Modeling a western corn rootworm, Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae), maturation delay and resistance evolution in Bt corn. Issue 6 (2nd October 2013)

• Record Type: Journal Article
• Authors: Kang, Jung koo; Krupke, Christian H; Murphy, Alexzandra F; Spencer, Joseph L; Gray, Michael E; Onstad, David W
• Is Part Of: Pest management science. Volume 70:Issue 6(2014:Jun.)
• Page Start: 996
• Page End: 1007
• Publication Date: 2013-10-02
• Subjects: Pests -- Control -- Periodicals; Pesticides -- Periodicals; 632.9
• DOI: 10.1002/ps.3642
• Languages: English
• ISSNs: 1526-498X

Abstract

<abstract abstract-type="main" id="ps3642-abs-0001"> <title>Abstract</title> <sec id="ps3642-sec-0001" sec-type="section"> <title>BACKGROUND</title> <p id="ps3642-para-0001"> <bold>Emergence delay and female‐skewed sex ratios among adults of <italic>Diabrotica virgifera virgifera</italic> LeConte (Coleoptera: Chrysomelidae) from <italic>Bt</italic> corn have been reported in field studies. The authors used a simulation model to study the effect of a maturation delay and a female‐skewed sex ratio for <italic>D. v. virgifera</italic> emerging from <italic>Bt</italic> corn on the evolution of <italic>Bt</italic> resistance.</bold> </p> </sec> <sec id="ps3642-sec-0002" sec-type="section"> <title>RESULTS</title> <p id="ps3642-para-0002"> <bold>The effect of skewed toxin mortality in one sex on evolution of <italic>Bt</italic> resistance was insignificant. An emergence delay among resistant beetles from <italic>Bt</italic> corn slowed resistance evolution. A shift in the time of emergence for homozygous susceptible beetles from <italic>Bt</italic> corn did not have a significant effect on the evolution of <italic>Bt</italic> resistance in <italic>D. v. virgifera</italic>.</bold> </p> </sec> <sec id="ps3642-sec-0003" sec-type="section"> <title>CONCLUSION</title> <p id="ps3642-para-0003"> <bold>This simulation study suggested that skewed toxin mortality in one sex and an emergence delay for beetles in <italic>Bt</italic> corn are not major concerns for managing resistance by <italic>D. v. virgifera</italic> to single‐toxin or pyramided <italic>Bt</italic> corn. © 2013 Society of Chemical Industry</bold> </p> </sec> </abstract>