EFFECT OF VARIETIES AND INSECTICIDES ON THE ABUNDANCE OF PESTS AND PREDATORS OF COTTON IN BANGLADESH

Abstract

Study with the different varieties of cotton and its pests indicate that the varieties having dense hairs and trichoms e.g. CB-9 and CB-5 are more tolerant to sucking pest’s rather smooth varieties. But, bollworms and whiteflies have the positive co-relation with the hairs. The serrated leaved variety SR-05 is potential enough for its less canopy volume and well ventilated bottom environment. More over, a positive relation of predators is found with the abundance of preys. Variety with desirable plant height, number of bolls, boll size and individual boll weight plays an important role for substantial economic return.