Population dynamics of defoliator and sucking pests in black gram

Abstract

Population dynamics of black gram defoliators viz., leaf folder, Omiodes indicata (Fabricus), striped flea beetle, Phyllotreta striolata (Fabricus) and the sucking pest, bean aphids, Aphis craccivora (Koch) were studied in the entire crop growth period during Kharif 2020 and Rabi 2020 - 2021. The results exhibited the high peak of population of defoliator’s population at 43rd Standard Week (SW) (91 larvae/ 50 plants) and 14th SW (76 larvae/ 50 plants), 43rd SW (210 beetles/ 50 plants) and 14th SW (197 beetles/ 50 plants) during Kharif 2020 and Rabi 2020 – 2021, respectively. The sucking pest reached a high peak at 45th SW (325 aphids/ 50 plant) and 16th SW (305 aphids/ 50 plant) during Kharif 2020 and Rabi 2020 – 2021. Impact of meteorological parameters on the population dynamics of black gram pests were studied and interpreted.