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Showing 1 to 13 of 13 for “"Bt corn"”.
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Inheritance, fitness costs, and potential mechanisms of resistance for western corn rootworm larvae surviving Bt corn
The western corn rootworm, Diabrotica virgifera virgifera LeConte, has developed resistance to most control tactics used to manage it. Transgenic corn varieties that express insecticidal proteins from the bacterium Bacillus thuringiensis Berliner (Bt), cause mortality to target pests when ingested. …
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Impact of Natural Mortality Factors on Populations of the European Corn Borer in Bt- and Non-Bt-Corn Fields in Illinois
… the incidence of natural enemies of European corn borer in Bt cornfields. The findings were compared with assessments of the effects of natural enemies in non-Bt cornfields. In my study, corn type did not seem to affect the percentage of eggs parasitized by Trichogramma, the percentage of …
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Western corn rootworm (Coleoptera: Chrysomelidae; Diabrotica virgifera virgifera LeConte) emergence and abundance in transgenic cornfields with structured and seed blend refuges
In the United States and Canada, western corn rootworm (Coleoptera: Chrysomelidae; Diabrotica virgifera virgifera LeConte) larvae have been managed using transgenic Bt (Bacillus thuringiensis Berliner) corn hybrids expressing toxic Cry proteins (i.e., Cry3Bb1, Cry34Ab1/35Ab1, mCry3a) for a decade. …
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Modeling insect resistance to transgenic corn and cowpea
The global area planted to Bt crops covered over 66 million hectares in 2011. Insect resistance management (IRM) is implemented to protect the efficacy of commercial transgenic crops expressing Bacillus thuringiensis toxins because the benefits of the pest susceptibility to Bt toxins is considered …
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Evaluating the effect of foliar insecticides on suspected Bt-resistant western corn rootworms in rotated soybean
The western corn rootworm, Diabrotica virgifera virgifera LeConte, is the most economically significant insect pest of U.S. corn production and can inflict substantial yield loss. Historically, crop rotation was a successful management strategy because oviposition occurred predominantly in …
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Inheritance and fitness costs Of field-derived resistance To Cry3Bb1 corn by western corn rootworm
<p>The western corn rootworm (Diabrotica virgifera virgifera LeConte) is serious pest of corn, particularly in the Midwestern United States. One strategy used to manage western corn rootworm is the planting of transgenic corn that produces one or more Cry toxins derived from Bacillus thuringiensis …
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Responses of rotation-resistant and rotation-susceptible populations of the western corn rootworm to transgenic corn expressing cry toxins and validation of a damage function for corn rootworm larvae
The western corn rootworm, Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae), is a significant insect pest of corn, Zea mays L. Yield losses and control costs associated with the corn rootworm complex—which includes the northern (Diabrotica barberi Smith & Lawrence) and southern …
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FATE, TRANSPORT, AND MIXTURE TOXICITY OF TRANSGENIC BACILLUS THURINGIENSIS CORN (ZEA MAYS) AND ASSOCIATED INSECTICIDES
Corn is a dominating feature in the landscape of the Midwestern United States. Associated with this crop are a plethora of products from fertilizers to pesticides that help farmers maximize grain yield while minimizing costs. A widely accepted form of protection from major pests in the United …
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Field-evolved resistance to Cry3Bb1 corn by the western corn rootworm: Investigations of resistance, emergence, node-injury ratings, and fitness
The western corn rootworm, Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae), is an economically relevant pest of corn, Zea mays L. In 2003, the United States Environmental Protection Agency (US EPA) approved the use of transgenic Bt (Bacillus thuringiensis Berliner) corn hybrids …
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UNDERSTANDING NON-TARGET INSECTICIDE IMPACTS AND OPPORTUNITIES FOR BIOLOGICAL CONTROL IN FIELD CORN
… with one another. Using Mid-Atlantic field corn production systems, I evaluated at-planting insecticides and transgenic Bt corn hybrids as tools for insect pest control. In addition, I quantified their impact on predation and on carabid beetle communities. Carabid beetles may be important …
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The movement behavior and reproductive ecology of western corn rootworm beetles (coleoptera: chrysomeliae) in Bt cornfields with structured and seed blend refuges
In the United States, western corn rootworm (Coleoptera: Chrysomelidae; Diabrotica virgifera virgifera LeConte) larvae have been managed using transgenic Bt (Bacillus thuringiensis Berliner) corn hybrids expressing insecticidal Cry proteins since 2003. To slow the evolution of resistance to Cry …
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Monitoring der Resistenzentwicklung des Maiszünsler (Ostrinia nubilalis), Hübner) gegenüber Bt-Mais
… und das Monitoring resistenter Maiszünsler auf Bt-Maisflächen verwendet um die Resistenzhäufigkeiten zweier Populationen in Deutschland zu ermitteln. Die hier vorgestellten Ergebnisse können für die Planung und Durchführung von Resistenzmanagement-Programmen in Deutschland eingesetzt werden. Sie …