BHARPODA, T. M.; PATEL, H. P.; PATEL, J. J.; PATEL, U.; PATEL, G. P.; PATEL, J. R. Evaluation of Economic Threshold Levels for Helicoverpa Armigera on ’H 6’ Cotton (Gossypium Hirsutum) in Central Gujarat Region. Indian J Agri Sci 2013, 69 (4).