Co-Authors:
Mendel, Z., Department of Entomology, Agricultural Research Organization, The Volcani Center, Bet Dagan, 50250, Israel
Blumberg, D., Department of Entomology, Agricultural Research Organization, The Volcani Center, Bet Dagan, 50250, Israel
Ishaaya, I., Department of Entomology, Agricultural Research Organization, The Volcani Center, Bet Dagan, 50250, Israel
Abstract:
We report and discuss effects of four insect growth regulators: buprofezin, fenoxycarb pyriproxyfen and chlorfluazuron, at concentrations recommended for agricultural use on six species of natural enemies of homopteran pests. Dipping in buprofezin had no appreciable effect on adult mortality, oviposition and development of Comperiella bifasciata (Howard), (Hymenoptera: Encyrtidae). When exposed to hosts treated with buprofezin, percentage mortality of adult Encyrtus infelix Embleton (Encyrtidae) was low; buprofezin had some detrimental effect on immature stages of E. infelix when applied prior to parasitization, but not when introduced after parasitization. Buprofezin had a slight effect on the immature stages of Cryptochaetum iceryae Williston (Diptera: Cryptochaetidae), while fenoxycarb and pyriproxyfen had marked detrimental effects on parasitization and/or development of the parasitoid fly. None of the larvae of Rodolia cardinalis Mulsant (Coleoptera: Coccinellidae) developed into adults after application of buprofezin, fenoxycarb or pyriproxyfen. Buprofezin and chlorfluazuron completely prevented egg hatch of Chilocorus bipustulatus L. (Coleoptera: Coccinellidae). Buprofezin did not adversely affect egg hatch and larval development of Elatophilus hebraicus Pericart (Hemiptera: Anthocoridae); fenoxycarb or pyriproxyfen applied either before or after oviposition on pine needles caused total suppression of egg hatch. © 1994 Lavoisier Abonnements.
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