The MATERIALS EMPLOYED in the present research investigations were a field-grown crop of cotton and 4 different spray schedules. The TRIALS were, however, laid out at the Ayub Agricultural Research Institute, (AARI), Faisalabad in a Randomized Complete Block Design (RCBD) and there were, thus, five treatments including a control, having three repeats each. The SPRAY MATERIALS were prepared on V/V basis, and sprayed over to the crop at an interval of fortnight starting from August, 2010 by means of a Solo-Knapsack sprayer. The various observations on the population of cotton jassid during the...