Seasonal incidence of major insect pests of brinjal and their correlation with weather parameters

Abstract

The Seasonal incidenceof major insect pests of Brinjal and their correlation with weather parameters were studied during kharif 2017-18 at the Experimental Farm, Department of Agricultural Entomology, Vasantrao Naik Marathwada Agriculture University, Parbhani. The incidence of aphids was highest (8.5 aphids/three leaves) during 46th MW.Mites reached highest incidence (13.6mites/4cm2/three leaves) in 47th MW. Highest incidence of whitefly (9.1 whiteflies/three leaves) was noticed during 38nd MW. Highest shoot and fruit infestation were found 10.2 per cent at 35th MW and 43.3 per cent at 46th MW respectively. Simple correlation studies revealed that aphids was positively significant correlated with bright sunshine hours (r=0.657*), jassids was negatively significant correlated with maximum temperature (r =-0.494*), whitefly was negatively significant correlated with wind velocity (r=-0.457*), minimum temperature (r = -0.791*), mites incidence was positively significant with bright sunshine hours (0.638*), Population of per cent shoot and fruit damage by L. orbonalis was positively significant with rainfall (r= 0.454*) and bright sunshine hours (0.696*) respectively.