Journal of FARM SCIENCES, Vol 22, No 3 (2009)

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Evaluation of different spraying systems in the dispersal of HaNPV in pigeonpea ecosystem

J.B. Gopali, Raju Teggelli, D.M. Mannur, Suhas Yeleshetty

Abstract


The study was conducted to evaluate the different sprayers in the management of pod borer at the Agricultural Research station, Gulbarga, Karnataka, India during khairf season of 2006-2008.  The results over two years revealed lowest mean larval population (1.06 larvae/plant), pod damage (24.20%), seed damage (15.78 %) and higher grain yield (10.82 q/ha) with high B:C ratio of 4.50 were recorded in the plot sprayed with tractor / cart mounted sprayers. The findings suggested that tractor / cart mounted high volume sprayer are suitable and practicable in pigeonpea ecosystem for uniform distribution of droplets in the management of pod borer with reduced risk of spray drift and operational difficulties. The foregoing studies indicated that the performance of cart / tractor mounted sprayer was superior to other sprayers in terms of spray fluid requirement, time taken to cover unit area, suppression of larval population, reduction in pod damage and harnessing higher yield.

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