Present address: Central Agricultural Office Plant Protection, Soil Conservation and Agri- Environment Directorate Registration Subdirectorate, Budapest, Budaörsi u. 141-145, H-1118, Hungary.
8-Methyldecan-2-yl acetate inhibits response to the pheromone in the western corn rootworm Diabrotica v. virgifera
Article first published online: 13 OCT 2009
© 2009 Blackwell Verlag, GmbH
Journal of Applied Entomology
Special Issue: INTERNATIONAL WORKING GROUP ON OSTRINIA AND OTHER MAIZE PESTS (IWGO)
Volume 134, Issue 5, pages 462–466, June 2010
How to Cite
Tóth, M., Ujváry, I. and Imrei, Z. (2010), 8-Methyldecan-2-yl acetate inhibits response to the pheromone in the western corn rootworm Diabrotica v. virgifera. Journal of Applied Entomology, 134: 462–466. doi: 10.1111/j.1439-0418.2009.01456.x
For: Z. angew. Entomol. Special Issue A contribution from the IWGO Conference München, April 5–8, 2009
- Issue published online: 11 MAY 2010
- Article first published online: 13 OCT 2009
- Received: June 4, 2009; accepted: September 11, 2009.
- 8-methyldecan-2-yl acetate;
- pheromone inhibitor;
Compounds that are structurally closely related to the western corn rootworm (WCR) (Diabrotica v. virgifera, Coleoptera: Chrysomelidae) pheromone were prepared and screened for biological activity in the field, presented alone or in combination with the pheromone 8-methyldecan-2-yl propanoate. None of the synthetic compounds showed attraction when presented alone. However, when presented in combination with the pheromone, catches in traps containing 8-methyldecan-2-yl acetate as a second component were dramatically reduced, suggesting strong inhibitory activity for this compound. The addition of the inhibitory acetate to the known floral WCR lure (4-methoxycinnamaldehyde plus indole) did not influence male (or female) catches suggesting that the inhibitor interferes in the perception process of the pheromone and not by exerting repellency per se. To our knowledge, this is the first report on an inhibitor of response to pheromone in WCR. 8-Methyldecan-2-yl acetate has previously been described as a sex attractant of Diabrotica cristata, so its inhibitory activity towards males of WCR may reflect a role in maintaining reproductive isolation between the two taxa.