Evaluating Western Corn Rootworm (Coleoptera: Chrysomelidae) Emergence and Root Damage in a Seed Mix Refuge

@inproceedings{Murphy2010EvaluatingWC,
  title={Evaluating Western Corn Rootworm (Coleoptera: Chrysomelidae) Emergence and Root Damage in a Seed Mix Refuge},
  author={Alexzandra F. Murphy and Matthew D. Ginzel and Christian H Krupke},
  booktitle={Journal of economic entomology},
  year={2010}
}
ABSTRACT Resistance management is essential for maintaining the efficacy and long-term durability of transgenic corn engineered to control western corn rootworm (Diabrotica virgifera virgifera Le Conte). Theoretically, a refuge can be provided by growing susceptible (refuge) plants in either a separate section of the field adjacent to resistant (transgenic) plants, or as a seed mixture. We examined the effects of varying the structure of a 10 and 20% refuge between currently approved structured… 

Emergence and Abundance of Western Corn Rootworm (Coleoptera: Chrysomelidae) in Bt Cornfields With Structured and Seed Blend Refuges

TLDR
The persistent concentration of adults in refuge rows suggests that structured refuge configurations may not facilitate the expected mixing of adults from refuge and Bt corn, which could delay the evolution of Bt resistance.

Applying an Integrated Refuge to Manage Western Corn Rootworm (Coleoptera: Chrysomelidae): Effects on Survival, Fitness, and Selection Pressure

TLDR
Insects in the pure stand refuge treatment had greater survival to adulthood and earlier emergence than in all other treatments, and fecundity, longevity, and head capsule width were reduced in treatments containing Bt maize for some site by year combinations.

Western Corn Rootworm (Coleoptera: Chrysomelidae) Larval Movement in eCry3.1Ab+mCry3A Seed Blend Scenarios

TLDR
The low numbers of western corn rootworm larvae that did move from an infested Bt plant to an isoline plant could potentially select for resistance if they survived to adulthood, and adult survival was greater on Bt plants if movement from a neighboring infested isolate plant had occurred.

Quantifying rates of random mating in western corn rootworm emerging from Cry3Bb1‐expressing and refuge maize in field cages

TLDR
Cage studies using field populations of western corn rootworm found high percentages of beetles that fed on Bt‐expressing plants as larvae, suggesting that mating between resistant beetles may not be rare even if random mating did occur.

Evaluating multiple approaches for managing western corn rootworm larvae with seed blends

TLDR
The addition of a soil insecticide to the seed blend treatments never resulted in significantly improved root protection and failed to provide a consistent yield benefit, suggesting that a soil Insecticide/seed blend combination approach is not warranted.

Larval mortality and development for rotation‐resistant and rotation‐susceptible populations of western corn rootworm on Bt corn

TLDR
Rotation‐resistant and rotation‐susceptible larvae had statistically similar mean levels of mortality and head capsule widths when exposed to both single‐toxin and pyramided Bt corn, suggesting that these two populations do not differ with respect to survival or development when exposure to BtCorn.

Quantifying the Contribution of Seed Blended Refugia in Field Corn to Helicoverpa zea (Lepidoptera: Noctuidae) Populations

TLDR
Results of this study suggest that a seed blended refuge may provide an effective insecticide resistance management alternative for H. zea in areas where structured refuge compliance is low.

The impact of Bt maize as a natal host on adult head capsule width in field populations of western corn rootworm

TLDR
Results indicate that males emerging from Bt‐RW maize plants may be exposed to sublethal doses of the Bt toxin as larvae, and may act to enhance resistance management, particularly in a seed mix refuge system.

Competition of Transgenic Volunteer Corn with Soybean and the Effect on Western Corn Rootworm Emergence

TLDR
Results demonstrate that controlling volunteer corn will not only prevent soybean yield loss, but also may reduce the risk of WCR larval survival after exposure to Bt (Bacillus thuringiensis Berliner derived) corn.
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TLDR
A stochastic spatially explicit computer model is described that simulates the adaptation by western corn rootworm to rootworm-resistance traits in maize, and showed that parameters relating to adult dispersal affected the rate of pest adaptation.

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TLDR
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TLDR
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Field Measures of Western Corn Rootworm (Coleoptera: Chrysomelidae) Mortality Caused by Cry34/35Ab1 Proteins Expressed in Maize Event 59122 and Implications for Trait Durability

TLDR
Findings suggest that a 20% refuge is likely to be highly effective at prolonging the durability of 59122 maize, and support an expectation that alleles conferring resistance to the Cry34/35Ab1 proteins in western corn rootworm will be functionally nearly completely to completely recessive on 59 122 maize.

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TLDR
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TLDR
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TLDR
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