Response of Helicoverpa armigera Hübner to different insecticides

Larval populations of Helicoverpa armigera from Hisar region (Haryana, India) have been founa to be 12.79, 2.73 and 2.76 fold resistant to fenvalerate, cypermethrin and quinalphos respectively as compared to those from Kaul region (Haryana, India). In comparison, resistance to endosulfan was only 0.91 fold.