Safety of Combination Products and Single Compound Insecticides to Microvelia Douglasi Atrolineata Bergroth, a Predator of Planthoppers in Rice

Abstract

Greenhouse studies were carried out on relative safety of insecticides to veliid bug, Microvelia douglasi atrolineata, a predator of plantboppers in rice. Tbe results indicated tbat four combination products, viz., chlorpyriphos 50% + cypermethrin 5% at 344 ppm; betacyfluthrin 1.25% + chlorpyriphos 25% at 393 ppm; acepbate 45% + cypermetbrin 5% at 500 ppm and imidacloprid 5% + betacyfluthrin 5% at 30 ppm and two single compounds, viz., betacyfluthrin at 12.5 ppm and thiacloprid at 120 ppm were more toxic than monocrotophos (500 ppm) and acephate (750 ppm).