Compatibility of insecticides and fungicides on the mortality of Nilaparvata lugens (Stall.) and on the inhibition of rhizoctonia solani kuhn.

Abstract

The compatibility of insecticides and fungicides commonly used for the control of insect pest and disease of rice was studied in the laboratory using Nilaparvata lugens and Rhizocfonia sdanl as lest organisms. By fixing the proportion of constituents in the insecticidal, fungicidal mixture judiciously, it may be possible to reduce the field dose of insecticide as there was synergism in the insecticidal activities of lower dose of quinalphos when combined with different doses of fungicides. The fungicidal effectsof the three fungicides were signifcantly altered when combined with insecticides. Combination with fungicides showed an antagonistic effect at higher levels of captofol, ediphenphosand carbendazim, while at lower concentrations there was enhancement of fungicidal effect.