The Path analysis of certain climatic factors affects the population of American Bollworm (ABW), Helicoverpa armigera (Hubner) Lepidoptera -Noctuidae in Cotton was assessed at the Jawharlal Nehru Krishi Vishwa Vidhyalaya, Cotton Research Station, Khandwa . The perusal of data on the population of American bollworm, Helicoverpa armigera revealed that the American bollworm, Helicoverpa armigera larvae was first observed during the 29th SMW . III week of July. | Path analysis of climatic factors affects the population of american bollworm helicoverpa armigera Hubner Lepidoptera - Noctuidae in cotton