Bio-efficacy of insecticides and neem products against Helicoverpa armigera (Hubner) on tomato

Abstract

Tomato is attacked by several insect pests from the time of planting till fruit is harvested, among them fruit borer, Helicoverpa armigera (Hubner) is the major one. Investigations were carried out for three years on bio-efficacy of insecticides and neem products against Helicoverpa armigera on Tomato. Resutls revealed that minimum incidence of Helicoverpa armigera was observed in treatment flubendiamide 20% WDG @ 2.5 ml and chlorantraniliprole 8.5% SC @ 3.0 ml, first at the time of flowering and second at 15 days after first spray for obtaining higher yield and better return. Results of residue analysis revealed that, the residue content of this insecticide remained below maximum residue limit (MRL) in tomato fruits after three days.