The Experts below are selected from a list of 3090 Experts worldwide ranked by ideXlab platform
Rachael E. Goodhue - One of the best experts on this subject based on the ideXlab platform.
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Management and Yield Impact of the Greenhouse Whitefly (Trialeurodes vaporariorum )o n
2007Co-Authors: Gregory J. Mckee, Frank G. Zalom, Rachael E. GoodhueAbstract:Reductions in strawberry yields were observed in association with infestations of the greenhouse whitefly, Trialeurodes vaporariorum (Westwood). The magnitude of yield impact is estimated using data from afield experiment evaluating nine management approaches for the greenhouse whitefly on strawberries, var. Camarosa. A range of effectiveness and yields was found. Imidacloprid (Admire) applied at transplanting was found to provide the greatest effect on adult whitefly densities. Pyriproxyfen (Esteem) had no immediate effect on adult density but reduced nymphal densities over time. Pairing the use of these products at transplant (Admire) and early spring (Esteem) provided the greatest reduction in whitefly density observed relative to an untreated control.Reductionsinstrawberryyieldswerefoundtoincreaseaswhiteflydensitiesgrow or as populations persist over time. For example, the estimates from our analysis suggest that at 20 weeks after planting, an average whitefly population may reduce average weekly yields in an untreated field by '80 g/plant.
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Management and Yield Impact of the Greenhouse Whitefly (Trialeurodes vaporariorum) on California Strawberries
HortScience, 2007Co-Authors: Gregory J. Mckee, Frank G. Zalom, Rachael E. GoodhueAbstract:Reductions in strawberry yields were observed in association with infestations of the greenhouse whitefly, Trialeurodes vaporariorum (Westwood). The magnitude of yield impact is estimated using data from a field experiment evaluating nine management approaches for the greenhouse whitefly on strawberries, var. Camarosa. A range of effectiveness and yields was found. Imidacloprid (Admire) applied at transplanting was found to provide the greatest effect on adult whitefly densities. Pyriproxyfen (Esteem) had no immediate effect on adult density but reduced nymphal densities over time. Pairing the use of these products at transplant (Admire) and early spring (Esteem) provided the greatest reduction in whitefly density observed relative to an untreated control. Reductions in strawberry yields were found to increase as whitefly densities grow or as populations persist over time. For example, the estimates from our analysis suggest that at 20 weeks after planting, an average whitefly population may reduce average weekly yields in an untreated field by ≈80 g/plant.
Youjun Zhang - One of the best experts on this subject based on the ideXlab platform.
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Chromosome-level genome assembly of the greenhouse whitefly (Trialeurodes vaporariorum Westwood)
Molecular ecology resources, 2020Co-Authors: Wen Xie, Zhangjun Fei, Youjun ZhangAbstract:The greenhouse whitefly, Trialeurodes vaporariorum Westwood, is an agricultural pest of global importance. Here we report a 787-Mb high-quality draft genome sequence of T. vaporariorum assembled from PacBio long reads and Hi-C chromatin interaction maps, which has scaffold and contig N50 lengths of 70 Mb and 500 kb, respectively, and contains 18,275 protein-coding genes. About 98.8% of the assembled contigs were placed onto the 11 T. vaporariorum chromosomes. Comparative genomic analysis reveals significantly expanded gene families such as aspartyl proteases in T. vaporariorum compared to Bemisia tabaci Mediterranean (MED) and Middle East-Asia Minor 1 (MEAM1). Furthermore, the cytochrome CYP6 subfamily shows significant expansion in T. vaporariorum and several genes in this subfamily display developmental stage-specific expression patterns. The high-quality T. vaporariorum genome provides a valuable resource for research in a broad range of areas such as fundamental molecular ecology, insect-plant/insect-microorganism or virus interactions and pest resistance management.
H. Schmutterer - One of the best experts on this subject based on the ideXlab platform.
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investigations on side effects of margosan o on encarsia formosa gah hym aphelinidae parasitoid of the greenhouse whitefly Trialeurodes vaporariorum westw hom aleyrodidae
Journal of Applied Entomology, 1993Co-Authors: M. Feldhege, H. SchmuttererAbstract:In order to achieve more information on the side-effects of neem products on beneficial organisms, investigations were conducted on Encarsia formosa, a parasitoid of the greenhouse whitefly Trialeurodes vaporariorum. Of special interest was the evaluation of the influence on the parasitoid's longevity, emergence and capacity of parasitism after indirect contact with Margosan-O. The results showed that the application of 10 ppm azadirachtin was relatively non-toxic, whereas the concentration of 20 ppm led to a slight but significant reduction of the fitness of E. formosa. Zusammenfassung Untersuchungen zu Nebenwirkungen von Margosan-O auf Encarsia formosa Gah. (Hym., Aphelinidae) bei der Bekampfung der Weisen Fliege Trialeurodes vaporariorum Westw. (Hom., Aleyrodidae) Um zu genaueren Erkenntnissen bezuglich der Nebenwirkungen von Niemextrakten auf Nutzlinge zu gelangen, wurden Untersuchungen an Encarsia formosa, einem Parasitoiden der Weisen Fliege Trialeurodes vaporariorum, durchgefuhrt. Von besonderem Interesse war hierbei die Evaluierung von Nebenwirkungen auf die Lebensdauer, die Schlupfrate und die Parasitierungsleistung des Parasitoiden nach Behandlung parasitierter Puparien von T. vaporariorum mit Margosan-O. Die Ergebnisse zeigen, das die Anwendung einer niedriger konzentrierten Formulierung von Margosan-O (10 ppm Azadirachtin) relativ wenig toxisch wirkte, wahrend eine geringe, jedoch signifikante Verminderung der Fitnes von E. formosa nach Behandlung mit der hoher dosierten Variante von 20 ppm zu verzeichnen war.
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Investigations on side‐effects of Margosan‐O on Encarsia formosa Gah. (Hym., Aphelinidae), parasitoid of the greenhouse whitefly, Trialeurodes vaporariorum Westw. (Hom., Aleyrodidae)
Journal of Applied Entomology, 1993Co-Authors: M. Feldhege, H. SchmuttererAbstract:In order to achieve more information on the side-effects of neem products on beneficial organisms, investigations were conducted on Encarsia formosa, a parasitoid of the greenhouse whitefly Trialeurodes vaporariorum. Of special interest was the evaluation of the influence on the parasitoid's longevity, emergence and capacity of parasitism after indirect contact with Margosan-O. The results showed that the application of 10 ppm azadirachtin was relatively non-toxic, whereas the concentration of 20 ppm led to a slight but significant reduction of the fitness of E. formosa. Zusammenfassung Untersuchungen zu Nebenwirkungen von Margosan-O auf Encarsia formosa Gah. (Hym., Aphelinidae) bei der Bekampfung der Weisen Fliege Trialeurodes vaporariorum Westw. (Hom., Aleyrodidae) Um zu genaueren Erkenntnissen bezuglich der Nebenwirkungen von Niemextrakten auf Nutzlinge zu gelangen, wurden Untersuchungen an Encarsia formosa, einem Parasitoiden der Weisen Fliege Trialeurodes vaporariorum, durchgefuhrt. Von besonderem Interesse war hierbei die Evaluierung von Nebenwirkungen auf die Lebensdauer, die Schlupfrate und die Parasitierungsleistung des Parasitoiden nach Behandlung parasitierter Puparien von T. vaporariorum mit Margosan-O. Die Ergebnisse zeigen, das die Anwendung einer niedriger konzentrierten Formulierung von Margosan-O (10 ppm Azadirachtin) relativ wenig toxisch wirkte, wahrend eine geringe, jedoch signifikante Verminderung der Fitnes von E. formosa nach Behandlung mit der hoher dosierten Variante von 20 ppm zu verzeichnen war.
Gregory J. Mckee - One of the best experts on this subject based on the ideXlab platform.
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Management and Yield Impact of the Greenhouse Whitefly (Trialeurodes vaporariorum )o n
2007Co-Authors: Gregory J. Mckee, Frank G. Zalom, Rachael E. GoodhueAbstract:Reductions in strawberry yields were observed in association with infestations of the greenhouse whitefly, Trialeurodes vaporariorum (Westwood). The magnitude of yield impact is estimated using data from afield experiment evaluating nine management approaches for the greenhouse whitefly on strawberries, var. Camarosa. A range of effectiveness and yields was found. Imidacloprid (Admire) applied at transplanting was found to provide the greatest effect on adult whitefly densities. Pyriproxyfen (Esteem) had no immediate effect on adult density but reduced nymphal densities over time. Pairing the use of these products at transplant (Admire) and early spring (Esteem) provided the greatest reduction in whitefly density observed relative to an untreated control.Reductionsinstrawberryyieldswerefoundtoincreaseaswhiteflydensitiesgrow or as populations persist over time. For example, the estimates from our analysis suggest that at 20 weeks after planting, an average whitefly population may reduce average weekly yields in an untreated field by '80 g/plant.
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Management and Yield Impact of the Greenhouse Whitefly (Trialeurodes vaporariorum) on California Strawberries
HortScience, 2007Co-Authors: Gregory J. Mckee, Frank G. Zalom, Rachael E. GoodhueAbstract:Reductions in strawberry yields were observed in association with infestations of the greenhouse whitefly, Trialeurodes vaporariorum (Westwood). The magnitude of yield impact is estimated using data from a field experiment evaluating nine management approaches for the greenhouse whitefly on strawberries, var. Camarosa. A range of effectiveness and yields was found. Imidacloprid (Admire) applied at transplanting was found to provide the greatest effect on adult whitefly densities. Pyriproxyfen (Esteem) had no immediate effect on adult density but reduced nymphal densities over time. Pairing the use of these products at transplant (Admire) and early spring (Esteem) provided the greatest reduction in whitefly density observed relative to an untreated control. Reductions in strawberry yields were found to increase as whitefly densities grow or as populations persist over time. For example, the estimates from our analysis suggest that at 20 weeks after planting, an average whitefly population may reduce average weekly yields in an untreated field by ≈80 g/plant.
Kevin Gorman - One of the best experts on this subject based on the ideXlab platform.
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Pyrosequencing the transcriptome of the greenhouse whitefly, Trialeurodes vaporariorum, reveals multiple transcripts encoding insecticide targets and detoxifying enzymes
BMC genomics, 2011Co-Authors: Nikos Karatolos, Yannick Pauchet, Paul Wilkinson, Ritika Chauhan, Ian Denholm, Kevin Gorman, David R. Nelson, Chris Bass, Richard H. Ffrench-constant, Martin S. WilliamsonAbstract:Background The whitefly Trialeurodes vaporariorum is an economically important crop pest in temperate regions that has developed resistance to most classes of insecticides. However, the molecular mechanisms underlying resistance have not been characterised and, to date, progress has been hampered by a lack of nucleotide sequence data for this species. Here, we use pyrosequencing on the Roche 454-FLX platform to produce a substantial and annotated EST dataset. This 'unigene set' will form a critical reference point for quantitation of over-expressed messages via digital transcriptomics.
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report of resistance to the neonicotinoid insecticide imidacloprid in Trialeurodes vaporariorum hemiptera aleyrodidae
Pest Management Science, 2007Co-Authors: Kevin Gorman, Gregor J Devine, J Bennison, Peter Coussons, N A Punchard, I DenholmAbstract:Susceptibilities of UK and mainland European samples of Trialeurodes vaporariorum (Westwood) to the neonicotinoid insecticide imidacloprid were investigated over a 7 year period. All 24 strains collected between 1997 and 2003 showed similar baseline levels of susceptibility to that of a known susceptible laboratory strain when exposed to a diagnostic concentration (128 mg L−1) of formulated imidacloprid. Two samples collected during 2004, one from the UK and one from The Netherlands, demonstrated reduced susceptibility at this concentration. Using dose–response assays, the presence of resistant individuals was disclosed in both these strains; some individuals were unaffected at doses high enough to induce phytotoxic effects. This report represents the first confirmed cases of neonicotinoid resistance inducing control failures in T. vaporariorum, and highlights a need for careful vigilance to sustain the effectiveness of imidacloprid and related neonicotinoid insecticides. Copyright © 2007 Society of Chemical Industry
