Abstract
Orius sp. eggs were laid on the petioles of white clover Trifolium repens L. and treated with various insecticides by the dipping method. Oxythioquinox, phenisobromolate, pirimicarb, phosalone and dichlorvos showed low toxicity to hatchability of the eggs. However, carbaryl, malathion-BPMC mixture, methidathion, phenthoate and fenthion showed high toxicity to the eggs. When 8 insecticides were sprayed on eggplant hosts for thrips (dominant species was Thrips palmi KARNY.) and their predator Orius sp., buprofezin and phenisobromolate showed no toxicity to the latter, Oxythioquinox, dichlorvos and pirimicarb showed low toxicity to Orius sp.; phosalone, chlorfluazuron and flufenoxuron showed high toxicity. Chlorfluazuron and flufenoxuron especially inhibited the moult of the predator over the long term.
