D.R. BAJYA, B.L. MEENA1* AND D. MONGA

The resistance to five insecticides viz., endosulfan, quinalphos, methomyl, spinoad and cypermethrin was monitored
in H. armigera. The field population of H. armigera from various locations of five districts viz., Sirsa, Hisar, Fatehabad, Jind and Bhiwani of Haryana state developed 1.080- to 130.978- fold mean resistance against different insecticides. However, the population of Hisar was found highly resistant to all the insecticides tested except endosulfan, quinalphos and spinosad. The highest mean resistance against cypermethrin (130.978- folds) was observed in Fatehabad population. The populations collected from Jind and Bhiwani areas were comparatively susceptible to all the insecticides except cypermethrin. However, population of Hisar and Sirsa were comparatively more susceptible to cypermethrin. Bhiwani population showed low level of resistance (1.080- to 26.916- folds) to most of the insecticides under test except cypermethrin.