Novaluron causes reduced egg hatch after treating adult codling moths, Cydia pomenella: Support for transovarial transfer
1Department of Entomology, Michigan State University, East Lansing, MI 48824
2Department of Plant Protection, Gaziosmanpasa University, Tasliciftlik/Tokat, Turkey
3Department of Entomology, University of Arkansas, 310 Agriculture, Fayetteville, AR 72701
Abstract
The codling moth, Cydia pomonella (L.) (Lepidoptera: Tortricidae), is a primary pest of apples throughout the United States. Reliance on broad spectrum organophosphates has been declining with the slated cancellation and has shifted towards narrow spectrum insecticides. Novaluron, a chitin synthesis inhibitor, has primarily been used for its ovicidal and larvacidal activities. However, recent studies have demonstrated a transovarial effect after exposure to adults. The effects of novaluron were studied to determine if reduced egg hatch occurs after exposure of different sexes to this compound. Effects of this compound through horizontal transfer were also compared with a topical application to C. pomonella eggs. Results from independent exposure of different sexes to novaluron were different than the control for all three exposure types; male only, female only, and both treated. The horizontal transfer experiment yielded no significant difference while the topical application of novaluron on eggs showed significantly lower egg hatch. Although novaluron has no direct toxicity to adults, the results of this study demonstrate that the delayed lethal activity of this compound reduces hatching of eggs laid by treated adults. Along with the direct ovicidal and larvicidal properties of novaluron, the delayed lethal activity provides an important contribution to the overall control seen in the field.
Keywords: chitin synthesis inhibitor, horizontal transfer, transovarial transfer
Abbreviatons: FQPA, Food Quality Protection Act; US EPA, United States Environmental Protection Agency
Correspondence: a* sskim@uark.edu, b wisejohn@msu.edu, c gokce@msu.edu, d whalon@msu.edu, *Corresponding author
Received: 22 November 2010 | Accepted: 8 August 2011 | Published: 22 September 2011
Copyright: This is an open access paper. We use the Creative Commons Attribution 3.0 license that permits unrestricted use, provided that the paper is properly attributed.
ISSN: 1536-2442 | Volume 11, Number 126
Kim S-HS, Wise JC, Gökçe A, Whalon ME. 2011. Novaluron causes reduced egg hatch after treating adult codling moths, Cydia pomenella: Support for transovarial transfer. Journal of Insect Science 11:126 available online: insectscience.org/11.126
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