Relevant bibliographies by topics / Potatoes Ecology

Academic literature on the topic 'Potatoes Ecology'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Potatoes Ecology"

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Dornan, Andrew P., and Jeff G. Stewart. "POPULATION DYNAMICS OF THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (HÜBNER)(LEPIDOPTERA: PYRALIDAE) ATTACKING POTATOES IN PRINCE EDWARD ISLAND." Canadian Entomologist 127, no. 2 (April 1995): 255–62. http://dx.doi.org/10.4039/ent127255-2.

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AbstractThe population dynamics of the European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Pyralidae), were documented on potatoes grown in Prince Edward Island (P.E.I.) from 1990 to 1992. By comparing degree-day accumulations above 10°C, both first occurrence and peak flights of male adults occurred earlier than elsewhere in North America. Because potatoes in P.E.I. are attacked earlier and over a longer period of time than potatoes grown in other regions, the insect is an important pest of potatoes in P.E.I. The correlation between peak numbers of male adults caught in pheromone traps and egg masses on potato plants was not significant (p = 0.22). However, the correlation between egg masses per potato stalk and larvae per potato stalk was significant (p = 0.003). Trapping adults and monitoring potato plants for the presence of egg masses during the period from 250 to 500 degree-days appears to be a reliable way to determine the presence of adults and the potential impact of larvae on yield of potatoes.
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Jaques, Robert P., and Daniel R. Laing. "EFFECTIVENESS OF MICROBIAL AND CHEMICAL INSECTICIDES IN CONTROL OF THE COLORADO POTATO BEETLE (COLEOPTERA: CHRYSOMELIDAE) ON POTATOES AND TOMATOES." Canadian Entomologist 120, no. 12 (December 1988): 1123–31. http://dx.doi.org/10.4039/ent1201123-12.

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AbstractThe control of the Colorado potato beetle, Leptinotarsa decemlineata (Say), by formulations of Bacillus thuringiensis (Berliner) (B.t.) and other microbial agents and chemical insecticides was assessed in field plots of potatoes and tomatoes over a 5-year period. Applications of formulations of thuringiensin, the beta exotoxin of B.t., and of B.t. var. son diego (B.t.sd.) to potatoes reduced numbers of larvae of the potato beetle compared with the nontreated check and resulted in yields significantly greater than from the check plots and, in most cases, similar to yields from plots treated with carbofuran. Treatment of tomatoes with B.t.sd. reduced populations of larvae of the Colorado potato beetle compared with the nontreated check and increased yield of nondamaged fruit from plots. An initial application of carbofuran to potatoes or permethrin to tomatoes followed by applications of thuringiensin or B.t.sd. protected potatoes or tomatoes as well as did the chemical insecticide used alone in a treatment program. Applications of preparations of B.t. var. kurstaki or spores of the fungus Beauveria bassiana (Balsamo) Vuillemin or the microsporidium Vairimorpha necatrix (Kramer) did not reduce populations of the beetle.
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Lee, Kyung-Jun, Raveendar Sebastin, Gyu-Taek Cho, Munsup Yoon, Gi-An Lee, and Do-Yoon Hyun. "Genetic Diversity and Population Structure of Potato Germplasm in RDA-Genebank: Utilization for Breeding and Conservation." Plants 10, no. 4 (April 12, 2021): 752. http://dx.doi.org/10.3390/plants10040752.

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Potato (Solanum tuberosum L.) is an important staple food and economic crop in many countries. It is of critical importance to understand the genetic diversity and population structure for effective collection, conservation, and utilization of potato germplasm. Thus, the objective of the present study was to investigate the genetic diversity and population structure of potato germplasm conserved in the National Agrobiodiversity Center (NAC) of South Korea to provide basic data for future preservation and breeding of potato genetic resources. A total of 24 simple sequence repeat (SSR) markers were used to assess the genetic diversity and population structure of 482 potato accessions. A total of 257 alleles were detected, with an average of 10.71 alleles per locus. Analysis of molecular variance showed that 97% of allelic diversity was attributed to individual accessions within the population, while only 3% was distributed among populations. Results of genetic structure analysis based on STRUCTURE and discriminant analysis of principal components revealed that 482 potato accessions could be divided into two main subpopulations. Accessions of subpopulation 1 mainly belonged to cultivars and breeding lines. Accessions of subpopulations 2 basically corresponded to wild relatives of potatoes. Results of this study provide useful information for potato improvement and conservation programs, although further studies are needed for a more accurate evaluation of genetic diversity and phenotypic traits of potatoes.
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Kardile, Hemant Balasaheb, Solomon Yilma, and Vidyasagar Sathuvalli. "Molecular Approaches to Overcome Self-Incompatibility in Diploid Potatoes." Plants 11, no. 10 (May 17, 2022): 1328. http://dx.doi.org/10.3390/plants11101328.

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There has been an increased interest in true potato seeds (TPS) as planting material because of their advantages over seed tubers. TPS produced from a tetraploid heterozygous bi-parental population produces non-uniform segregating progenies, which have had limited uniformity in yield and quality in commercial cultivation, and, thus, limited success. Inbreeding depression and self-incompatibility hamper the development of inbred lines in both tetraploid and diploid potatoes, impeding hybrid development efforts. Diploid potatoes have gametophytic self-incompatibility (SI) controlled by S-locus, harboring the male-dependent S-locus F-box (SLF/SFB) and female-dependent Stylar-RNase (S-RNase). Manipulation of these genes using biotechnological tools may lead to loss of self-incompatibility. Self-compatibility can also be achieved by the introgression of S-locus inhibitor (Sli) found in the self-compatible (SC) natural mutants of Solanum chacoense. The introgression of Sli through conventional breeding methods has gained much success. Recently, the Sli gene has been cloned from diverse SC diploid potato lines. It is expressed gametophytically and can overcome the SI in different diploid potato genotypes through conventional breeding or transgenic approaches. Interestingly, it has a 533 bp insertion in its promoter elements, a MITE transposon, making it a SC allele. Sli gene encodes an F-box protein PP2-B10, which consists of an F-box domain linked to a lectin domain. Interaction studies have revealed that the C-terminal region of Sli interacts with most of the StS-RNases, except StS-RNase 3, 9, 10, and 13, while full-length Sli cannot interact with StS-RNase 3, 9, 11, 13, and 14. Thus, Sli may play an essential role in mediating the interactions between pollen and stigma and function like SLFs to interact with and detoxify the S-RNases during pollen tube elongation to confer SC to SI lines. These advancements have opened new avenues in the diploid potato hybrid.
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Novikova, Irina, Vladislav Minin, Julia Titova, Anton Zakharov, Irina Krasnobaeva, Irina Boikova, and Evgeniy Murzaev. "New Polyfunctional Biorationals Use to Achieve Competitive Yield of Organic Potatoes in the North-West Russian Ecosystem." Plants 11, no. 7 (April 1, 2022): 962. http://dx.doi.org/10.3390/plants11070962.

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To increase the organic potato yield, it is necessary to provide the crop with sufficient nutrients and effective means of biocontrol the diseases. The research goal was to characterize the biorationals’ efficacy to achieve competitive organic potatoes’ yield under various weather conditions. A 4-year trial was carried out in the Leningrad region using Udacha variety potatoes. The tests used liquid forms of new polyfunctional biologicals Kartofin based on highly active Bacillus subtilis I-5-12/23 and organic fertilizer BIAGUM obtained from poultry manure by aerobic fermentation in a closed biofermenter. Significant stimulation in plant growth and development to the flowering phase regardless of the hydrothermal conditions of the growing season was noted. The stimulating effect was determined by the combined use of biorationals pro rata to BIAGUM dose. Kartofin biologicals and BIAGUM almost doubled the potato tubers’ yield compared to the control, regardless of the growing season conditions. At the flowering phase, the biological efficacy in potato fungal diseases incidence and development was near 90% under optimal and 50–75% under drought hydrothermal conditions. At the end of vegetation, the efficiency in fungal diseases incidence and development made up 45–65% under optimal and 45–70% under dry conditions. BIAGUM effectiveness in reducing disease development reached 45–50% regardless of growing season conditions.
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Lax, Paola, Juan C. Rondan Dueñas, Javier Franco-Ponce, Cristina N. Gardenal, and Marcelo E. Doucet. "Morphology and DNA sequence data reveal the presence of Globodera ellingtonae in the Andean region." Contributions to Zoology 83, no. 4 (October 3, 2014): 227–43. http://dx.doi.org/10.1163/18759866-08304002.

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Potato cyst nematodes, G. rostochiensis and G. pallida, are the most economically important nematode pests of potatoes worldwide and are subject to strict quarantine regulations in many countries. Globodera ellingtonae was recently described from Oregon (USA), with its host-plant in the field being still unknown. Roots of Andean potatoes from the North of Argentina have been found attacked by this nematode, providing further evidence that this is a potato cyst nematode species, along with G. pallida and G. rostochiensis. New information about morphological, biological and molecular aspects of G. ellingtonae is provided for diagnostic purposes. The Argentine population showed morphological differences from specimens from Oregon; therefore, new diagnostic characters were defined to differentiate G. ellingtonae from its closest species. The Hsp90 gene was shown to be a good diagnostic marker for discriminating the three PCN species. The importance of the detection of G. ellingtonae on potatoes in the Andean region is not restricted to a regional level, since the nematode is also present in USA. This species can pose a serious problem to potato crop, especially when infected tubers are used as seeds. The distribution in the South American Andes is likely to extend the currently known distribution areas because cysts are passively transported. There is a need to evaluate the possible damage it may cause to potato crops. Morphological and molecular diagnoses conducted in this work provide fundamental information for the protection of potato crops not only in those countries in the Americas where the species has already been detected, but also worldwide.
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Hansen, James D. "Acoustical Detection of the Sweetpotato Weevil (Coleoptera: Curculionidae) in Sweet Potato2." Journal of Entomological Science 28, no. 4 (October 1, 1993): 453–61. http://dx.doi.org/10.18474/0749-8004-28.4.453.

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Ultrasensitive acoustical equipment was used to detect larvae of the sweetpotato weevil, Cylas formicarius elegantulus (Summers) (Coleoptera: Curculionidae), in the sweet potato, Ipomoea batatas (L.). Methods of expressing results were evaluated with per cent audible as the best indicator of larval presence. Sound from moderately infested sweet potatoes (8 to 20 weevils/sweet potato) varied considerably even though infestation rates above 60 weevils/sweet potato resulted in sound throughout most of the observation period. Infested sweet potatoes were detectable after two weeks of weevil development; maximum values were observed a month after infestation. However, the substantial variation of the observation data precluded descriptive mathematical models based on infestation rate or weevil development. Disease processes also caused signals that were indistinguishable from those made by sweetpotato larvae. Other factors that influence detectability are also discussed.
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Hlisnikovský, Lukáš, Ladislav Menšík, and Eva Kunzová. "The Effect of Soil-Climate Conditions, Farmyard Manure and Mineral Fertilizers on Potato Yield and Soil Chemical Parameters." Plants 10, no. 11 (November 16, 2021): 2473. http://dx.doi.org/10.3390/plants10112473.

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If available to farmers, potatoes represent a crop classically fertilized with farmyard manure in the Czech Republic. At the same time, potatoes are a crop sensitive to soil–climate conditions. We evaluated the effect of cattle manure (FYM), manure and mineral nitrogen (FYM + N1, FYM + N2), manure and mineral fertilizers (FYM + N1PK, FYM + N2PK, FYM + N3PK) application and the effect of three soil-climatic conditions (Caslav—maize production area with degraded Chernozem, Ivanovice—maize production area with Chernozem, Lukavec—potatoes production area with Cambisol) over four years (2016–2019) on potatoes yield and soil chemical properties. Of all the factors, yields were most affected by location. Lukavec provided the highest average yields (37.2 t ha−1), followed by Ivanovice (23.5 t ha−1) and Caslav (15.5 t ha−1). The second most important factor was the climatic conditions of the year. Fertilization was the third most important parameter. FYM significantly increased yields compared to Control, but applied alone cannot cover the needs of potatoes. Similarly, the application of FYM and N increases yields, but for the highest yields, it is best to apply FYM + NPK (80 kg ha−1 N). Co-application of FYM and mineral N fertilizers mitigates the negative impact of mineral N on soil pH.
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Alyokhin, Andrei V., and David N. Ferro. "MATING ABILITY OF COLORADO POTATO BEETLE (COLEOPTERA: CHRYSOMELIDAE) MALES FED TRANSGENIC POTATO (SOLANACEAE) FOLIAGE." Canadian Entomologist 131, no. 4 (August 1999): 539–40. http://dx.doi.org/10.4039/ent131539-4.

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Colorado potato beetle, Leptinotarsa decemlineata (Say), is an important pest of potatoes Solanum tuberosum L. worldwide. To control this insect, commercial growers in North America may increasingly rely on planting transgenic potatoes that express the Bacillus thuringiensis (Berliner) subsp. tenebrionis Cry3A toxin in their foliage (Whalon and Ferro 1998). Because persistence and distribution of the toxin in these plants are maximized (Perlak et al. 1993), there is strong selection pressure towards development of resistance to the Cry3A toxin in beetle populations (Ferro 1993). One strategy proposed to delay development of resistance is to provide spatial refugia of nontransgenic potatoes to support populations of susceptible individuals sufficient to curtail matings between resistant individuals (Whalon and Ferro 1998). Therefore, it is important that susceptible beetles moving into the transgenic crop from refugia can successfully mate with local resistant beetles. Wierenga et al. (1996) reported that adult beetles that fed continuously on transgenic potatoes since eclosion from pupae did not display any reproductive activity, but that successful reproduction was eventually observed if beetles fed on nontransgenic foliage later. Under field conditions, however, it is more likely that susceptible beetles emerging from pupae in refugia will feed on nontransgenic potatoes before, not after, moving onto transgenic plants. We have recently discovered that under such circumstances female beetles remain reproductive, but with significantly reduced fecundity relative to control females continuously fed on nontransgenic foliage (Alyokhin and Ferro 1999). No such data are currently available for male beetles.
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Bhattarai, Shuvash, Patrick P. J. Haydock, Matthew A. Back, Martin C. Hare, and William T. Lankford. "Interactions between the potato cyst nematodes, Globodera pallida, G. rostochiensis, and soil-borne fungus, Rhizoctonia solani (AG3), diseases of potatoes in the glasshouse and the field." Nematology 11, no. 4 (2009): 631–40. http://dx.doi.org/10.1163/156854108x399173.

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Abstract This is the first report of a positive interaction between the nematode Globodera pallida and Rhizoctonia solani diseases of potato, and is an important step in the general understanding of interactions between nematodes and fungal diseases. One glasshouse and two field experiments were performed to investigate interactions between G. pallida or G. rostochiensis and R. solani diseases of potatoes. The glasshouse experiment investigated the independent and combined effects of G. pallida or G. rostochiensis and R. solani on the growth of plants and R. solani disease severity. In the glasshouse experiment the combined effects of G. pallida with R. solani or G. rostochiensis with R. solani showed greater R. solani diseases of potatoes compared with only R. solani. The field experiments examined the development of R. solani diseases on potatoes grown in soil with potato cyst nematode population densities ranging from eight to 140 and four to 50 eggs (g soil)–1 in the years 2006 and 2007, respectively. The 2006 field experiment revealed a clear positive relationship between initial population densities of G. pallida and the incidence of stolons infected by R. solani, subsequent stolon pruning and stem canker. In both field experiments a clear positive relationship was found between densities of nematodes within the potato roots and the incidence of infected stolons, stolon pruning and stem canker. Nematicide applied together with R. solani in the 2007 field experiment reduced the effect of G. pallida on the incidence and severity of diseases caused by R. solani.
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Dissertations / Theses on the topic "Potatoes Ecology"

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Azerefegne, Ferdu. "The sweet potato butterfly Acraea acerata in Ethiopia : ecology and economic importance /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5701-7.pdf.

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Verbylaitė, Violeta. "Bulvių veislių derlingumo ir juslinių savybių palyginimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2007. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2007~D_20070816_153048-90084.

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Darbo objektas – bulvės, užaugintos chemizuotame ir ekologiniame fonuose Marijampolės apskrityje, Vilkaviškio rajone, Bambinių kaime. Darbo tikslas - Palyginti bulvių veisles, išaugintas chemizuotame(tręštame mineralinėmis trašomis) ir ekologiniame (tręštame organinėmis trąšomis) fonuose derliaus dydį ir juslines savybes. Darbo metodas. Tyrimai buvo atlikti 2006 m. balandžio - rugsėjo mėnesiais. Sėkla buvo apie 20 d. padaiginta šviesioje bei šiltoje patalpoje. Fonas paruoštas lauko bandymams. Įdirbtus laukus pavasarį ekologiniame fone tręšta tik mėšlu, o chemizuotame fone patręšta specialomis subalansuotomis bulvėms skirtomis trąšomis. Stebėtas bulvių vystymasis ir augimas visą vegetaciją. Tyrimai buvo vykdomi lauko bandymų metodu..Baigus vegetacijai, bulvės buvo kasamos ir sveriamos. Nustatyta 1 bulvių kero masė g, bei suskaičiuotas gumbų skaičius vnt. Iškasta kiekvienos veislės po 10 bulvių kerų. Gumbų masė nustatyta svėrimo metodu. 2007m. vasario mėn. visoms bulvių veislėms buvo atlikta juslinė analizė. Ekologiškai ir chemizuotai augintų bulvių gumbai virti vienodomis sąlygomis: kiekviena bulvių veislė atskiruose puoduose, su lupyna, be druskos. Virimo trukmė apie 30 min. Degustacijos metodas aprobuotas ir taikomas LŽI selekcininkų, išvedant veisles. Tyrimo rezultatai parodė, kad tręšiant mineralinėmis trąšomis bulves, derlingiausia buvo ‘Vinetos‘ veislė, o tręšiant tik mėšlu bulves, derlingiausia buvo ‘Vitaros‘, Quartos‘ veislės. Geriausiu skoniu pasižymėjo... [toliau žr. visą tekstą]
The object of labour- the potatoes which has been raise up in chemistry and ecology setting in Marijampole District of Vilkaviskis in Bambinys village. The objective of labour- to compare the harvest size and quality of taste of the potatoes breeds which has been raised up in intense and chemistry setting. Method of work-the Research has been done in April-September of 2007. The seed. was germinate about 20 days at light and worm premises. The set was prepared for field experiment. In a spring the cultivate fields has been fertiled ecology set just by dung and in chemistry set just by special fertile which was balanced to potatoes. Has been observe the potatoes evolution and vegetation. The research has been done by the outdoor experiment. At the end of vegetation the potatoes been mined and weight. Was maked the weigth of one potatoes scrub (g) and counted unite of scrubs. From every breed was mined 10 unit of scrubs. The tubers weight determined by the weight method. In February of 2007 to every potatoes strains has been done savour. The tubers which has been raised up in ecology and intense setting been boiled on the same conditions: the each potatoes breed had boiled in separate pots with skin and without salt. The boil duration was about half an hour. The method of savour been created and apllyed by the LZI Selectors to do selections of breeds. The results of experiment showed that when potatoes been raised up intense the mostly harvest been ‘Vinetos’ Strain... [to full text]
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Rožėnaitė, Liuda. "Trąšų įtaka vidutinio ankstyvumo bulvių ‘Laura’ kokybei ir derliui." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110601_105910-26943.

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Magistro darbe tiriama trąšų įtaka vidutinio ankstyvumo bulvių ‘Laura’ kokybei ir derliui. Darbo objektas – bulvės, užaugintos chemizuotame ir ekologiniame fonuose, Šiaulių apskrityje, Radviliškio rajone, Raudondvario gyvenvietėje.. Darbo tikslas – palyginti mėšlo, komposto, biohumuso, ekologiškų trąšų „Activit“ ir mineralinių sintetinių trąšų „YARA MILA“ įtaką vidutinio ankstyvumo bulvėms ‘Laura’. Darbo metodai – LŽŪU Aplinkotyros laboratorijoje nustatyti elektrocheminiai (rūgštingumas – šarmingumas (pH), absoliutusis redokso potencialas (rH) ir savitasis elektrinis laidis(γ)) bei cheminiai (C vitamino kiekis) rodikliai. Skaičiuojami bulvių gumbai, stiebų aukštis ir skaičius, bulvių derlius. Visos įterptos trąšos prilygintos prie vienodo azoto kiekio (30 kg/ha). Tyrimų duomenys apdoroti matematiniais – statistiniais metodais. Duomenų grupavimui ir statistinei jų analizei atlikti buvo naudota kompiuterinė Microsoft Excel programa. Darbo rezultatai. Atlikus tyrimus įvertinta trąšų įtaka vidutinio ankstyvumo bulvėms ‘Laura’ ir gauti tokie rezultatai: bulvių derlius, gumbų skaičius, stiebų aukštis, stiebų skaičius didžiausias buvo tręšiant bulves sintetinėmis mineralinėmis trąšomis „YARA MILA“. Lyginant tik ekologiškas trąšas, didžiausias derlius, gumbų skaičius, stiebų skaičius buvo tręšiant ekologiškomis trąšomis „Activit“, mažiausias derlius gautas tręšiant mėšlo kompostu. Žemiausi stiebai gauti tręšiant biohumusu, stiebų skaičius patikimai mažesnis buvo kompostu tręštų... [toliau žr. visą tekstą]
Master's thesis investigated the influence of fertilizer medium early potatoes 'Laura' quality and yields. The object of work - potatoes grown in chemical and organic fertilization, in Radviliškis district, Raudondvaris village. The objective of work - the manure, compost, biohumus, organic fertilizer "Activity " and synthetic mineral fertilizers “YARA MILA" on medium early potatoes 'Laura'. Method of work - in LŽŪU Environmental Laboratory was observed electrochemical (acidity -alkalinity (pH), the absolute redox potential (rH) and electrical conductivity (γ)) and chemical (C vitamin content) characteristics. Calculating the potato tuber, stem heigh and number, and potato yield. All fertilizers equate at equal quantity of nitrogen (30 kg / ha). Research data processing mathematics - statistical methods. Data grouping and the statistical analysis was used in Microsoft Excel computer program. Results of work – investigations to assess the influence of fertilizer medium early potato ‘Laura’ and the following results: potato yield, tuber number, stalk height, stalk number was the largest potatoes fertilized with the mineral synthetic fertilizers “YARA MILA”. Compared the organic fertilizer only, the maximum yield, tuber number, stem density was fertilized with organic fertilizer “Activit”, the lowest yield was obtained due to the application of manure compost. The lowest stem was fertilized with biohumus, stem density significantly lower in compost fertilized potato... [to full text]
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Garbenis, Vaidotas. "Biologinių ekstraktų, tinkamų Kolorado vabalo bulvių pasėliuose kontrolei, tyrimai." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20090114_154843-26644.

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Darbo objektas – ekologiškai auginamos bulvės, kuriose pasireiškia kolorado vabalai. Darbo tikslas – įvertinti pušų ir gvazdikėlių ekstraktų poveikį kolorado vabalams bulvių pasėliuose. Darbo metodai – tyrimas buvo vykdomas 2007 m.. Bulvių sėkla daiginta 20 dienų šviesioje ir šiltoje patalpoje. Bandymas buvo įrengtas sodo sklypelyje. Pavasarį žemė įdirbta kastuvu. Mėšlas įterptas kastuvu 40 t ha-1 norma. Bulvių veislė „Rosela“. Pasodinta rankomis išmėtant bulves į padarytas vagutes. Bandymo bulvės buvo suskirstytos po dvi vagas purkšti ekstraktais, ir kontrolei. Purkšta pušų ir gvazdikėlių ekstraktų tirpalais. Dėl meteorologinių sąlygų (lietaus) bulvės jau buvo 10 – 15 cm kai pasirodė pirmieji kolorado vabalai. Po purškimų buvo stebima ar sumažėjo kolorado vabalų ir vertinama koks ekstraktas labiausiai paveikė kolorado vabalus. Nukasus bulves jų gumbai buvo sveriami. Nustatyta vidutinė vieno bulvių kero gumbų masė gramais, bei vidutinis gumbų skaičius vienetais. Purškiant buvo naudojami skydai, kad apsaugoti kitus variantus. Gumbų masė nustatyta svėrimo metodu. Purkštų pušų ir gvazdikėlių ekstraktų tirpalais bulvių derlius buvo lyginamas su kontroliniu variantu. Prieš pradedant vykdyti tyrimus, gegužės mėnesį buvo bandoma, kurią koncentraciją pasirinkti tolimesniams tyrimams (dėl vietos stokos ir bandymų vykdymo sudėtingumo). Preliminarūs tyrimai buvo atliekami dvejose vietose: Vokėje ir Šilalėje. Prieita nuomonės, kad 1% koncentracijos tirpalai mažai efektingi. Tuo tarpu... [toliau žr. visą tekstą]
Object of work – cultivation of ecologic potatoes, in which was found colorado beetles. Purpose of work – to estimate pine and clove extracts influence for pest (colorado beetles) into potatoes crops. Methods of work – the research had been conducting at 2007 y.. The seed of potatoes was cultivating in brightly and warm place for twenty days. The test was made in plot of garden. The soil was diged by spade on springtime. Manure was spread by spade 40 t. to hectare norm. The sort of potatoes „Rosela“. The potatoes was plant into furrows by hands. The researching potatoes was plant into to furrow, for sprinkling by extracts and for control. The potatoes was sprinkled by pine and clove extracts. Because of rain potatoes already was 10-15 cm. high, when appear first pests. After sprinkling was looking, if populiation of insects decrease, and testing which of extratcs was more effective. After potaoes gathering, it was weigh. Was find out a average weight of one potatoes growth bush, and average number of potatoes into bush. Was used screen to protect other rows of potato. The weight of lumps was found by weigh method. The harvest of sprinkled potatoes was compare with control rows. Before tests, was testing which concentration of extract to choose for research ( because of shortage of time, and complication of research). The research have been done in to place: Voke and Silale. I come to concliusion that 1% concentration extract aren‘t efective... [to full text]
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Phillips, Scott Lee. "The ecology and epidemiology of potato variety mixtures in organic potato production." Thesis, University of Reading, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428315.

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Malone, James. "Interactions of the fungicide 2-aminobutane with potato tubers." Thesis, University of Edinburgh, 1987. http://hdl.handle.net/1842/28529.

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A synthetic route to 2-aminobutane (2-AB) was developed, which enabled the synthesis of specifically and uniformly 14C labelled 2-AB to be carried out. 14C labelling was employed as a means of detecting 2-aminobutane in tuber tissue samples. An analytical technique, based on acid extraction and scintillation counting, was developed for the determination of 2-AB residues in potato tubers. This allowed studies to be carried out on various factors influencing the efficiency of fumigation of potato tubers with 2-aminobutane. Using C 2-AB and a specially constructed small scale fumigation chamber, an investigation into the absorption and penetration of 2-AB into tubers was undertaken. The rate and extent of 2-AB absorption were studied, and also the effect of initial fumigant concentration and length of exposure period, on the final 2-AB residues in tubers. The depth of penetration was shown to be limited to the first 1 cm of tissue indicating that after initial absorption, the amine is firmly bound at or near the tuber surface. Thin layer chromatography of extracts from fumigated tubers,provided evidence which suggested that 2-AB is not metabolised by the tubers during the storage period. Damaged tubers were shown to absorb higher levels of 2-AB, and the effect of wound healing at different temperatures, prior to fumigation, was demonstrated. The preferential uptake of 2-aminobutane through tuberlenticels was highlighted as a possible cause of tuberto tuber variation in 2-AB residues. Studies showed that there was no appreciable loss of 2-AB from fumigated tubers during the storage period, and that transfer of 2-AB from tuber to tuber during air recirculation was very limited. The absorption of 2-AB by soil, straw and wood,was examined and identified as a likely sink for the amine fumigant, and this could contribute to the low 2-AB residues recorded for some commercial fumigations. A comparison of the antifungal activity of the optical isomers of 2-aminobutane, confirmed that the R-(-)- enantiomer was more active than the corresponding S-(+)- isomer, or racemic mixture, against the fungi responsible for gangrene and skin spot in potato tubers.
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Joshi, Samudra Lal. "Ecology and management of the red ant Dorylus orientalis Westwood in Nepal." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300969.

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Rossi, Fabrício. "Cultivares para o sistema orgânico de produção de batata." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-23062009-085328/.

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A crescente demanda por batata e outras hortaliças cultivadas organicamente no Brasil representa uma importante oportunidade e um desafio para os produtores orgânicos. Na atualidade, é limitado o esforço de pesquisa enfocando fertilização, adaptação de cultivares e manejo de pragas e doenças para sistemas orgânicos de cultivo da batata. Em geral, a produtividade na produção orgânica de batata é baixa em comparação a obtida no sistema convencional, devido à cultura estar sujeita à inúmeras pragas, doenças e distúrbios fisiológicos. Como não existem no mercado cultivares adaptadas especificamente ao sistema orgânico, os produtores utilizam cultivares européias e norte-americanas desenvolvidas para o sistema convencional de cultivo. O objetivo deste estudo foi avaliar, sob sistema de cultivo orgânico, cultivares nacionais e estrangeiras desenvolvidas para o cultivo convencional, quanto ao potencial produtivo e qualidade, em condições de campo, sujeitas ao ataque de pragas e doenças. Os experimentos foram conduzidos, em 2007 e 2008, em dois locais: a) Estação Experimental Agroecológica do Pólo Regional do Leste Paulista/APTA, em Monte Alegre do Sul - SP, b) Sítio Orgânico Pereiras, em Socorro - SP. O delineamento experimental adotado foi em blocos ao acaso com quatro repetições. Os tratamentos constaram das cultivares Agata, Apuã (IAC-5977), Aracy (IAC-2), Asterix, Caesar, Catucha (Epagri-361), Cupido, Éden, IAC Aracy Ruiva, Itararé (IAC-5986), Melody, Monte Alegre 172, Novella e Vivaldi, além dos clones avançados IAC 6090 (Ibituaçú), APTA 16.5, APTA 15.20 e APTA 21.54. Em cada experimento foram incluídas, pelo menos, 10 cultivares. As demais cultivares e clones avançados foram incluídos, pelo menos, em um experimento. Foram avaliados os seguintes parâmetros: produtividade total e comercial, números total e comercial de tubérculos, teor de matéria seca, açúcares redutores e totais, resistência à requeima (Phytophthora infestans) e à pintapreta (Alternaria solani). Em 2007, em Monte Alegre do Sul, as cultivares Apuã (14,32 t ha-1), Monte Alegre 172 (13,44 t ha-1), e o clone Ibituaçú (12,75 t ha-1) apresentaram os rendimentos mais elevados. No mesmo ano, em Socorro, Ibituaçú (21,27 t ha-1) apresentou o maior rendimento entre os genótipos avaliados. Em 2008, em Monte Alegre do Sul, os clones APTA 16.5 (24,25 t ha-1), APTA 21.54 (23,21 t ha-1) e Ibituaçú (20,19 t ha-1), e as cultivares Cupido (18,03 t ha-1), Apuã (17,08 t ha-1), Itararé (16,66 t ha-1), e Monte Alegre 172 (16,18 t ha-1) mostraram as maiores produtividades. No mesmo ano, em Socorro, APTA 16.5 (21,02 t ha-1), APTA 21.54 (19,28 t ha-1), Ibituaçú (19,88 t ha-1), e Apuã (18,72 t ha-1) mostraram excelente desempenho para rendimento. Os teores de matéria seca e de açúcares redutores para todos os genótipos avaliados mostraram, respectivamente, valores maiores e menores em relação aos encontrados na literatura. APTA 16.5, Apuã, Aracy, Aracy Ruiva, Éden, Ibituaçú e Monte Alegre 172 apresentaram de moderado a elevado nível de tolerância à pinta-preta, apresentando poucos ou ausência de sintomas da doença. Apuã, Aracy, Catucha, Ibituaçú e Monte Alegre 172 mostraram elevado nível de resistência à requeima.
An increasing demand for organic potato and other vegetable crops in Brazil represent a considerable opportunity and a challenge for organic growers. So far, limited research has been conducted on organic potato production in Brazil pertaining to fertilization, cultivar adaptation, and pest management for organic potato systems. Yields in organic potato production are usually lower than in conventional production systems, because the crop is subject to many pests and physiological disorders. Furthermore, potato cultivars adapted to organic systems are unavailable in the market. Thus, European and North American cultivars developed for conventional crops that have high yielding potential and tolerance to the most limiting diseases and physiological disorders are used by the organic growers. The aim of this study was to evaluate under organic production on-farming conditions, potato cultivars bred in Brazil and abroad adapted for conventional growing systems, in terms of yield potential and qualities. The experiments were conducted in 2007 and 2008, in two locations: a) Agro-ecological Experimental Station of the Polo Regional do Leste Paulista/APTA, in Monte Alegre do Sul - SP County; b) Pereiras agro-ecological farm, Socorro-SP County. A randomized block experimental design was adopted with four replicates. The treatments consisted of the cultivars Agata, Apuã (IAC-5977), Aracy (IAC-2), Asterix, Caesar, Catucha (Epagri- 361), Cupido, Éden, IAC Aracy Ruiva, Itararé (IAC-5986), Melody, Monte Alegre 172, Novella, and Vivaldi, in addition to the advanced clones IAC 6090 (Ibituaçú), APTA 16.5, APTA 15.20 and APTA 21.54. In each experiment there were trialed at least 10 cultivars. The other cultivars or advanced clones were included at least in one experiment. The following parameters were evaluated: total and commercial yield, total and commercial number of tubers, dry matter content, reducing and total sugars, severity of potato late blight (Phytophthora infestans) and early blight (Alternaria solani). In 2007, in Monte Alegre do Sul, the cultivars Apuã (14.32 t ha-1), Monte Alegre, 172 (13.44 t ha-1), and Ibituaçú (12.75 t ha-1) displayed the highest yield performance. In the same year, in Socorro, Ibituaçú (21.27 t ha-1) exhibited the highest yield among trialed cultivars. In 2008, in Monte Alegre do Sul the advanced clones APTA 16.5 (24.25 t ha-1), APTA 21.54 (23.21 t ha-1), Ibituaçú (20.19 t ha-1), and cultivars Cupido (18.03 t ha-1), Apuã (17.08 t ha-1), Itararé (16.66 t ha-1), and Monte Alegre 172 (16.18 t ha-1) showed high yielding performance. In the same year, in Socorro, the treatments APTA 16.5 (21.02 t ha-1), APTA 21.54 (19.28 t ha-1), Ibituaçú (19.88 t ha-1), and Apuã (18.72 t ha-1) showed outstanding yield performance. The dry matter and reducing sugars in all genotypes showed higher and lower, respectively, in relation to those found in the literature. APTA 16.5, Apuã, Aracy, Aracy Ruiva, Éden, Ibituaçú and Monte Alegre 172 exhibited moderate to high level of field tolerance to early blight, displaying few or absence of the disease symptoms. ´Apuã, Aracy, Catucha, Ibituaçú and Monte Alegre 172 showed the highest level of resistance to late blight.
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Pradhanang, Prakash Man. "Bacterial wilt of potato caused by Ralstonia solanacearum biovar 2A : a study of the ecology and taxonomy of the pathogen in Nepal." Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245336.

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Lin, Hsiu-Mei, and 林秀玫. "A Study on Experiential Marketing – An Example of Kua KuaYuan Sweet potatoes Ecology Story Shop." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/7t22yn.

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碩士
康寧大學
資訊傳播研究所
103
The aim of this study is to investigate tourists’ perspective on experiential marketing while visiting. The participants were the tourists visiting . This study was conducted mainly by using a survey design. The questionnaires of this study were derived from relevant information in the literature review which defined experience of experiential marketing consisting of sensing, feeling, thinking, acting and relating to Ecomuseum, and the interviews with the Kua Kua Yuan owner and employees. The Statistical Package for the Social Sciences Version 20(SPSS20) was used to compute all quantitative data analyses. Statistical tests included descriptive statistics, t-test, and one-way ANOVA.The findings revealed that 1) the item “I think the Kua Kua Yuan provided detailed explanations & navigation service” reached the highest scores in sensing section ; 2) the item emphasizing on “I think the affable attitude of the Kua Kua Yuan's staff is satisfactory while they guided tourists” got the highest scores in feeling section; 3) the item “I think it is helpful to understand the unique nutritional value of sweet potatoes by visiting Kua Kua Yuan” got the highest scores in thinking section; 4) the item “I think the family experience activities in Kua Kua Yuan should be designed more” reported the highest score in acting section; 5) the item “I think the Kua Kua Yuan should develop innovative & special health food” reported the highest score in relating section. This study is expected to contribute to the experiential marketing strategies which can meet both leisure and educational needs and develop uniqueness and creativity of tourist factory managers.
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Books on the topic "Potatoes Ecology"

1

International, Potato Modeling Conference (2nd 1994 Wageningen Netherlands). Potato ecology and modelling of crops under conditions limiting growth. Dordrecht: Kluwer Academic Publishers, 1995.

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International Potato Modeling Conference (2nd 1994 Wageningen, Netherlands). Potato ecology and modelling of crops under conditions limiting growth. Dordrecht: Springer-Science+Business Media, 1995.

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Wood, Emma. Peatbogs, plague and potatoes: How climate change and geology shaped Scotland's history. Edinburgh: Luath Press, 2009.

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Peatbogs, plague and potatoes: How climate change and geology shaped Scotland's history. Edinburgh: Luath Press, 2009.

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Haverkort, A. J., and D. K. L. MacKerron, eds. Potato Ecology And modelling of crops under conditions limiting growth. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0051-9.

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Volʹvach, V. V. Modelirovanie vlii͡a︡nii͡a︡ agrometeorologicheskikh usloviĭ na razvitie koloradskogo zhuka. Leningrad: Gidrometeoizdat, 1987.

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Leaf, Sue. Potato City: Nature, history, and community in the Age of Sprawl. St. Paul: Borealis Books, 2004.

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(Editor), A. J. Haverkort, and D.K.L. MacKerron (Editor), eds. Potato Ecology and Modelling of Crops under Conditions Limiting Growth (Current Issues in Production Ecology). Springer, 1995.

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Terán, Verónica Núñez. Ecuadorean soil arthropod distribution in native vegetation, pasture and cropland and a potato field with and without pesticides. 1999.

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MacKerron, D. K. L., and A. J. Haverkort. Potato Ecology And modelling of crops under conditions limiting growth: Proceedings of the Second International Potato Modeling Conference, held in Wageningen 17-19 May, 1994. Springer, 2011.

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Book chapters on the topic "Potatoes Ecology"

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Van Loon, C. D. "Future focus of physiology and modelling of potatoes." In Potato Ecology And modelling of crops under conditions limiting growth, 373–79. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0051-9_24.

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Terakado-Tonooka, Junko, Shotaro Ando, Yoshinari Ohwaki, and Tadakatsu Yoneyama. "NifHGene Expression and Nitrogen Fixation by Diazotrophic Endophytes in Sugarcane and Sweet Potatoes." In Molecular Microbial Ecology of the Rhizosphere, 437–44. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118297674.ch41.

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Stevenson, W. R., J. A. Wyman, K. A. Kelling, L. K. Binning, D. Curwen, T. R. Connell, and D. J. Heider. "Prescriptive crop and pest management software for farming systems involving potatoes." In Potato Ecology And modelling of crops under conditions limiting growth, 291–303. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0051-9_19.

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Nemecek, Thomas, Jacques O. Derron, Andreas Fischlin, and Olivier Roth. "Use of a crop-growth model coupled to an epidemic model to forecast yield and virus infection in seed potatoes." In Potato Ecology And modelling of crops under conditions limiting growth, 281–90. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0051-9_18.

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Shah, Mohd Abas, Sridhar Jandrajupalli, Vallepu Venkateshwarlu, Kamlesh Malik, Anuj Bhatnagar, and Sanjeev Sharma. "Population Ecology of Aphid Pests Infesting Potato." In Sustainable Agriculture Reviews 28, 153–81. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-90309-5_5.

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Banville, Gilbert J., Donald E. Carling, and Barbara E. Otrysko. "Rhizoctonia Disease on Potato." In Rhizoctonia Species: Taxonomy, Molecular Biology, Ecology, Pathology and Disease Control, 321–30. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-017-2901-7_29.

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Mol, L., and A. J. Termorshuizen. "Life cycle and ecology of Verticillium dahliae in potato." In Potato Ecology And modelling of crops under conditions limiting growth, 251–63. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0051-9_16.

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Pallais, N., P. Malagamba, N. Fong, R. Garcia, and P. Schmiediche. "Pollen Selection Through Storage: A Tool for Improving True Potato Seed Quality?" In Biotechnology and Ecology of Pollen, 153–58. New York, NY: Springer New York, 1986. http://dx.doi.org/10.1007/978-1-4613-8622-3_26.

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Van Oijen, M. "Simulation models of potato late blight." In Potato Ecology And modelling of crops under conditions limiting growth, 237–50. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0051-9_15.

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Van Keulen, H., and W. Stol. "Agro-ecological zonation for potato production." In Potato Ecology And modelling of crops under conditions limiting growth, 357–71. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0051-9_23.

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Conference papers on the topic "Potatoes Ecology"

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Sava Sand, Camelia. "MEDICINAL PLANT INTRODUCTION INTO POTATO CULTURE FOR PESTS CONTROL." In 13th SGEM GeoConference on ECOLOGY, ECONOMICS, EDUCATION AND LEGISLATION. Stef92 Technology, 2013. http://dx.doi.org/10.5593/sgem2013/be5.v1/s20.088.

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Prager, Sean Michael. "Implications ofCandidatus Liberibacter solanacerum infection for management and ecology of potato psyllids." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.114967.

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Chekalin, S. G., E. U. Guseva, and I. L. Didenko. "Potato biological abilities in the climate change conditions." In INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE “TECHNOLOGY IN AGRICULTURE, ENERGY AND ECOLOGY” (TAEE2022). AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0127452.

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Melnic, Maria, Dumitru Erhan, Stefan Rusu, and Olesea Gliga. "Impactul parazitar: nematoda Ditylenchus destructor–tuberculi de cartofi infestaţi în primele faze de ditilenhoză." In International symposium ”Functional ecology of animals” dedicated to the 70th anniversary from the birth of academician Ion Toderas. Institute of Zoology, Republic of Moldova, 2019. http://dx.doi.org/10.53937/9789975315975.48.

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There are presented data about morpho-physiological changes, as well as physiologico biochemicals, which appear in the tissue of potato tubers infested with Ditylenchus destructor (phases 2, 3 ditylenchose). The obtained data confirms that, D. destructor in the nutrition process eliminates in parallel celulosolitic and pectolytic enzymes, which cause complete maceration of the pectocellulosic membranes of the infected potato cell, as well as the parenchymal cortical tissue in which predominantly cellulose and pectic substances , dominating being cellulose. The results of the biochemical analyzes revealed that, at this stage in the parasite tissue there is a diminishing of the dry mass quantity, and the increase of the quantity of water. It is important to mention that in the plasmalemma mechanically traumatized by the nematode stiletto, the main intracellular inclusions of the potato tuber - the starch granules - were kept without change. Subsequently, when plasmalemma is destroyed, the granules diffuse into the nematode suspension.
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Reports on the topic "Potatoes Ecology"

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Hunter, Martha S., and Einat Zchori-Fein. Rickettsia in the whitefly Bemisia tabaci: Phenotypic variants and fitness effects. United States Department of Agriculture, September 2014. http://dx.doi.org/10.32747/2014.7594394.bard.

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The sweet potato whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae) is a major pest of vegetables, field crops, and ornamentals worldwide. This species harbors a diverse assembly of facultative, “secondary” bacterial symbionts, the roles of which are largely unknown. We documented a spectacular sweep of one of these, Rickettsia, in the Southwestern United States in the B biotype (=MEAM1) of B. tabaci, from 1% to 97% over 6 years, as well as a dramatic fitness benefit associated with it in Arizona but not in Israel. Because it is critical to understand the circumstances in which a symbiont invasion can cause such a large change in pest life history, the following objectives were set: 1) Determine the frequency of Rickettsia in B. tabaci in cotton across the United States and Israel. 2) Characterize Rickettsia and B. tabaci genotypes in order to test the hypothesis that genetic variation in either partner is responsible for differences in phenotypes seen in the two countries. 3) Determine the comparative fitness effects of Rickettsia phenotypes in B. tabaci in Israel and the United States. For Obj. 1, a survey of B. tabaci B samples revealed the distribution of Rickettsia across the cotton-growing regions of 13 sites from Israel and 22 sites from the USA. Across the USA, Rickettsia frequencies were heterogeneous among regions, but were generally at frequencies higher than 75% and close to fixation in some areas, whereas in Israel the infection rates were lower and declining. The distinct outcomes of Rickettsia infection in these two countries conform to previouslyreported phenotypic differences. Intermediate frequencies in some areas in both countries may indicate a cost to infection in certain environments or that the frequencies are in flux. This suggests underlying geographic differences in the interactions between bacterial symbionts and the pest. Obj. 2, Sequences of several Rickettsia genes in both locations, including a hypervariableintergenic spacer gene, suggested that the Rickettsia genotype is identical in both countries. Experiments in the US showed that differences in whitefly nuclear genotype had a strong influence on Rickettsia phenotype. Obj. 3. Experiments designed to test for possible horizontal transmission of Rickettsia, showed that these bacteria are transferred from B. tabaci to a plant, moved inside the phloem, and could be acquired by other whiteflies. Plants can serve as a reservoir for horizontal transmission of Rickettsia, a mechanism that may explain the occurrence of phylogenetically-similarsymbionts among unrelated phytophagous insect species. This plant-mediated transmission route may also exist in other insect-symbiont systems, and since symbionts may play a critical role in the ecology and evolution of their hosts, serve as an immediate and powerful tool for accelerated evolution. However, no such horizontal transmission of Rickettsia could be detected in the USA, underlining the difference between the interaction in both countries, or between B. tabaci and the banded wing whitefly on cotton in the USA (Trialeurodes sp. nr. abutiloneus) and the omnivorous bug Nesidiocoristenuis. Additionally, a series of experiments excluded the possibility that Rickettsia is frequently transmitted between B. tabaci and its parasitoid wasps Eretmocerusmundus and Encarsiapergandiella. Lastly, ecological studies on Rickettsia effects on free flight of whiteflies showed no significant influence of symbiont infection on flight. In contrast, a field study of the effects of Rickettsia on whitefly performance on caged cotton in the USA showed strong fitness benefits of infection, and rapid increases in Rickettsia frequency in competition population cages. This result confirmed the benefits to whiteflies of Rickettsia infection in a field setting.
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