Relevant bibliographies by topics / Two-spotted spider mite

Academic literature on the topic 'Two-spotted spider mite'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Journal articles on the topic "Two-spotted spider mite":

1

Bostanian, Noubar J., Martin Trudeau, and Jacques Lasnier. "Management of the two-spotted spider mite, Tetranychus urticae [Acari: Tetranychidae] in eggplant fields." Phytoprotection 84, no. 1 (January 9, 2004): 1–8. http://dx.doi.org/10.7202/007439ar.

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Summary A three-season field evaluation showed that eggplants (Solanum melongena) are very tolerant to damage caused by the two-spotted spider mite, Tetranychus urticae. Although large numbers of the predacious mites, Neoseiulus fallacis or Phytoseiulus persimilis were released, biological control of the two-spotted spider mite could not be sustained in the field. Based on a preliminary comparison of yield in both sprayed and unsprayed plots and on a three-year qualitative assessment, a tentative action threshold of 600 two-spotted spider mites per leaf would not decrease yield and would reduce the number of acaricide treatments per season. The new acaricide spirodiclofen was effective against the two-spotted spider mite in a preliminary trial.
2

Gillman, Jeffrey H., Michael A. Dirr, and S. Kristine Braman. "Gradients in Susceptibility and Resistance Mechanisms of Buddleia L. Taxa to the Two-spotted Spider Mite (Tetranychus urticae Koch)." Journal of the American Society for Horticultural Science 124, no. 2 (March 1999): 114–21. http://dx.doi.org/10.21273/jashs.124.2.114.

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Buddleia taxa were assessed for two-spotted spider mite (Tetranychus urticae Koch) resistance using a leaf disk bioassay, a novel shell vial bioassay and a field trial. Leaf pubescence and chemistry were examined for their role in two-spotted spider mite resistance. Results from bioassays and field sampling identified highly resistant taxa including B. fallowiana Balif. `Alba' and B. davidii × B. fallowiana Franch. `Cornwall Blue' as well as susceptible taxa including B. davidii Franch. `African Queen' and B. lindleyana Fort. ex Lindl. `Gloster'. The shell vial bioassay was an accurate predictor of field resistance to spider mite. Leaf pubescence was quantified by calculating the collective length of trichome branches per square millimeter of leaf surface area [effective branch length (EBL)]. EBL values ranged from 39 to 162 mm·mm-2 of leaf surface area among Buddleia taxa. Resistance was positively correlated with increased pubescence. Removal of pubescence by peeling resulted in increased oviposition of two-spotted spider mites. Exposing female two-spotted spider mites to a methylene chloride extract of B. davidii × B. fallowiana `Cornwall Blue' using a modified shell vial bioassay resulted in reduced oviposition and a methylene chloride extract of B. davidii `African Queen' resulted in no difference in oviposition when compared with a control. While pubescence is the best indicator of resistance to the two-spotted spider mite in Buddleia taxa, it is possible that defensive compounds are involved.
3

Langston, William C. "Two Spotted Spider Mite Control, 1990." Insecticide and Acaricide Tests 16, no. 1 (January 1, 1991): 186. http://dx.doi.org/10.1093/iat/16.1.186.

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Abstract This test was designed to compare ABG-6277A to Kelthane for control of two-spotted spider mite. Delta Pine 50 was planted 8 May in plots 8 rows × 40 ft long. The plots were arranged in a randomized complete block design with 4 replications. The plots were infested with TSSM by placing one infested bean plant every 3 steps along the center 2 rows of each plot on 29 Jun. Mite predators were reduced by weekly sprayings of Asana 0.025 lb (AI)/acre beginning on 28 Jun. Treatments were applied 11 and 18 Jul with a Hi Boy sprayer with tips every 20 inches delivering 10 gpa. The percent mite infested leaves in the 5th and 6th position from the terminal was determined by examining 25 leaves on the center 2 rows of each plot. Sampling dates were 18 and 24 Jul and 1 and 7 Aug. Yield was not measured because of leaf blight which partially defoliated plots.
4

Szafranek, Piotr. "Occurrence of Two-Spotted Spider Mite (Tetranychus urticae Koch) on Potentilla fruticosa Cultivars." Journal of Horticultural Research 24, no. 2 (December 1, 2016): 25–30. http://dx.doi.org/10.1515/johr-2016-0017.

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Abstract Potentilla fruticosa L. (Rosaceae Juss.) is one of the most popular deciduous shrubs cultivated in Poland. Among pests identified so far on P. fruticosa, a serious threat is caused by two-spotted spider mite Tetranychus urticae Koch (Acari: Tetranychidae). During three-year study, the occurrence of two-spotted spider mite T. urticae on four cultivars of P. fruticosa: ‘Goldfinger’, ‘McKay’s White’, ‘Uman’ and ‘Pink Beauty’ grown in field conditions was compared. While conducting experiment, weather conditions were monitored. The number of eggs and motile forms of two-spotted spider mite were recorded separately. The most attractive cultivar to spider mite was ‘Goldfinger’. The largest amount of motile forms of mites and their eggs were found on the leaves of this cultivar in all three years of study. The least number of pests occurred on the cv. ‘Pink Beauty’. However, differences in the abundance of this pest on all studied cultivars were variable during the growing seasons.
5

Vidrih, Matej, Anja Turnšek, Magda Rak Cizej, Tanja Bohinc, and Stanislav Trdan. "Results of the Single Release Efficacy of the Predatory Mite Neoseiulus californicus (McGregor) against the Two-Spotted Spider Mite (Tetranychus urticae Koch) on a Hop Plantation." Applied Sciences 11, no. 1 (December 24, 2020): 118. http://dx.doi.org/10.3390/app11010118.

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In 2015, we studied the efficiency of the predatory mite Neoseiulus californicus (McGregor) for suppression of the two-spotted spider mite Tetranychus urticae in a field experiment at a hop plantation. We randomly arranged four treatments in a three-block experiment. Fungicides were used in all treatments; insecticides were used in all treatments except the predatory mite treatment and acaricides were used in only two treatments. A single inundative release of the mite N. californicus was carried out on 4 July. On four different dates (10 June, 17 July, 29 July and 9 August), we counted the eggs and the mobile stages (larvae, nymphs and adults) of the two-spotted spider mite in all four treatments. In the treatment with the predatory mite, we established the fewest eggs and mobile stages of T. urticae 14 days after the release of the predator. The selected acaricides in our research acted in a primarily ovicidal manner, but we did not detect satisfactory effects on the mobile stages of the two-spotted spider mite. This result suggests the emergence of resistance of two-spotted spider mites to the acaricides hexythiazox and abamectin. Our research established comparable effects of the predatory mite N. californicus and acaricides, and further improvement of the efficiency would require release of the natural enemy into a hop plantation in mid-June, followed by a second release three weeks later. The costs of acaricide use in our experiment were from 12.7-fold (two sprayings of hexythiazox, and a single spraying with abamectin) to 17.8-fold (single treatments of hexythiazox and abamectin) lower than those of a single release of the biological control agent in question. The results of our study represent a starting point for future research, which could achieve satisfactory results in suppressing two-spotted spider mites on a hop plantation by repeated use of the predatory mite N. californicus.
6

Gillman, Jeff, Michael Dirr, and Kristine Braman. "Factors Affecting the Resistance of Buddleia Species to the Two-Spotted Spider Mite." HortScience 32, no. 4 (July 1997): 595A—595. http://dx.doi.org/10.21273/hortsci.32.4.595a.

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Buddleia species are attractive ornamental shrubs whose major cultural problem is infestations of the two-spotted spider mite. Two factors, drought stress and leaf pubescence, were examined for their effects on spider mite infestations. Drought stress was examined by placing 20 plants into a randomized block design and stressing ten of the plants. No differences in mite life parameters were found, although there was more uninfested area in nonstressed plants. This was probably due to the nonstressed plants' ability to outgrow the spider mite infestation. Leaf texture was examined by placing four female spider mites on 5 leaf disks of 37 cultivars and species of Buddleia and counting the number of eggs laid after 96 hours. There was a strong correlation between leaf pubescence and number of eggs laid. In a second experiment, using a shell vial with a leaf placed underneath the lid and five female spider mites in the vial itself, leaf pubescence was either removed with facial peel or left. In all cases but one, the removal of pubescence increased the number of eggs laid by the spider mites.
7

Salmane, Ineta. "Effect Of Agrotechnical Measures And Varieties On Seasonal Dynamics Of Tetranychus Urticae Koch (Acari, Trombidiformes, Tetranychidae) On High Tunnel-Cultivated Garden Strawberries." Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences. 69, no. 1-2 (April 1, 2015): 45–49. http://dx.doi.org/10.1515/prolas-2015-0005.

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Abstract The aim of the present study was to determine the seasonal pattern of two-spotted spider mite Tetranychus urticae on strawberries cultivated in polythene-covered high tunnels in temperate climatic conditions. Various cultivars were used and the effect of modification of plant covering indices on abundance and incidence of these mites was also tested. The number of two-spotted spider mites was relatively low at the beginning of the vegetation season and started to increase when average air temperature rose above 20 to 25 °C. In the experiment two types of tunnels differing in additional plant cover were used. The maximum mite abundance did not significantly vary between varieties in tunnel 1 conditions, but it was significantly lower for variety 'Sonata' in tunnel 2 conditions. Mite numbers significantly declined after strawberry foliage mowing and removal of polythene cover. Mite development was prolonged in tunnel 1, where additional cover of plants was used and higher early season air temperature was recorded in comparison to tunnel 2. It was concluded that increase in early season temperature can increase two-spotted spider mite abundance and have a more negative effect on strawberry plants in respect of foliage damage by mites.
8

Konopacki, Paweł J., and Wojciech Warabieda. "Assessment of Dimensions in Order to Aid Classification of European Red Mite and Two-Spotted Spider Mite by Means of Digital Imaging of Infected Leaves." Agricultural Engineering 22, no. 4 (December 1, 2018): 15–24. http://dx.doi.org/10.1515/agriceng-2018-0032.

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AbstractThe methods currently used to assess orchard infestation are time-consuming and do not take into account non-adult forms of mites, due to their small size. Advance in digital imaging technology, however, has resulted in the discovery of a more viable method to enable a fast and reliable assessment of orchard infestation. Digital images of infected apple leaves were made and examined for the presence of European red mites and two-spotted spider mites. As well as adult mites, non-adult European red mite forms were also encountered. After extracting all objects considered as mites from the image, imaging software was then used to assess their dimension and shape parameters. Length, width, area, and equivalent diameter were different for all three observed mite groups: adult female European red mites, possible non-adult European red mites and adult two-spotted spider mites. Differences in circularity and elongation were found in adult two-spotted spider mites and various forms of European red mites, while the perimeter was similar in adult European red mites and two-spotted spider mites, and different in the non-adult forms of European red mites. However, as the ranges of 95% prediction intervals for these features overlap, a combination of at least two features as well as employing statistical procedures may greatly increase the probability of appropriate classification of the observed objects as different mites.
9

Doğan, Salih, Mustafa Çağlar, Bülent Çağlar, Çağrı Çırak, and Erhan Zeytun. "Structural characterization of the silk of two-spotted spider mite Tetranychus urticae Koch (Acari: Tetranychidae)." Systematic and Applied Acarology 22, no. 4 (April 18, 2017): 572. http://dx.doi.org/10.11158/saa.22.4.11.

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The present investigation was undertaken to obtain information about the structural and morphological properties of the silk of two-spotted spider mite Tetranychus urticae Koch (Acari: Tetranychidae) by means of the atomic force microscope (AFM), scanning electron microscope (SEM), energy dispersive X-ray spectrophotometer (EDX) and attenuated total reflection Fourier transmission infrared spectroscopy (ATR-FTIR) techniques. AFM images show that the shapes of silken threads produced by both female and male mites are similar and have non-uniform cylindrical structure. In general, the appearance of silks produced by female mites is smoother than those of the male mites. In addition, it is determined that the silk threads produced by both female and male individuals have single and double stranded structure. There were differences in the thread dimensions of female and male which could depend on the body size of the mites. However, there is no statistically significant correlation between the body size of the mites and their thread dimensions. The silk material was found to consist predominantly of C, N and O elements and minor fractions of Al, P, Cl and K. The ATR-FTIR spectrum of the silk of two-spotted spider mite exhibited characteristic vibrational modes originating from amid groups, which were attributed to random coil and β-sheet molecular conformation in the protein structure of the silk of two-spotted spider mite. Understanding the features of the two-spotted spider mite silks may be of practical importance for the future studies related to biomaterial and material science.
10

Grazzini, Richard, Donald Walters, Jody Harmon, David J. Hesk, Diana Cox-Foster, June Medford, Richard Craig, and Ralph O. Mumma. "Inheritance of Biochemical and Morphological Characters Associated with Two-spotted Spider Mite Resistance in Pelargonium ×hortorum." Journal of the American Society for Horticultural Science 122, no. 3 (May 1997): 373–79. http://dx.doi.org/10.21273/jashs.122.3.373.

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Diploid zonal geraniums (Pelargonium ×hortorum) are able to resist attack by small arthropod pests such as the two-spotted spider mite (Tetranychus urticae Koch) when exudate produced by tall glandular trichomes contains a high percentage of ω5-unsaturated anacardic acids. Trichomes of susceptible plants exude primarily saturated anacardic acids. Inbred mite-resistant and -susceptible geraniums were reciprocally crossed and the F1, F2, and backcross generations were examined for anacardic acid composition and trichome density. Selected F2 plants were bioassayed for resistance to two-spotted spider mites. High concentrations of ω5-unsaturated anacardic acids in resistant plants are conditioned by a single dominant allele. We propose that inheritance of tall glandular trichome density can be controlled by a small number of loci (possibly as few as one) exhibiting codominance. F2, with low densities of tall glandular trichomes and producing ω5-unsaturated anacardic acids, displayed effective resistance to two-spotted spider mites as measured by mite mortality and fecundity. A genetic model for the biosynthesis of anacardic acids is proposed.
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Journal articles Dissertations / Theses

Dissertations / Theses on the topic "Two-spotted spider mite":

1

Murata, Yasumasa. "UVB Damage and Photoreactivation in the Two-spotted Spider Mite, Tetranychus urticae." 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225647.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(農学)
甲第20422号
農博第2207号
新制||農||1047(附属図書館)
学位論文||H29||N5043(農学部図書室)
京都大学大学院農学研究科地域環境科学専攻
(主査)教授 天野 洋, 教授 田中 千尋, 准教授 刑部 正博
学位規則第4条第1項該当
2

Jones, Graeme. "Potential control of two spotted spider mite, tetranycus urticae koch using #beta#-fraction." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299764.

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Duarte, Vanessa da Silveira. "Studies for implementation of Neozygites floridana as control agent of two-spotted spider mite in strawberry." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-26072013-100955/.

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Neozygites floridana is an important natural enemy of Tetranychus urticae in many crops, including strawberry. In this crop there has been some changes in the production system from open field to low tunnel. This new system presents benefits to strawberry production, moreover this system increases problems with spider mites and some fungal plant pathogens; consequently increasing the use of pesticides. In order to integrate N. floridana in the management of spider mites in strawberry there are still many important aspects to be revealed on the biology, epizootiology of the fungus and the effect of crop systems on its prevalence in the field. For this, three studies were performed, being the first one about the effect of strawberry production systems (low tunnel and open field) and pesticide application on population dynamics of two-spotted spider mite T. urticae, its natural enemies (N. floridana and predatory mites), and plant diseases, the experiment was performed in Inconfidentes-MG. The population of T. urticae attained the highest level in treatments with chemical control of pest, independently of the crop system, low tunnel or open field. The fungus N. floridana was observed late in both crop seasons, in treatments with and without inoculative releases, and has suggested that it might be a natural occurrence of the fungus. The highest prevalence of the fungus were observed in treatments with high densities of T. urticae. The predatory mites occurred naturally during the two crop seasons, and the most abundant species was Neoseiulus anonymus (Chant) (57.5%). The incidence of fungal plant diseases are greater in the open field than in low tunnel, however it seems that the crop system do not affect the new disease \"vermelhao\". The second study aimed to reveal the abiotic and biotic factors involved in the regulation of resting spores formation in the hosts T. urticae and T. evansi. The Brazilian isolate ESALQ1420 produced a large number of resting spores (51.5%) in T. urticae at a temperature 11 °C, photoperiod of 10L:14D, light intensity of 42-46 (?mol m-2s-1), on non-senescent plants. Small percentages of mites with resting spores (0-5 %) were found for the Norwegian isolate NCRI271/04 under the conditions tested, and very low percentages of resting spores (up to 1%) were observed in T. evansi infected by the Brazilian isolate ESALQ1421.The third study was therefore conducted phylogenetic analysis of isolates of N. floridana and develops efficient real-time PCR-based analysis for detection and quantification of N. floridana propagules from the soil. The phylogenic three showed that Neozygites is a fungal group far from other Entomophthoromycota and that N. floridana present high intra-specific variability. This data indicates that the isolates from different Tetranychus species may be in fact different Neozygites species, not described yet. We developed a real-time PCR probe for detection and quantification of N. floridana in the soil. This molecular probe was successful in quantifying N. floridana at relatively high DNA concentrations seeded into the soil.
Neozygites floridana é um importante inimigo natural de Tetranychus urticae em diversas culturas, incluindo morango. Nesta cultura tem havido uma mudança no sistema de produção, passando de cultivo em campo aberto para túnel baixo. Este novo sistema apresenta benefícios na produção de morango, no entanto pode aumentar problemas com ácaros fitófagos e algumas doenças fúngicas, consequentemente aumentando o uso de agrotóxicos. Para a integração de N. floridana no manejo de ácaros fitófagos em morango, existem ainda muitos aspectos importantes a serem conhecidos sobre a biologia, epizootiologia do fungo e efeito dos sistemas de cultivo sobre a sua prevalência em campo. Para isso três estudos foram realizados, sendo o primeiro estudo sobre o efeito de sistemas de produção de morango (túnel baixo e campo aberto) e da aplicação de agrotóxicos sobre a dinâmica populacional do acaro rajado T. urticae, seus inimigos naturais (N. floridana e ácaros predadores) e doenças de plantas, o experimento foi realizado em Inconfidentes-MG. A população de T. urticae atingiu altos níveis em tratamentos com controle químico de pragas, independente do sistema de cultivo, túnel baixo ou campo aberto. O fungo N. floridana foi observado no final de ambos os ciclos de cultivos, nos tratamentos com e sem liberações inoculativas, sugerindo que houve incidência natural do fungo. As maiores prevalências do fungo foram observadas em tratamentos com altas densidades de T. urticae. Os ácaros predadores ocorreram naturalmente durante os dois ciclos de cultivo, sendo Neoseiulus anonymus (Chant) a espécie mais abundante (57.51%). A incidência de doenças fúngicas foi maior em campo aberto do que em túnel baixo, no entanto parece que o sistema de cultivo não afetou a incidência da nova doença vermelhão. No segundo estudo objetivou-se conhecer os fatores abióticos e bióticos envolvidos na formação de esporos de resistência nos hospedeiros T. urticae e Tetranychus evansi. O isolado brasileiro ESALQ1420 produziu um grande número de esporos de resistência (51.5%) em T. urticae, a uma temperatura de 11 ° C, fotoperíodo de 10F:14E, intensidade de luz de 42-46 (?mol m-2s-1), em plantas senescentes. Pequenas percentagens de ácaros com esporos de resistência (0-5%) foram encontrados para o isolado Norueguês NCRI271/04 sob as condições testadas, e muito baixas percentagens de esporos de resistência (ate 1%) foram observados em T. evansi infectados pelo isolado brasileiro ESALQ1421. O terceiro estudo objetivou analisar filogeneticamente os isolados de Neozygites patogênicos a ácaros, e desenvolver ferramenta utilizando PCR em tempo real para a detecção e quantificação de propágulos de N. floridana a partir do solo. A arvore filogenética mostrou que Neozygites e um grupo de fungos distante dos demais Entomophthoromycota, e que estes fungos apresentaram alta variabilidade intraespecífica entre isolados de N. floridana. Estes resultados indicam que isolados provenientes de diferentes espécies hospedeiras do gênero Tetranychus podem ser de fato diferentes espécies de Neozygites não descritas ainda. Desenvolveu-se uma sonda molecular para detecção e quantificação de N. floridana no solo utilizando PCR em tempo real. Esta sonda foi eficiente na quantificação de N. floridana, em concentrações relativamente altas de DNA inoculado no solo.
4

Kara, Fatma Ebru Ay Recep. "Clofentezine, fenpyroximate ve amitraz ile seleksiyon yapılmış tetranychus urticae koch populasyonlarının direnç, çoklu direnç, direnç kalıtımının ve bazı enzim düzeylerinin belirlenmesi /." Isparta : SDÜ Fen Bilimleri Enstitüsü, 2008. http://tez.sdu.edu.tr/Tezler/TF01123.pdf.

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5

Khan, Inamullah. "Aspects of the biology of the ladybird beetle Stethorus vagans (Blackburn) (Coleoptera: Coccinellidae) /." View thesis, 2000. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20031103.132342/index.html.

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Hales, Lavinia Anne. "Genetics of sex ratio and other life history traits in the two-spotted spider mite (Tetranychus urticae Koch) /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487850665559541.

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7

Rethwisch, Michael D., Bradley J. Griffin, Jessica L. Grudovich, Jessica Hawpe, Krystyl Bolin, Shirley Plemmons, Ben Hayden, Marlo Barron, Alvin Lau, and Mark Reay. "Evaluation of various miticidal products for two-spotted spider mite, alfalfa caterpillar, and beet armyworm control in alfalfa." College of Agriculture, University of Arizona (Tucson, AZ), 2003. http://hdl.handle.net/10150/205398.

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"A number of products with miticidal activity were applied both in the spring and summer of 2002 to alfalfa in the Blythe, CA, area to evaluate their efficacy for twospotted spider mite (Tetranychus urticae) control. These two application periods differed in regards to presence of western flower thrips (Frankliniella occidentalis), a predator of spider mites. Western flower thrips populations were high in the spring but essentially absent during the period following the summer application, providing contrasting data for effects of western flower thrips interactions with many miticides for spider mite control. Miticides tested included those currently utilized for mite control in alfalfa hay production as well as a number of new and/or potential products for alfalfa hay. In the spring testing, most treatments had more spider mites than the untreated check at three days post treatment when western flower thrips were present and actively feeding on spider mites. Two fertilizer treatments that contained high amounts of sulfur also had more spider mites than the untreated check at three days post treatment, thought due to repellency of adult western flower thrips. Many of the treatments that had more spider mites than the check following the spring application are known to have thrips activity (Zephyr, Trilogy, Dimethoate, Lorsban, etc.). Fewer motile (adults and immatures, not eggs) spider mites than in the check were noted only from the Capture + Dimethoate 400, Capture, and the combination of the two Gowan numbered products (1528, 1549) at three days after treatment. Products that provided excellent (90%+) control throughout the duration of the summer part of the experiment included two numbered compounds from Gowan (1528 and 1549), Capture + Dimethoate 400, Danitol, Zephyr + Trilogy, and a numbered compound from Valent USA (V-1283). The wide disparity in the two data sets indicate that western flower thrips presence/absence should be considered as part of the decision making process for spider mite control. "
8

Yorulmaz, Sibel Ay Recep. "Tetranychus urticae (Acarina: teranychidae)'nin üç farklı insektisit-akarisit ile seleksiyonundan sonra çoklu direnç ve bazı enzim düzeylerinin incelenmesi /." Isparta : SDÜ Fen Bilimleri Enstitüsü, 2008. http://tez.sdu.edu.tr/Tezler/TF01124.pdf.

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9

Astudillo, Fernandez Aina. "Influence of the Allee effect and collective behaviour on population dynamics: the case of the two-spotted spider mite." Doctoral thesis, Universite Libre de Bruxelles, 2011. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209875.

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The Allee effect corresponds to a positive relationship between population size and individual fitness. This positive relationship can cause thresholds, that is, critical population sizes below which the population becomes extinct. For species submitted to the Allee effect, the formation and cohesion of groups is therefore crucial to survival. Animals can achieve this collective behaviour through local interactions. Each individual interacts locally with conspecifics and, at the scale of the group, a unity of behaviour emerges: the animals move together, rest in the same place, or choose the same habitat patch to settle on.

We use a combination of mathematical modelling and experimental work to study certain mechanisms of collective behaviour. In particular we assess the extent to which different individual interactions can induce collective patterns and thereby influence the dynamics of dispersal and settlement of populations. First, we study the collective settlement induced by the arresting effect of a marker secreted by conspecifics. Then, two potential mechanisms for collective movement are examined: following the conspecifics and following a trail laid by conspecifics. Finally, we integrate explicit mechanisms of dispersal behaviour in a dynamic model involving a set of interconnected populations. This allows the study of the interplay between collective movements and Allee effects at the scale of the metapopulation.

Our work is inspired by the lifestyle of the two-spotted spider mite, Tetranychus urticae, a phytophagous pest of recognised agricultural importance. These subsocial mites live in aggregates on the leaf surface, protected by a collectively spun silk web. Experimental evidence suggests that its population dynamics are subject to the Allee effect. Moreover, these mites show a tendency to migrate collectively, which makes them an appropriate biological model.
Doctorat en Sciences
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10

Brenner, Robert J. "Influence of Neonicotinoid Seed Treatment on Two Co-Occuring Arthropod Pests, Two-Spotted Spider Mite (Tetranychus urticae) and Western Flower Thrips (Frankliniella occidentalis)." Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/31549.

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Insecticidal neonicotinoid seed treatments in agriculture is a common insect pest management strategy. Seed treatments have systemic and residual toxicity, which are effective against target insect pests. However, effects on other arthropod pests is less straightforward. We evaluated the effects of a neonicotinoid seed treatment, thiamethoxam, on two soybean pests, herbivorous two-spotted spider mites (Tetranychus urticae Koch) and an omnivore and facultative predator of spider mite eggs, western flower thrips (Frankliniella occidentalis Pergande). We used greenhouse and laboratory experiments to evaluate thiamethoxam soybean seed treatments on spider mite densities and thrips omnivorous feeding behavior. Our results suggest seed treatment may encourage spider mite reproduction and influence thrips herbivory over egg predation when both resources are available. Implications of this study highlight the use of thiamethoxam soybean seed treatment as a potential contributor to increased spider mite populations, thrips reduced role as spider mite predator, and increased role as herbivorous pest.
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Books on the topic "Two-spotted spider mite":

1

Antonelli, Arthur L. Impact of insecticides on the spider mite destroyer and twospotted spider mite on red raspberries in Washington. Pullman, WA: Washington State University, College of Agriculture and Home Economics, Research Center, 1996.

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Aguilar-Piedra, Hugo Gerardo. Management for control of the twospotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) on azuki bean, Vigna angularis (Willd.) Ohwi and Ohashi, in Washington State. 1995.

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Sites, Robert William. Evaluation of systemic pesticides for use against hop aphids and twospotted spider mites, and interactions between C14-labeled aldicarb, hops, and hop pests. 1986.

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Book chapters on the topic "Two-spotted spider mite":

1

Gratwick, Marion. "Two-spotted spider mite on outdoor crops." In Crop Pests in the UK, 369–73. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-1490-5_74.

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Bruin, Jan, Tetsuo Gotoh, Maurice W. Sabelis, Steph B. J. Menken, and Wil E. van Ginkel. "Host-race formation in the two-spotted spider mite (Tetranychus urticae)." In Proceedings of the 8th International Symposium on Insect-Plant Relationships, 203–4. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-1654-1_67.

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Van Leeuwen, Thomas, John Vontas, Anastasia Tsagkarakou, and Luc Tirry. "Mechanisms of Acaricide Resistance in the Two-Spotted Spider Mite Tetranychus urticae." In Biorational Control of Arthropod Pests, 347–93. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2316-2_14.

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Herrmann, I., M. Berenstein, T. Paz-Kagan, A. Sade, and A. Karnieli. "Early detection of two-spotted spider mite damage to pepper leaves by spectral means." In Precision agriculture '15, 661–66. The Netherlands: Wageningen Academic Publishers, 2015. http://dx.doi.org/10.3920/978-90-8686-814-8_82.

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Afifi, Abd-Allah M., Ahamed Y. M. El-Laithy, Saied A. Shehata, and El-Sayed M. A. El-Saiedy. "Resistance of strawberry plants against the two-spotted spider mite, Tetranychus urticae (Acari: Tetranychidae)." In Trends in Acarology, 505–7. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-9837-5_85.

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Ignatowicz, S. "Inheritance of photoperiodic responses controlling diapause in the two-spotted spider mite, Tetranychus urticae Koch." In The Acari, 277–78. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3102-5_19.

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Tomczyk, A. "Changes in phenolic compounds in cucumber leaves infested by the two-spotted spider mite (Tetranychus urticae)." In Proceedings of the 8th International Symposium on Insect-Plant Relationships, 309–10. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-1654-1_99.

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Takafuji, Akio. "Variation in diapause characteristics and its consequences on population phenomena in the two-spotted spider mite, Tetranychus urticae Koch." In Insect life-cycle polymorphism, 113–32. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-1888-2_6.

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Hankins, S. D., and H. P. Hockey. "The effect of a liquid seaweed extract from Ascophyllum nodosum (Fucales, Phaeophyta) on the two-spotted red spider mite Tetranychus urticae." In Thirteenth International Seaweed Symposium, 555–59. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-2049-1_80.

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Taber, Douglass F. "Functionalization and Homologation of C-H Bonds." In Organic Synthesis. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199965724.003.0020.

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Justin Du Bois of Stanford University developed (J. Am. Chem. Soc. 2010, 132, 10202) a Ru catalyst for the stereoretentive hydroxylation of 1 to 2. John T. Groves of Princeton University effected (J. Am. Chem. Soc. 2010, 132, 12847) equatorial chlorination of the test substrate 3. Kenneth M. Nicholas of the University of Oklahoma found (J. Org. Chem. 2010, 75, 7644) that I2 catalyzed the amination of 5. Thorsten Bach of the Technische Universität München established (Org. Lett. 2010, 12, 3690) that the amination of 7 proceeded with significant diastereoselectivity. Phil S. Baran of Scripps/La Jolla compiled (Synlett 2010, 1733) an overview of the development of C-H oxidation. Tethering can improve the selectivity of C-H functionalization. X. Peter Zhang of the University of South Florida devised (Angew. Chem. Int. Ed. 2010, 49, 10192) a Co catalyst for the cyclization of 9 to 10. Teck-Peng Loh of Nanyang Technological University established (Angew. Chem. Int. Ed. 2010, 49, 8417) conditions for the oxidation of 11 to 12. Jin-Quan Yu, also of Scripps/La Jolla, effected (J. Am. Chem. Soc. 2010, 132, 17378) carbonylation of methyl C-H of 13 to give 14. Sunggak Kim, now also at Nanyang Technological University, established (Synlett 2010, 1647) conditions for the free-radical homologation of 15 to 17. Gong Chen of Pennsylvania State University extended (Org. Lett. 2010, 12, 3414) his work on remote Pd-mediated activation by cyclizing 18 to 19. Many schemes have been developed in recent years for the oxidation of substrates to reactive electrophiles. Gonghua Song of the East China University of Science and Technology and Chao-Jun Li of McGill University reported (Synlett 2010, 2002) Fe nanoparticles for the oxidative coupling of 20 with 21. Zhi-Zhen Huang of Nanjing University found (Org. Lett. 2010, 12, 5214) that protonated pyrrolidine 25 was important for mediating the site-selective coupling of 24 with 23. Y. Venkateswarlu of the Indian Institute of Chemical Technology, Hyderabad, was even able (Tetrahedron Lett. 2010, 51, 4898) to effect coupling with a cyclic alkene 28. AB3217-A 32, isolated in 1992, was shown to have marked activity against two spotted spider mites. Christopher R. A. Godfrey of Syngenta Crop Protection, Münchwilen, prepared (Synlett 2010, 2721) 32 from commercial anisomycin 30a. The key step in the synthesis was the oxidative cyclization of 30b to 31.

Conference papers on the topic "Two-spotted spider mite":

1

"Smartphone-based Tool for Two-Spotted Spider Mite Detection in Strawberry." In 2021 ASABE Annual International Virtual Meeting, July 12-16, 2021. American Society of Agricultural and Biological Engineers, 2021. http://dx.doi.org/10.13031/aim.202100558.

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Adesanya, Adekunle W. "Mechanisms of resistance to mite growth regulators in the two-spotted spider mite,Tetranychus urticae." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.115337.

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Suzuki, Takeshi. "RNA interference by soaking in the two-spotted spider mite,Tetranychus urticae." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.114326.

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Choe, Ho Jeong. "Spatial distribution analysis of two spotted spider mite in strawberry greenhouses using geostatistics." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.112398.

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Bryon, Astrid. "Carotenoids and diapause in the two-spotted spider mite: Lessons from an albino mutant." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.92912.

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Farooq, Muhammad. "Temperature dependent life table parameters and predatory potential of a stigmaeid mite,Agistemus buntexagainst two spotted spider mite,Tetranychus urticae." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.118299.

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Im, Ye Jin. "Development of sequential sampling plan for two spotted spider mite in strawberry greenhouses under consideration of spatial location." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.112372.

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