Abstract
Hydroprene terminated Microctonus aethiopoides Loan diapause when topically applied to host Hypera postica (Gyllenhal). Concentrations of 1, 5, 10, or 50 μg/host terminated diapause in at least 97% of the parasites. Parasite survival and morphological condition were influenced by hydroprene concentration. One μg had no adverse effects other than 8% deformed adults and had no carry-over effect on F1 generation. Five μg did not affect pupation or adult eclosion but caused 31% deformed adults and some deformed adults in F1 generation. Ten μg did not affect pupation, reduced adult eclosion, caused 82% deformed adults, and had a carry-over influence on the Fl generation where there were fewer parasitized weevils, decreases in adult eclosion, and increases in number of deformed F1 M. aethiopoides adults. Fifty μg decreased successful pupation and caused 100% pupal mortality.
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