Effects of insecticides and fungicides used in guava orchard on parasitoid Diachasmimorpha longicaudata
1998
Jiraporn Petcharat (Prince of Songkla Univ., Songkhla (Thailand). Faculty of Natural Resources. National Biological Control Research Center (Southern Regional Center))
Effects of insecticides and fungicides used to control guava insect pests and diseases on the parasitoid Diachasmimorpha longicaudata of fruit fly Bactrocera papayae were studied. Topical spray of distilled water, metamidophos, malathion, methyl parathion, carbaryl, or neem extract was applied on adult parasitoids, and the insects were observed for mortality. The experimental results indicated that all insecticides, except neem extract, gave significantly higher number of dead parasitoids than that of distilled water. Film test for residual effect of these insecticides gave similar result, but metamidophos gave significantly lower number of dead parasitoids than that of malathion, methyl parathion, and carbaryl. Topical spray of distilled water or each of the three fungicides: benomyl, carbendazim, and mancozeb on the parasitoids had no effect on the parasitoids. However, benomyl gave significantly higher number of dead parasitoids than that of the others in residual film test.
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