Co-Authors:
Kehat, M., Institute of Plant Protection, Agricultural Research Organization, The Volcani Center, Bet-Dagan, Israel
Gothilf, S., Institute of Plant Protection, Agricultural Research Organization, The Volcani Center, Bet-Dagan, Israel
Dunkelblum, E., Institute of Plant Protection, Agricultural Research Organization, The Volcani Center, Bet-Dagan, Israel
Greenberg, S., Institute of Plant Protection, Agricultural Research Organization, The Volcani Center, Bet-Dagan, Israel
Abstract:
(Z)-11-hexadecenal and (Z)-9-hexadecenal were ineffective lures for H. armigera males unless combined. Attraction depended upon perception of a 90%-99% combination of (Z)-11-hexadecenal with 1%-10% (Z)-9-hexadecenal. Increasing the level of (Z)-9-hexadecenal in the mixture to 26.2% reduced catches. Adding 2.3% (Z)-7-hexadecenal to the mixture did not enhance or reduce attraction, while adding 8.7% (Z)-11-hexadecenol significantly reduced male catches. The combination of (Z)-11-hexadecenal and (Z)-9-hexadecenal was effective only when released from rubber dispensers but not from polyethylene vials. A load of 2 mg of the mixture on rubber dispensers effectively attracted males for at least 31 days. The H. zea lure which contained all the pheromonal components of that species was also effective in attracting H. armigera males. The H. virescens lure attracted significantly fewer H. armigera males than the H. zea lure. © 1980 Nederlandse Entomologische Vereniging.
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