Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae) larval feeding behavior on transgenic maize (MON 863) and its isoline.

  title={Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae) larval feeding behavior on transgenic maize (MON 863) and its isoline.},
  author={Pete L. Clark and Ty T. Vaughn and Lance J Meinke and Jaime Molina-ochoa and John E. Foster},
  journal={Journal of economic entomology},
  volume={99 3},
Diabrotica species (Coleoptera: Chrysomelidae) larval behavior studies have posed a challenge to researchers because of the subterranean life cycle of this pest. To fully understand how the western corn rootworm, Diabrotica virgifera virgifera LeConte, injures the maize, Zea mays L., root system, its behavior must be studied. For example, larvae that can detect an area of the root that has a lower amount of toxin, whether from an insecticide or a transgenic maize plant, have an increased chance… Expand
Transmission of Pantoea ananatis, the causal agent of leaf spot disease of maize (Zea mays), by western corn rootworm (Diabrotica virgifera virgifera LeConte)
The presence of pathogenic bacteria in the body of the examined WCR beetles was confirmed, and the presence of symptoms of the bacterial disease was noted on maize plants, fulfilling Koch`s postulates and indicating that the WCR is a vector of P. ananatis on maize Plants. Expand
Seasonal dispersal of the Western corn rootworm (Diabrotica virgifera virgifera) adults in Bt and non-Bt maize fields
It is found that intensive movement of the WCR adults from the place of their origin started later in the vegetation season, and Bt-maize hybrids containing MON 88017 strongly influenced the level of thewCR damage as assessed by lodging of the maize plants, and they also influenced the numbers of theWCR adults before maize flowering. Expand
Impact of Cry3Bb1-expressing Bt maize on adults of the western corn rootworm, Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae).
Direct effects of Cry3Bb1 on adult beetles could explain the observed effects, but varietal differences between Bt and control maize are also possible and the impact of Bt maize on adult populations is likely to be limited. Expand
Western Corn Rootworm (Coleoptera: Chrysomelidae) Larval Movement in eCry3.1Ab+mCry3A Seed Blend Scenarios
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. Expand
Host Recognition Responses of Western (Family: Chrysomelidae) Corn Rootworm Larvae to RNA Interference and Bt Corn
All corn hybrids tested do contain the contact cues necessary to elicit a host preference response by bothCry3Bb1-resistant and Cry3BB1-susceptible larvae that would work to hinder resistance development in refuge in a bag fields. Expand
Adaptation by Western Corn Rootworm (Coleoptera: Chrysomelidae) to Bt Maize: Inheritance, Fitness Costs, and Feeding Preference
The resistant strain developed faster and had increased survival on Bt maize relative to a susceptible strain, and results from reciprocal crosses of the resistant and susceptible strains indicated that inheritance of resistance was nonrecessive. Expand
Assessing larval rootworm behaviour after contacting maize roots: impact of germplasm, rootworm species and diapause status
This bioassay is not useful in screening maize germplasm for rootworm resistance because of the lack of significant behavioural differences among maize lines with a range of susceptibility levels. Expand
Field evaluation of an attract and kill strategy against western corn rootworm larvae
Further research on belowground orientation and movement of D. v. virgifera larvae, as well as tests with combinations of CO2-emitting capsules and lower rates of soil insecticide are needed to potentially develop attract and kill strategies as a management option against this maize pest. Expand
Effect of MIR604 Transgenic Maize at Different Stages of Development on Western Corn Rootworm (Coleoptera: Chrysomelidae) in a Central Missouri Field Environment
Overall, western corn rootworm larval recovery, root damage, and adult emergence were significantly higher on isoline maize compared with MIR604, and results are discussed in relation to insect resistance management of western cornrootworm. Expand
Microbial Symbionts in Insects Influence Down-Regulation of Defense Genes in Maize
The expression data suggest that the pressure of microbes, which are most likely Wolbachia, mediate the down-regulation of many maize defenses via their insect hosts, and is also the first expression profile for a plant attacked by a root-feeding insect. Expand


Tests in a soil olfactometer indicated that the larvae aggregated around an odor source (plant roots) probably by being attracted toward the source rather than by moving randomly, finding the odor source by chance, and then being stopped at the source by an arrestant. Expand
Survival of Northern Corn Rootworm Eggs Through One and Two Winters
A small percentage of eggs did not hatch during the growing season following the fall of oviposition, and stayed viable through the second winter. Expand
Survival of starved neonate larvae of Diabrotica virgifera virgifera LeConte ( Coleoptera : Chrysomelidae )
  • J . Kans . Entomol . Soc .
  • 1989
On the Biology and Egg-Laying Habits of the Western Corn Rootworm