Monitoring Helicoverpa armigera through Pheromone Trap Catches under Agro Climatic Conditions of Eastern U.P.

To monitor the population of H. armigera the sleeve traps baited with pheromone lure “(z)-11 hexadecenal” (Helilure) were installed in the field of pigeonpea onsixplaces of Eastern Uttar Pradesh (District-Deoria and Siddharth Nagar), using 1.5–2.5 m tall bamboo sticks. Adult male moths activities were noticed from 45^th SW and onwards in both the years. Peak population of moths (>4 moths/week) were recorded during 9^th -11^th SW week and 6^th-11^th SW in the first and second year, respectively. It was lowest (<1 moth/week) during 50^th to 4^th SW. Maximum larval population of H. armigera (>5 larvae/10 plants/week) were observed in the 10^th and 11^th SW. Among the abiotic factors temperature showed positive, while relative humidity negative correlation with moth catches in pheromone traps. The study also revealed the number of trapped moths proportionate the severity larval infestation in pigeonpea.