Activity of several IGRs against Nezara viridula (L) (Hem., Pentatomidae) eggs

Abstract

Concentrations of 10, 1,0.1,0.05 and 0.01 pg/ml of fenoxycarb, and 10, 5 and 1 pg/ml of other 1GR products were applied topically to eggs of Nc.zaru i%+hda. The effects of the treatment and concentration on egg hatching were studied comparatively for each product. Whereas at 10 pg/ml all compounds almost presented 100% of mortality, at lower concentrations most of them lost their activity. Fenoxycarb among all the IGR tested was the most active compound producing 8 1 Yo mortality of 0.1 pg/ml concentration.

Effect of juvenoids pyriproxyfen and diofenolan on embryogenesis and postembryonic development of blow fly Chrysomya megacephala (Diptera: Calliphoridae) following egg treatment

“…Extensive study was done on the eggs of the cat flea C. felis using IGRs fenoxycarb, methoprene, and pyriproxyfen , mode of action of methoprene and pyriproxyfen , and physiological effects like no blastoderm formation; segmented embryos that died during blastokinesis due to pyriproxyfen treatments ) have also been reported and are congruent with the present observations. Canela et al(1995) while Hirano et al (1998) reviewed the ovicidal properties similar to present study when eggs of several agricultural pests (whiteflies, thrips, aphids, and scales) and non-agricultural pests (mosquitoes, flies and other dipterans, cockroaches, fleas, ants, and termites) were exposed to pyriproxyfen and other IGRs. Mondal and Parween (2000) reported ovicidal and embryocidal properties of several IGRs in stored-product insects.…”