Test of few insecticides against the various developmental stages of Hieroglyphus species (Hemiacridinae: Acrididae: Orthoptera)

The species of Hieroglyphus reported as the most destructive pests of rice, maize, wheat and sugarcane in Pakistan. Population of these distressing pests is increasing widely from year to year due to favorable geographical conditions of the country. To reduce the grasshopper's population several strategies have been used from time to time but, insecticides have been the most effective control measure. Therefore, in this study two insecticides namely: Thiodan 35EC (Emulsifiable concentrate, containing 35% technical grade Endosulfan) Regent 4SC (containing 4% Fipronil) and one control (untreated) treatment were replicated three time against the various stages of H. perpolita (Uvarov), H. oryzivours Carl and H. nigrorepletus I. Bolivar under laboratory condition. Results from the study suggested that the nymphs of the earlier stages die earlier and found to be more susceptible to insecticides than the later nymphal stages or the adults. This study concludes that both the insecticides used at the recommended rate were effective in controlling Hieroglyphus's population.