Studies on the Effects of Neem Products and Monocrotophos Against Major Pests of Rice and Their Safety to Natural Enemies
Two field experiments were conducted during kharif 1988 and summer 1989 seasons to study the effect of different neem products with ultra low volume (ULV), high volume (HV) and low volume (LV) sprayers in comparison with monocrotophos and an untreated check. The first round of spraying was given when the leaffolder and grasshopper incidence crossed the economic threshold level on 47 and 34 days after transplanting (DAT) rvspectively. Observations on the pest population were recorded in 20 bills at random per plot on7,14, 27 DAT in tne first experiment and on 10 hills 3, 7, 10 and 14 DAT in the second experiment. Observations were also made on the spider, Lycosa pseudoannulata Boesenberg and Straud and the mirid, Cyrtorhinus lividipennis Reuter on 20 hills in each plot.