Studies on population of chilli aphids in response to environmental factors

Abstract

The studies on population built of Chilli aphids during Kharif season of 2017-18 at the experimental Farm of Department of Agricultural Entomology, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani with chilli variety PBNC-1 in non-replicated design was carried out to Status of chilli aphids in Parbhani region and to determine the impact of weather parameters on population built of chilli aphids. A close watch on the incidence of chilli aphids was kept from 32nd SMW and was continued up to harvest of the crop in 4th SMW. The population of aphids found to ranged from 1.20 and 9.98 aphids /leaf during 2017-18. During 2017-18 the aphid population was correlated positively significant with the bright sunshine hours (r = 0.711*) and showed negatively significant effect with minimum temperature (r = -0.672*), evening RH (r = -0.773*) and rainfall (r = -0.644*) whereas other wheather parameters were having non Significant correlation with aphids population. regression studies concluded the predictions of the aphid population by using weather parameters were more reliable.