet incorporating the extract and compounds. The CHCl3Sc had insecticidal activity against S. frugiperda, showing an LC50 of 1504 ppm. Insectistatic activity began at 1000 ppm, increasing pupal and larval duration in 7.6 and 1.4 days, respectively. Pyrocatechol and nonanal were found in this extract. The first did not have any significant difference in larval or pupal mortalities. On the other hand, insectistatic activity was shown at 500 ppm, increasing the larval duration by 1.7 days compared with the control. In the case of nonanal, the insecticide activity was LC50 of 200 ppm, and insectistatic activity started at 80 ppm, increasing larval duration by 3.2 days compared with the control and reducing pupal weight by 3.4%. The results show that chloroformic extract had insecticidal and insectistatic activities against S. frugiperda; nonanal was an aldehyde compound present in this extract, which confers insecticidal and insectistatic activities against this pest.

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14

Changbunjong, Tanasak, Sookruetai Boonmasawai, Sivapong Sungpradit, Thekhawet Weluwanarak y Arpron Leesombun. "Contact and Fumigant Activities of Citrus aurantium Essential Oil against the Stable Fly Stomoxys calcitrans (Diptera: Muscidae)". Plants 11, n.º 9 (21 de abril de 2022): 1122. http://dx.doi.org/10.3390/plants11091122.

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The stable fly, Stomoxys calcitrans (L.), is a cosmopolitan hematophagous fly of medical and veterinary importance. It is widely considered a major livestock pest that can cause significant economic losses. This study aimed to evaluate the insecticidal activity of Citrus aurantium (L.) essential oil against S. calcitrans based on contact and fumigant toxicity tests. Chemical analysis by gas chromatography-mass spectrometry of the essential oil showed the dominance (93.79%) of limonene in the total essential oil composition. Furthermore, the insecticidal test results showed that the mortality of flies increased with concentration and time within 24 h of exposure. In the contact toxicity test, the median lethal dose was 105.88 µg/fly, while the 90% lethal dose was 499.25 µg/fly. As for the fumigant toxicity test, the median lethal concentration was 13.06 mg/L air, and the 90% lethal concentration was 43.13 mg/L air. These results indicate that C. aurantium essential oil exhibits insecticidal activity against S. calcitrans. Therefore, it can be used as an alternative to synthetic insecticides for achieving stable fly control.

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15

Wu, Jingwen, Shuaihui Dang, Yan Zhang y Sha Zhou. "Novel Meta-Diamide Compounds Containing Sulfide Derivatives Were Designed and Synthesized as Potential Pesticides". Molecules 29, n.º 6 (17 de marzo de 2024): 1337. http://dx.doi.org/10.3390/molecules29061337.

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The meta-diamide (m-diamide) insecticide, Broflanilide, was characterized by its high efficiency, low toxicity and lack of cross-resistance with traditional GABA receptors. In accordance with the principles of drug molecular design, easily derivable sulfur with diverse bioactivities was introduced while leading with the parent Broflanilide. Twelve novel m-diamide target compounds containing sulfide derivatives were synthesized through exploration guided by the literature. Their structures were confirmed by melting points, 1H NMR, 13C NMR and HRMS. Insecticidal activity assessments revealed that most target compounds A–D exhibited 100% lethality against Plutella xylostella (P. xylostella) and Aphis craccivora Koch (A. craccivora) at 500 mg·L−1. Notably, for P. xylostella, compounds C-2, C-3, C-4 and D-2 demonstrated 60.00–100.00% insecticidal activity even at a concentration as low as 0.625 mg·L−1. As determined by structure–activity relationship (SAR) analysis, compounds with R1 = CH3 and R2 = Br (B-1, C-2 and D-2) and sulfoxide compound C-3 contained 100.00% lethality against A. craccivora at 500 mg·L−1, surpassing the lethality when leading with the parent Broflanilide in terms of efficacy. Consequently, it can be inferred that the sulfoxide compound (C-3) requires further investigation as a potential active molecule for new insecticides. These explorations provide valuable references for future research on the synthesis and insecticidal activities of sulfide-containing m-diamide compounds.

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Khan, Hafiz Azhar Ali. "An impact assessment of insecticides application on the non-targeted mosquito Aedes albopictus (Skuse) in Punjab rice fields, Pakistan". PeerJ 10 (11 de julio de 2022): e13697. http://dx.doi.org/10.7717/peerj.13697.

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Insecticidal control of insect pests of rice crop may influence the environment and nontarget species in rice fields. Aedes albopictus, one of the most common nontarget species present in rice fields, received lethal and sublethal exposures to insecticides used in rice cultivated fields. The present work explores the effects of insecticides in six non-targeted Ae. albopictus strains collected from rice fields with a history of insecticidal usage in comparison with a laboratory susceptible reference strain (REF) and a strain (LHR) collected from a rice field with no, or minimal, history of insecticidal usage. Two types of effects, the resistance development and performance of biological traits, were studied by selecting seven commonly used insecticides in rice fields in Punjab, Pakistan. The results revealed that the strains collected from the rice fields with histories of insecticidal usage exhibited significant levels of resistance to flonicamid, chlorantraniliprole, gamma-cyhalothrin, fipronil, monomehypo, triazophos, and carbofuran, when compared with REF and LHR strains. In addition, Ae. albopictus strains revealed a significantly weaker performance of biological traits (rate of pupae formation, survival of male and female adults (except females of OKR and MTN strains), and ovipositing females) than those of the REF and LHR strains. However, the fecundity of all field strains was only significantly different with that of the REF strain. In conclusion, the results highlight the problem of the negative effects of insecticidal usage in rice fields on nontarget species present in the same environment, and emphasize the need to adopt pest management activities that are safe for the environment.

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Albariman, N. H., S. F. Sabran, N. W. Othman, N. Ishak, A. S. Dheyab y N. Anjur. "Insecticidal and Repellant Activities of Southeast Asia Plants towards Insect Pests: A Review". Asian Journal of Chemistry 32, n.º 5 (2020): 1026–32. http://dx.doi.org/10.14233/ajchem.2020.22474.

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Crops are being damaged by several plant pests. Several strategies have been developed to restrict the damage of cultivated plants by using synthetic pesticides and repellants. However, the use to control these insects is highly discouraged because of their risks on humans. Therefore, several alternatives have been developed from plant extracts to protect crops from plant pests. Accordingly, this review focuses on outlining the insecticidal and repellant activities of Southeast Asia plants towards insect pests. Several extracts of plants from Southeast Asia were investigated to explore their insecticidal and repellant activities. Azadiracha indica (neem) and Piper species were highly considered for their insecticidal and repellant activities compared to other plants. This review also addressed the investigation on extracts of other plant species that were reported to exert insecticidal and repellant activities. Most of the conducted studies have been still in the primarily stage of investigation, lacking a focus on the insecticidal and repellant spectrum and the identification of the active constituents which are responsible for the insecticidal and repellant activity.

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Guo, Da-Le, Bo Wan, Shi-Ji Xiao, Sarah Allen, Yu-Cheng Gu, Li-Sheng Ding y Yan Zhou. "Cyclic Lipopeptides with Herbicidal and Insecticidal Activities Produced by Bacillus clausii DTM1". Natural Product Communications 10, n.º 12 (diciembre de 2015): 1934578X1501001. http://dx.doi.org/10.1177/1934578x1501001235.

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Seven cyclic lipopeptide biosurfactants (1–7) were isolated for the first time from the fermentation broth of endophytic Bacillus clausii DTM1 and were identified as anteisoC13[Val7] surfactin-(L-Glu)-O-methyl-ester (1), anteisoC12[Val7] surfactin (2), anteisoC15[Val7] surfactin (3), isoC14[Leu7] surfactin (4), anteisoC12[Leu7] surfactin (5), nC13[Leu7] surfactin (6), and anteisoC14[Leu7] surfactin-(L-Glu)-O-methyl-ester (7); 1 has not been isolated before as a natural product from any source. Plate-based herbicide and insecticide bioassays showed that all compounds exhibited interesting insecticidal and herbicidal activities.

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Levchenko, Mikhail A., Elena A. Silivanova, Polina A. Shumilova y Natalya A. Sennikova. "INSECTICIDAL SUSCEPTIBILITY AND DETOXIFICATION ENZYME ACTIVITIES IN MUSCA DOMESTICA L. (DIPTERA: MUSCIDAE) OF FIELD POPULATIONS". Problems of Veterinary Sanitation, Hygiene and Ecology 1, n.º 4 (2021): 428–35. http://dx.doi.org/10.36871/vet.san.hyg.ecol.202104008.

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This paper presents the results of the study of insecticidal susceptibility to five modern insecticides and the assessment of detoxifying enzyme activities in house flies Musca domestica L. of two field populations collected at livestock facilities in the Tyumen region. The objects of the study were larva and 3-5-days old adults of M. domestica of the laboratory strain and the first generation obtained from insects of the field populations. The lethal doses for 50% mortality of acetamiprid, fipronil, ivermectin, chlorfenapyr, and deltamethrin against adults M. domestica were calculated by the probit analysis method based on the results of the assessment of intestinal insecticidal activities of these substances by the feeding tests. The results of toxicological experiments showed that adults M. domestica of one field population were tolerant to ivermectin (the resistance ratio was 4,0) while adults of the second field population were tolerant to deltamethrin (the resistance ratio was 4,5). The field populations of M. domestica tested in this study differed in terms of detoxifying enzyme activities in adults. Carboxylesterase and glutathione-S-transferase activities were statistically significantly more in M. domestica adults of the population that was tolerant to deltamethrin than those in adults of the population tolerant to ivermectin. It needs to take into account differences (in insecticidal susceptibilities and in enzyme activities) between insect field populations inhabiting different farms when one selects pest control means against insects in livestock and poultry farms.

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Shilaluke, Kolwane Calphonia y Annah Ntsamaeeng Moteetee. "Insecticidal Activities and GC-MS Analysis of the Selected Family Members of Meliaceae Used Traditionally as Insecticides". Plants 11, n.º 22 (10 de noviembre de 2022): 3046. http://dx.doi.org/10.3390/plants11223046.

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The environmental and health risks associated with synthetic pesticides have increased the demand for botanical insecticides as safer and biodegradable alternatives to control insect pests in agriculture. Hence in this study, five Meliaceae species were evaluated for their insecticidal activities against the Spodoptera frugiperda and the Plutella xylostella larvae, as well as their chemical constituents. Repellence, feeding deterrence, and topical application bioassays were employed to evaluate their insecticidal activities. GC-MS analysis was performed to identify chemical compounds present in each plant. The repellence bioassay indicated that Melia azedarach extracts exhibited the highest repellence percentage against S. frugiperda (95%) and P. xylostella (90%). The feeding deterrence bioassay showed that M. azedarach and Trichilia dregeana extracts displayed excellent antifeeding activity against the S. frugiperda (deterrent coefficient, 83.95) and P. xylostella (deterrent coefficient, 112.25), respectively. The topical application bioassay demonstrated that Ekebergia capensis extracts had the highest larval mortality against S. frugiperda (LD50 0.14 mg/kg). Conversely, M. azedarach extracts showed the highest larval mortality against P. xylostella (LD50 0.14 mg/kg). GC-MS analysis revealed that all plant extracts had compounds belonging to the two noteworthy groups (phenols and terpenes), which possess insecticidal properties. Overall, this study lends scientific credence to the folkloric use of Meliaceae species as potential biocontrol agents against insect pests.

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Msapalla, Agness, Salum Azizi, Menan Jangu, Njelembo J. Mbewe, Johnson Matowo, Magreth F. Shayo, Robert Kaaya et al. "Simplified Procedures for Managing Insecticidal Waste: A Case Report of KCMUCo-PAMVERC Vector Control Product Testing Facility in North-Eastern Tanzania". Environments 9, n.º 6 (25 de mayo de 2022): 65. http://dx.doi.org/10.3390/environments9060065.

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Insecticide testing facilities that evaluate a variety of vector control products may generate a large number of hazardous wastes from routine operations. These wastes originate from degraded technical grade materials, sprayed substrates with Indoor Residual Spraying (IRS), and redundant stock or working insecticidal solutions. The washing of Long-Lasting Insecticidal Nets (LLINs) during preparation for laboratory and experimental hut trials also contribute to wastewater with insecticide content. Human and environmental exposure to insecticidal waste can occur during transport, categorization, storage, and disposal, resulting in environmental pollution and potential health effects. Various national and international guidelines have been devised for safe disposal and should be strictly followed to avoid adverse effects on humans or environment. To facilitate proper insecticidal waste management, this paper outlines simple but safe practices derived from international and national guidelines that can be adopted by other similar facilities. National and international policies related to chemical management were reviewed and translated into Standard Operating Procedures (SOPs), training pathways, and manuals. National Environmental Management Council (NEMC) assessed the test facility and recommended disposal procedures. NEMC recommendations were followed to construct the soak pits for liquid waste disposal while chemical transporters and incinerators were contracted for solid waste disposal. An environmental expert was contracted for environmental audit and annual monitoring. Studies and activities at the facility were evaluated for their waste generation index. Safety manual and SOPs on risk assessment, waste management and disposal, handling hazardous materials, health and safety procedures, and chemical usage were written. At KCMUCo-PAMVERC, an annual average of 0.02 and 24.9 cubic meters of liquid waste, which mainly includes a mixture of water, insecticides, and solvents, were generated from laboratory experiments (phase I) and semi-field LLIN experiments (phase II), respectively, while the IRS semi-field experiments generated an annual average of 88 L of liquid waste and 6.3 tons of solid waste. An annual average of 0.18 cubic meters of liquid waste results from other sources, including expired laboratory reagents. Well-translated national and international policies/regulations may be adopted by insecticide test facilities for proper and effective waste disposal.

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22

Singh, Nagendra, Ravi Kant y Arvind Kumar. "INSECTICIDAL ACTIVITIES OF SOME MIXED LIGAND COMPLEXES OF ZINC". RASAYAN Journal of Chemistry 15, n.º 04 (2022): 2946–49. http://dx.doi.org/10.31788/rjc.2022.1547024.

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The present manuscript deals with the insecticidal and toxicological activities of some mixed ligand complexes of Zinc which are recently been reported. The newly synthesized complexes were also tested for their contact, stomach, antifeedant, and acaricidal activities against insects, pests, and mites. The outcome of screening clearly indicates them as potent insecticidal agents.

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23

Che, Zhiping, Yuee Tian, Jinming Yang, Shengming Liu, Jia Jiang, Mei Hu y Genqiang Chen. "Screening of Insecticidal Activity of Podophyllotoxin Analogues against Athetis dissimilis". Natural Product Communications 14, n.º 1 (enero de 2019): 1934578X1901400. http://dx.doi.org/10.1177/1934578x1901400131.

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As our ongoing work on research of natural-product-based insecticidal agents, eighteen podophyllotoxin analogues with diverse chemical structures were evaluated for their insecticidal activities against the pre-fourth-instar larvae of Athetis dissimilis Hampson in vivo at the concentration of 1 mg/mL. Among all the reported analogues, compounds 6, 8, 12, 13, 15 and 17 showed more potent insecticidal activities than matrine, quinine and toosendanin, three commercial plant secondary metabolites. 2′,6′-Dichloropodophyllotoxin (8) and 2′,6′-dichloroepipodophyllotoxin (13) exhibited the most pronounced and promising insecticidal activity with the final corrected mortality rates of greatly 60%. This suggested that variation of chemical structures in the podophyllotoxin skeleton conspicuously has effect on the insecticidal activity profiles of podophyllotoxin analogues. Moreover, SAR revealed that the substituents and configuration were critical for their insecticidal activities. The results may be useful in guiding further design and structural modification of podophyllotoxins in the development of potential novel insecticidal agents.

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24

MIYAKADO, Masakazu, Isamu NAKAYAMA, Ayumu INOUE, Makoto HATAKOSHI y Nobuo OHNO. "Insecticidal Activities of Phenoxy Analogues of Dihydropipercide". Journal of Pesticide Science 10, n.º 1 (1985): 25–30. http://dx.doi.org/10.1584/jpestics.10.25.

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KATO, Shoichi, Masuko KOBAYASHI, Akio MASUI y Shuichi ISHIDA. "Insecticidal and Antiacetyicholinesterase Activities of Isobutylthioaryl Methanesulfonates". Journal of Pesticide Science 16, n.º 1 (1991): 9–18. http://dx.doi.org/10.1584/jpestics.16.9.

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26

INAMORI, Yoshihiko, Yukiko OKAMOTO, Yoko TAKEGAWA, Hiroshi TSUJIBO, Yoshikazu SAKAGAMI, Yuko KUMEDA, Mitsunobu SHIBATA y Atsushi NUMATA. "Insecticidal and Antifungal Activities of Aminorhodanine Derivatives". Bioscience, Biotechnology, and Biochemistry 62, n.º 5 (enero de 1998): 1025–27. http://dx.doi.org/10.1271/bbb.62.1025.

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27

Li, Huan, Na Yang, Lixia Xiong y Baolei Wang. "Design, Synthesis and Biological Evaluation of Novel Thienylpyridyl- and Thioether-Containing Acetamides and Their Derivatives as Pesticidal Agents". Molecules 26, n.º 18 (17 de septiembre de 2021): 5649. http://dx.doi.org/10.3390/molecules26185649.

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Referring to the structural information of the “hit” compound A from the reported pharmacophore-based virtual screening, a series of novel thienylpyridyl- and thioether/sulfoxide/sulfone-containing acetamide derivatives have been designed and synthesized. The structures of new compounds were confirmed by 1H NMR, 13C NMR and HRMS. The single-crystal structure of A was firstly reported. All the new synthesized compounds were evaluated for insecticidal activities on Mythimna separata Walker and Plutella xylostella L. Through a step-by-step structural optimization, the high insecticidal agents, especially towards Plutella xylostella L., have been found, and thienylpyridyl- and sulfone/thioether-containing acetamides Iq, Io, Ib and A, which are comparable with the control insecticides cartap, triflumuron and chlorantraniliprole in the present study, can be used as novel lead structures for new insecticides innovation research. In addition, some of the compounds, e.g., A, Ih, Id, Io and Iq, also exhibited favourable fungicidal activities against Physalospora piricola, Rhizoctonia cerealis and Sclerotinia sclerotiorum and would provide useful guidance for the design and development of new fungicides.

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28

Xi, Xin, Ximei Zhao, Feng Zhu, Jielu Wei, Zhan Hu, Wenjun Wu y Jiwen Zhang. "Synthesis and Insecticidal Activity of β-Dihydroagarofuran Acetal Derivatives". Natural Product Communications 13, n.º 4 (abril de 2018): 1934578X1801300. http://dx.doi.org/10.1177/1934578x1801300404.

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To search for improved insecticidal compounds based on β-dihydroagarofuran sesquiterpenoids, forty-four β-dihydroagarofuran acetal derivatives were designed and synthesized. Insecticidal activities and structure-activity relationship of these target compounds were evaluated. Some of the newly synthesized β-dihydroagarofuran acetal compounds were found to show higher insecticidal activity against sixth-instar larvae of Mythimna separate. Especially, compounds 2.2.9, 2.2.10, 2.2.11, 2.3.4, 2.3.6, 2.3.7, 2.5.4, 2.5.7 had great insecticidal activities with lower LD50 than that of the positive control celangulin-V (110.13 μg/g). It deserves mentioning that compound 2.2.11 showed the lowest LD50 (60.33 μg/g) among these compounds. Structure-activity relationship results suggested that the substituent groups of 1-, 6- and 9-positions of the target structures could greatly affect the insecticidal activity. Especially, when the substituent groups of 6-position were n-propyl, n-butyl, allyl, propargyl, o-fluorobenzyl, and p-fluorobenzyl, the compounds showed outstanding insecticidal activities.

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29

Deng, Xile, Can Jin, Yong Xie, Junbo Gao y Xiaomao Zhou. "Design, Synthesis, and Evaluation of X-ray Crystal Structure, Biological Activities, DFT Calculations, and Molecular Docking of Phenyl Imidazolidin-2-One Derivatives". Crystals 10, n.º 8 (18 de agosto de 2020): 713. http://dx.doi.org/10.3390/cryst10080713.

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Eight phenyl imidazolinone derivatives were synthesized from N2-(2,4-dimethylphenyl)-N1-methyformamidine (DPMF) via scaffold-hopping method using the ring-closure approach. The prepared compounds were verified using 1H and 13C NMR and HRMS spectroscopies. The structure of compound 3c was confirmed by single-crystal X-ray diffraction analysis. The mean plane of the phenyl and imidazolinone moieties was almost coplanar with an angle of 8.85(4)°. In the crystal, molecules were interlinked with intermolecular hydrogen bonds (N–H···O and C–H···O), generating a network structure. Additionally, compound 3f displayed the highest insecticidal activity (86.7%) against Plutella xylostella at 600 mg/L, which was significantly higher than the insecticidal activity (23.0%) of DPMF. Also, compound 3d displayed good fungicidal activities against Phytophthora capsici, Phytophthora sojae, and Phytophthora infestans. Density functional theory (DFT) calculations were performed to explain the insecticidal and fungicidal activities of phenyl imidazolidin-2-one derivatives, especially potent compounds 3f and 3d. Moreover, the binding modes of compounds 3a–h and DPMF against octopamine receptor of Plutella xylostella were studied by homology modeling and molecular docking. Therefore, a preliminary structure–activity relationship (SAR) was derived and discussed. These results encourage the exploration of novel insecticides and fungicides based on DPMF.

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30

Liu, Qi, Kai Chen, Qiang Wang, Jueping Ni, Yufeng Li, Hongjun Zhu y Yuan Ding. "Synthesis, insecticidal activity, structure–activity relationship (SAR) and density functional theory (DFT) of novel anthranilic diamides analogs containing 1,3,4-oxadiazole rings". RSC Adv. 4, n.º 98 (2014): 55445–51. http://dx.doi.org/10.1039/c4ra06356b.

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A series of anthranilic diamides analogs (5a–x) containing 1,3,4-oxadiazole rings were synthesized, and their insecticidal activities were evaluated. The density functional theory (DFT) studies was used to understand the various insecticidal activities.

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31

Dias, Marcelle L., Alexander M. Auad, Milena C. Magno, Tiago T. Resende, Marcy G. Fonseca y Sandra E. B. Silva. "Insecticidal Activity of Compounds of Plant Origin on Mahanarva spectabilis (Hemiptera: Cercopidae)". Insects 10, n.º 10 (19 de octubre de 2019): 360. http://dx.doi.org/10.3390/insects10100360.

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The damage caused by spittlebugs varies according to the species of grass, and the losses can reach alarming levels. Measures for population control are currently restricted to the use of resistant grasses and the diversification of pastures. Therefore, alternative control measures are necessary, such as the use of botanical insecticides. The aim of this study was to evaluate the insecticidal activities of thymol, carvacrol, eugenol, cinnamaldehyde, and trans-anethole on Mahanarva spectabilis eggs, nymphs, and adults under laboratory conditions. In the egg tests, treatments with eugenol, carvacrol, and thymol showed the highest mortalities, presenting efficiencies higher than 85% after 48 h of application. In the nymph tests, the treatments with thymol and carvacrol at 2.5% and eugenol at 2.0% and 2.5% showed intermediate efficiencies, with values above 61%. The highest mortality was observed in the treatment with trans-anethole at 2.5%, with an efficiency of 95%. In the tests with adults, only treatment with trans-anethole at 2.5% obtained an efficiency reaching 90%; in the other treatments, the efficiency did not exceed 51%. These results showed that, at these concentrations, trans-anethole presents a high rate of insecticidal activity on M. spectabilis nymphs and adults and, therefore, is recommended as a potential natural insecticide for the control of this pest.

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32

Lin, Meihong, Xiaoyang Bi, Lijuan Zhou y Jiguang Huang. "Insecticidal Triterpenes in Meliaceae: Plant Species, Molecules, and Activities: Part II (Cipadessa, Melia)". International Journal of Molecular Sciences 23, n.º 10 (10 de mayo de 2022): 5329. http://dx.doi.org/10.3390/ijms23105329.

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Plant-originated triterpenes are important insecticidal molecules. Research on the insecticidal activity of molecules from Meliaceae plants has always been a hotspot due to the molecules from this family showing a variety of insecticidal activities with diverse mechanisms of action. In this paper, we discussed 116 triterpenoid molecules with insecticidal activity from 22 plant species of five genera (Cipadessa, Entandrophragma, Guarea, Khaya, and Melia) in Meliaceae. In these genera, the insecticidal activities of plants from Entandrophragma and Melia have attracted substantial research attention in recent years. Specifically, the insecticidal activities of plants from Melia have been systemically studied for several decades. In total, the 116 insecticidal chemicals consisted of 34 ring-intact limonoids, 31 ring-seco limonoids, 48 rearranged limonoids, and 3 tetracyclic triterpenes. Furthermore, the 34 ring-intact limonoids included 29 trichilin-class chemicals, 3 azadirone-class chemicals, and 1 cedrelone-class and 1 havanensin-class limonoid. The 31 ring-seco limonoids consisted of 16 C-seco group chemicals, 8 B,D-seco group chemicals, 4 A,B-seco group chemicals, and 3 D-seco group chemicals. Furthermore, among the 48 rearranged limonoids, 46 were 2,30-linkage group chemicals and 2 were 10,11-linkage group chemicals. Specifically, the 46 chemicals belonging to the 2,30-linkage group could be subdivided into 24 mexicanolide-class chemicals and 22 phragmalin-class chemicals. Additionally, the three tetracyclic triterpenes were three protolimonoids. To sum up, 80 chemicals isolated from 19 plant species exhibited antifeedant activity toward 14 insect species; 18 chemicals isolated from 17 plant species exhibited poisonous activity toward 10 insect species; 16 chemicals isolated from 11 plant species possessed growth-regulatory activity toward 8 insect species. In particular, toosendanin was the most effective antifeedant and insect growth-regulatory agent. The antifeedant activity of toosendanin was significant. Owing to its high effect, toosendanin has been commercially applied. Three other molecules, 1,3-dicinnamoyl-11-hydroxymeliacarpin, 1-cinnamoyl-3-methacryl-11-hydroxymeliacarpin, and 1-cinnamoyl-3-acetyl-11-hydroxymeliacarpin, isolated from Meliaazedarach, exhibited a highly poisonous effect on Spodoptera littoralis; thus, they deserve further attention.

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33

Hua, Xuewen, Wutao Mao, Zhijin Fan, Xiaotian Ji, Fengyun Li, Guangning Zong, Haibin Song et al. "Novel Anthranilic Diamide Insecticides: Design, Synthesis, and Insecticidal Evaluation". Australian Journal of Chemistry 67, n.º 10 (2014): 1491. http://dx.doi.org/10.1071/ch13701.

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Three series of new anthranilic diamide derivatives containing sulfide, N-cyanomethylsulfilimine, and N-cyanomethylsulfoximine groups were designed and synthesized by coupling the active substructures of anthranilic diamides and sulfoxaflor. The structures of the synthesized compounds were confirmed by infrared spectroscopy, 1H and 13C NMR, and elemental analysis. Several unique structural characteristics were revealed via the crystal structure analysis of compound N-(2-(2-methyl-2-(methylthio)propylcarbamoyl)-4-chloro-6-methylphenyl)-3-bromo-1-(3-chloropyridin-2-yl)-1H-pyrazole-5-carboxamide 16e. Bioassay results indicated that most of the synthesized compounds showed superior insecticidal activities against Mythimna separata and Plutella xylostella when compared with the positive control cyantraniliprole. In particular, N-(2-(2-methyl-2-(N-cyanomethylsulfideimino)propylcarbamoyl)-4-chloro-6-methylphenyl)-3-bromo-1-(3-chloropyridin-2-yl)-1H-pyrazole-5-carboxamide 17e showed excellent insecticidal activity against Mythimna separata, with a mortality rate of 100 % at a concentration of 1 µg mL–1. These results indicated that sulfide, N-cyanomethylsulfilimine, and N-cyanomethylsulfoximine moieties, as important active substructures, could improve or maintain the activity of the anthranilic diamide and promote novel pesticide development.

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Wu, Xiaoqing, Guangyu Wang, Guangxin Xu y Li Chen. "Synthesis and Insecticidal Activity of Fire Ant Venom Alkaloid-Based 2-Methyl-6-alkyl-Δ1,6-piperideines". Molecules 27, n.º 3 (7 de febrero de 2022): 1107. http://dx.doi.org/10.3390/molecules27031107.

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2,6-dialkylpiperideines found in the venom of Solenopsis (Hymenoptera, Formicidae) fire ants are a range of compounds possessing various biological activities. A series of racemic 2-methyl-6-alkyl-Δ1,6-piperideines were synthesized for chemical confirmation of the natural products found in fire ant venom, and the evaluation of their biological activity. Synthetic Δ1,6-piperideines and the natural compounds in the cis-alkaloid fraction of Solenopsis invicta had identical mass spectra and retention times. Their insecticidal activities against the third-instar larvae of cotton bollworm (Helicoverpa armigera) were evaluated by using injection and topical application methods. All three compounds exhibited no lethal effect at concentrations of 0.05–0.4 mol/L by topical treatment, but moderate lethal effect at 0.4 mol/L through injection treatment. Compound 6a showed significantly higher activity than the natural insecticide nicotine. The differences in activity among compounds 6b, 6c and nicotine were not significant. The elongation of the carbon chain at the 6-position of the piperideine ring appears to decrease insecticidal activity.

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35

Levchenko, Silivanova, Shumilova, Sennikova y Kinareikina. "BIOLOGICAL PARAMETERS AND ENZYME ACTIVITIES IN MUSCA DOMESTICA UNDER SELECTION WITH FIPRONIL". THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL, n.º 22 (19 de mayo de 2021): 295–300. http://dx.doi.org/10.31016/978-5-6046256-1-3.2021.22.295-300.

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Insect resistance to insecticides is one of the main issues of veterinary, medicine, and horticulture around the world. Knowledge of insecticidal resistance mechanisms is crucial for the development of insect control programs. The aim of the present study was to assess some biological parameters and enzyme activities in the house fly Musca domestica L. under selection with fipronil. The selection of M. domestica with fipronil was conducted by non-choice feeding when adults in each generation were fed with sugar that was pre-treated with insecticide solution. In even-numbered year generation, we evaluated the duration of individual development stages, the weight of individuals, fertility, and activity of the main detoxification enzymes (monooxygenases, esterases, and glutathione-S-transferases) in larvae and adults. The assessment of insect susceptibility to fipronil showed that larvae in the tenth generation of the fipronil-selected strain were more susceptible to fipronil than the individuals in the laboratory strain, and adults did not differ from the control as per this indicator. In the tenth generation of the fipronil-selected strain, we found that the duration of the development period from the egg stage to the emergence of adults lasted longer (by 18%) compared to the laboratory line. We noted that the activity of monooxygenases and glutathione-S-transferase in larvae and adults varied in certain generations of the fipronil-selected strain.

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Zhang, Peiwen, Deqiang Qin, Jianjun Chen y Zhixiang Zhang. "Plants in the Genus Tephrosia: Valuable Resources for Botanical Insecticides". Insects 11, n.º 10 (21 de octubre de 2020): 721. http://dx.doi.org/10.3390/insects11100721.

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Synthetic insecticides are effective in controlling insect pests but can also harm nontarget organisms and the environment. During the last 40 years, there has been an increasing interest in alternative insecticides, particularly those derived from plants, commonly known as botanical insecticides. However, commercially available botanical insecticides remain limited. Rotenone is one of the earliest identified compounds and was used as fish poison and pest management. Due to its link with Parkinson disease, the use of rotenone was banned in many developed countries. Rotenone used to be isolated from Derris spp. and Lonchocarpus spp., and it can also be isolated from Tephrosia species. In this article, we present basic botanical information on selected Tephrosia species and their major compounds related to insecticidal activities and highlight the current use of extracts derived from some species, Tephrosia vogelii in particular, for control of insect pests in stored grains and crop production. The crude extracts contain multiple bioactive compounds, mainly rotenone, deguelin, rotenolone, and tephrosin, which act in either additive or synergistic fashion, resulting in effective control of insect pests. There are about 400 species in the genus Tephrosia, and species and even strains or variants vary greatly in these active compounds. We argue that a systematic evaluation of bioactive compounds in different species are needed, and species or strains with high insecticidal activities should be selected for use in the sustainable control of insect pests.

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37

Ben Bnina, Enis, Hafedh Hajlaoui, Ikbal Chaieb, Moncef Ben Said y Hichem Ben Jannet. "Chemical composition, antimicrobial and insecticidal activities of the tunisian Citrus aurantium essential oils". Czech Journal of Food Sciences 37, No. 2 (10 de mayo de 2019): 81–92. http://dx.doi.org/10.17221/202/2017-cjfs.

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The chemical composition of volatile fractions from leaves, flowers and peels of Citrus aurantium growing in Tunisia obtained by hydrodistillation were analysed using GC and GC-MS. Furthermore, the isolated essential oils were evaluated for their in vitro antimicrobial activity against eight bacteria, eight phytopathogenic and nine human pathogenic fungi. The essential oils from peels and its main compound limonene have been found to possess strong contact toxicity against four storage-grain insects. The highest mortality rate was observed when the essential oil was applied against Cryptolestes ferrugineus, Liposcelis bostrychophila and Tribolium castaneum.

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38

Nguyen, Binh, Jamnian Chompoo y Shinkichi Tawata. "Insecticidal and Nematicidal Activities of Novel Mimosine Derivatives". Molecules 20, n.º 9 (14 de septiembre de 2015): 16741–56. http://dx.doi.org/10.3390/molecules200916741.

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39

Pandey, Rashmi y R. P. Srivastava. "Insecticidal activities of medicinal plants againstSpodoptera Litura(F.)". Indian Journal of Entomology 77, n.º 4 (2015): 407. http://dx.doi.org/10.5958/0974-8172.2015.00079.6.

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Huang, Gangliang y Hualiang Huang. "Synthesis, antiasthmatic, and insecticidal/antifungal activities of allosamidins". Journal of Enzyme Inhibition and Medicinal Chemistry 34, n.º 1 (1 de enero de 2019): 1226–32. http://dx.doi.org/10.1080/14756366.2019.1623208.

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Franzios, Gerasimos, Maria Mirotsou, Emmanouel Hatziapostolou, Jiri Kral, Zacharias G. Scouras y Penelope Mavragani-Tsipidou. "Insecticidal and Genotoxic Activities of Mint Essential Oils". Journal of Agricultural and Food Chemistry 45, n.º 7 (julio de 1997): 2690–94. http://dx.doi.org/10.1021/jf960685f.

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42

Dekeyser, Mark A., Paul T. McDonald y Gilbert W. Jr Angle. "Synthesis and Miticidal and Insecticidal Activities of Biphenylhydrazinecarboxylates". Journal of Agricultural and Food Chemistry 42, n.º 6 (junio de 1994): 1358–60. http://dx.doi.org/10.1021/jf00042a022.

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43

Karpouhtsis, Ioannis, Evagelia Pardali, Efi Feggou, Stella Kokkini, Zacharias G. Scouras y Penelope Mavragani-Tsipidou. "Insecticidal and Genotoxic Activities of Oregano Essential Oils". Journal of Agricultural and Food Chemistry 46, n.º 3 (marzo de 1998): 1111–15. http://dx.doi.org/10.1021/jf970822o.

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44

Karpouthis, Ioannis, Evagelia Pardali, Efi Feggou, Stella Kokkini, Zacharias G. Scouras y Penelope Mavragani-Tsipidou. "Insecticidal and Genotoxic Activities of Oregano Essential Oils". Journal of Agricultural and Food Chemistry 46, n.º 4 (abril de 1998): 1694. http://dx.doi.org/10.1021/jf9801670.

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45

Dardeer, Hemat M., Elghareeb E. Elboray y Ghada S. Mohamed. "Antibacterial and Insecticidal Activities of the Revived Azoanthrols". Polycyclic Aromatic Compounds 40, n.º 3 (21 de mayo de 2018): 622–32. http://dx.doi.org/10.1080/10406638.2018.1466812.

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46

Zhang, Dong-Dong, Shu-Xia Cui, Zhi-Ping Xu, Dong-Mei Li y Zhong-Zhen Tian. "Synthesis and insecticidal activities of novel bridged-neonicotinoids". Chinese Chemical Letters 28, n.º 8 (agosto de 2017): 1743–45. http://dx.doi.org/10.1016/j.cclet.2017.05.002.

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47

Hou, Qing-Qing, Yi-Fei Jing y Xu-Sheng Shao. "Synthesis and insecticidal activities of 1,8-naphthyridine derivatives". Chinese Chemical Letters 28, n.º 8 (agosto de 2017): 1723–26. http://dx.doi.org/10.1016/j.cclet.2017.05.016.

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48

Roberts, Ralph R. y Lawrence A. D. Williams. "Acaricidal and insecticidal activities of three synthetic oxazolidinones". Pesticide Science 33, n.º 3 (1991): 393–98. http://dx.doi.org/10.1002/ps.2780330312.

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49

Beaulieu, Rémi, Eric Grand, Imane Stasik, Jacques Attoumbré, Quentin Chesnais, Virginie Gobert, Arnaud Ameline, Philippe Giordanengo y José Kovensky. "Synthesis and insecticidal activities of novel solanidine derivatives". Pest Management Science 75, n.º 3 (3 de octubre de 2018): 793–800. http://dx.doi.org/10.1002/ps.5180.

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Chao, Rong, Gulab Said, Qun Zhang, Yue-Xuan Qi, Jie Hu, Cai-Juan Zheng, Ji-Yong Zheng, Chang-Lun Shao, Guang-Ying Chen y Mei-Yan Wei. "Design, Semisynthesis, Insecticidal and Antibacterial Activities of a Series of Marine-Derived Geodin Derivatives and Their Preliminary Structure–Activity Relationships". Marine Drugs 20, n.º 2 (18 de enero de 2022): 82. http://dx.doi.org/10.3390/md20020082.

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To enhance the biological activity of the natural product geodin (1), isolated from the marine-derived fungus Aspergillus sp., a series of new ether derivatives (2–37) was designed and semisynthesized using a high-yielding one-step reaction. In addition, the insecticidal and antibacterial activities of all geodin congeners were evaluated systematically. Most of these derivatives showed better insecticidal activities against Helicoverpa armigera Hübner than 1. In particular, 15 showed potent insecticidal activity with an IC50 value of 89 μM, comparable to the positive control azadirachtin (IC50 = 70 μM). Additionally, 5, 12, 13, 16, 30 and 33 showed strong antibacterial activity against Staphylococcus aureus and Aeromonas salmonicida with MIC values in the range of 1.15–4.93 μM. The preliminary structure–activity relationships indicated that the introduction of halogenated benzyl especially fluorobenzyl, into 1 and substitution of 4-OH could be key factors in increasing the insecticidal and antibacterial activities of geodin.

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