Field Evaluation of Different Insecticides against Bark Eating Caterpillar, Indarbela quadrinotata (Walker) on Populus deltoides

Efficacy of different insecticides against bark eating caterpillar, I. quadrinotata was tested in the field on four years old Poplar plantation using a motorized sprayer. Five insecticides, viz., Sevin 50WP (carbaryl), Dursban 20EC (chlorpyriphos), Thiodan 35EC (endosulphan), Ekalux 25EC (quinalphos) and Curacron 50 EC (profenophos) at 0.05 per cent concentration, were tested in randomized block design with four replications. All the insecticides were significantly better than the untreated control. However, Sevin 50WP resulted in the maximum reduction in insect population (96.8 PROC) whereas Curacron 50EC, the minimum (88.9 PROC) after 15 days of treatment among the five insecticides tested. The use of motorized sprayer proved more effective as this increased the height of spray and coverage area.