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Showing 1 to 20 of 25 for “"western corn rootworm"”.
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Resistance management of western corn rootworm (Coleoptera: Chrysomelidae) in transgenic Bt maize
… thuringiensis (Bt) has been used to manage western corn rootworm, a major pest of maize, since 2003. However, this pest rapidly evolved resistance to Bt traits expressed in maize for rootworm management. This research examines several aspects of resistance management. A field study was used …
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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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Western corn rootworm damage assessment in Virginia and adult sampling with commercial yellow sticky traps
The risk of corn rootworm damage to continuously-grown corn was assessed in 32 fields from seven counties in Virginia in 1993 and 1994, Approximately 28% of the fields examined had economic root damage in corn left untreated with a soil insecticide. In addition, 190/0 of the fields overall had an …
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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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Case Study of a Variant of Western Corn Rootworm, Diabrotica Virgifera Virgifera LeConte, in East Central Illinois
… pest. What role dose phenological asynchrony of corn and soybean development play in the egg-laying behavior of the western corn rootworm? In late August of 1999 and 2000, soybean fields were still green; however, early-planted corn was being harvested. Due to earlier corn planting trends, the …
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Gene Expression and Behaviors Relating to Rotation Resistance in the Western Corn Rootworm, Diabrotica Virgifera Virgifera (Coleoptera: Chrysomelidae)
Yearly rotation of corn with another crop interrupts the life cycle of the western corn rootworm beetle (Diabrotica virgifera virgifera, Coleoptera: Chrysomelidae), but behavioral resistance to crop rotation is a major problem. Resistant adult females exhibit reduced fidelity to corn due to …
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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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The role of digestive proteases in the rotation-resistant phenotype of the western corn rootworm, Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae)
The western corn rootworm (WCR), Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae), is a significant insect pest of maize in the United States, Canada and Europe. Until the mid 1990s, this pest was successfully controlled by annual crop rotation, alternating maize with a non-host …
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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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Influence of Different Crops on the Population Dynamics of the Western Corn Rootworm, Diabrotica Virgifera Virgifera LeConte, in East Central Illinois
… change in the ovipositional behavior of the western corn rootworm, Diabrotica virgifera virgifera LeConte, which is implicated in the decrease of effectiveness of the soybean-maize rotation as a pest management strategy in east central Illinois and northern Indiana. The influences of maize …
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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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Gut physiology and host-microbe interactions of the rotation-resistant variant of the western corn rootworm (Diabrotica virgifera virgifera LeConte) (Coleoptera: Chrysomelidae)
The western corn rootworm (WCR; Diabrotica virgifera virgifera LeConte) is an important chrysomelid pest of corn (Zea mays) in the US. WCR larvae feed on corn roots, while adult beetles may consume aboveground corn tissues. WCR larvae are nutritionally dependent on corn roots; completion of the …
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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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Spatial distribution of western corn rootworm (Diabrotica virgifera virgifera Leconte) trap counts and evaluation of a novel method for sampling soil pests of field corn
… two kinds of soil insects that attack field corn in Virginia. Corn rootworms, the most important of which is the western corn rootworm (WCR), feed on corn roots and have been sampled effectively using yellow sticky traps. The spatial distribution of weekly counts of WCR on yellow sticky traps …
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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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The Role of Attractants and Feeding Stimulants in The Selection of Cucurbita Flowers by Diabroticite Beetles, (Coleoptera: Chrysomelidae)
… traps showed it to be a potent attractant of the western corn rootworm, Diabrotica virgifera virgifera Le Conte and the striped cucumber beetle, Acalymma vittatum (Fabr.). The southern corn rootworm, Diabrotica undecimpunctata howardi Barber, however, was not attracted to indole baited traps. …
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From pest management to education: A study of trap crops for the western corn rootworm (Diabrotica virgifera virgifera LeConte) and 3D models for teaching insect morphology and identification
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Optimal Management of a Common Property Pest Under Risk: An Application to the Corn Rootworm
… management model is developed for the northern corn rootworm, Diabrotica longicornis, and the western corn rootworm, Diabrotica virgifera, insect pests of corn. Uncertainty and risk aversion are incorporated into an economic threshold model. Two control actions, soil insecticide and crop …
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Functional and ecological investigations in Cucurbita: factors mediating fruit infections and insect interactions
… factors. Cucurbit‐feeding beetles such as western corn rootworm, Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae), spotted cucumber beetle Diabrotica undecimpunctata howardi Barber (Coleoptera: Chrysomelidae), and the striped cucumber beetle, Acalymma vittatum Fabricius …
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A Study of Neonicotinoid Seed Treatments in Bt Maize: Insect Resistance Management, Efficacy, and Environmental Fate
… soil-dwelling pest targeted by Bt maize is the western corn rootworm (WCR), Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae). Transgenic Bt technology has dramatically reduced insecticide use for WCR, and insect resistance poses the greatest threat to its utility. To delay …
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