EVALUATION OF HANPV 100 LE IN DIFFERENT SPRAYERS FOR MANAGEMENT OF PIGEONPEA POD BORER HELICOVERPA ARMIGERA (HUBNER)

Abstract

ABSTRACT The study was conducted to evaluate the different sprayers in the management of pod borer using HaNPV 100 LE per ha at the Agricultural Research station, Gulbarga, Karnataka, for two successive years in 2011 and 2012. The results of a year 2011 revealed that lowest mean pod borer larval population (1.16) per five plants at five days after spray recorded in the plot sprayed with Taiwan sprayer, and the results of a year 2012 also revealed that, lowest mean larval population (0.66) per five plants recorded in plots sprayed with Taiwan sprayer. Yield parameters of both years recorded a lowest pod damage (17.22 %), grain damage (13.53 %) and higher grain yield (11.51 q/ha) with high B:C ratio (3.46) in the plots sprayed with Taiwan sprayer. Tractor mounted sprayer was the next best to Taiwan sprayer in the management of pod borer. The foregoing studies indicated that the performance of Taiwan sprayer and tractor mounted sprayer were superior to other sprayers in terms of time taken to cover unit area, suppression of larval population, reduction in pod damage and harnessing higher yield.