Vol. 10, Issue 11 (2021)

Author(s):
Rishabh Mishra, Pankaj Kumar, Deepak Kumar and Puneet Kumar

Abstract:
A study on seasonal incidence of Lepidopteran insect pests viz., cut worm (Agrotis ipsilon), semi-looper (Autographa nigrisigna) and pod borer (Helicoverpa armigera) on chickpea was carried out at Student’s Instructional Farm of Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhya (U.P.), India during Rabi, 2019-20. Weekly observation on these pests starting from germination to harvest of the crop showed that cut worm, semi-looper and pod borer were damaging the crop at different stages. The cut worm infestation was started from 45^th SW and maximum population was recorded on 47^th SW (2.60/m²). The larval population of semi-looper was recorded for the first time on 49^th SW and maximum population of larvae was on 8^th SW (0.50 larvae/plant). The larval population of pod borer was started from 48^th SW and continued till the harvesting of the crop with maximum larval population 3.60/plant at 10^th SW. Larval population of cut worm showed non-significant positive correlation with maximum temperature, minimum temperature and relative humidity. Larval populations of semi looper showed non-significant negative correlation with maximum temperature, minimum temperature and rainfall while relative humidity had positive correlation. Larval populations of pod borer showed non-significant positive correlation with maximum temperature while minimum temperature, relative humidity and rainfall had non-significant negative correlation.