Effect of Weather Factors and Growing Degree day on Population Build up of Aphis craccivora and Empoasca kerri on Vigna mungo

Author: B. Kundu*, N. Chaudhuri, T. Dhar and A. Ghosh

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Abstract

Black gram, Vigna mungo (Linn.) Hepper, a short duration pulse crop, which popularly known as urdbean, mash, mashkalai etc., belongs to the family Fabaceae; sub family Papilioniaceae are infested by sap feeder, foliage feeder, pollen and tissue borer and fruit feeder. Amongst the pests, sap feeders like aphid (Aphis craccivora) and jassid (Empoasca kerri) play major role in reducing the yield quality and quantity of the crop. An experiment was thus conducted to assess the influence of weather factors on population build up of A. craccivora and E. kerri in black gram crop during pre-kharif and post kharif season of two years 2018 and 2019. Pests’ data of four crop seasons, when corroborated with weather parameters it was revealed that evening relative humidity and rainfall had a negative significant influence on aphid population in both the seasons. In addition to this maximum and minimum temperature showed significant negative correlation in post kharif season. However, morning rela

Keywords

Aphis craccivora, Empoasca kerri, Abiotic factors, Growing degree day