Management of insect pests of Vigna radiata (L.) wilczek

Abstract

Investigation on the evaluation of certain management schedules against major insect pests of Vigna radiata (L.) Wilczek, was carried out for two crop seasons (July to October 2001 and 2002) at the Agronomy Farm and the Department of Agricultural Zoology and Entomology of Rajasthan College of Agriculture, Maharana Pratap University of Agriculture & Technology, Udaipur, India. The efficacy of Azadirachta indica A. Juss oil and malathion, as first application against aphids, jassids and whiteflies was significantly lower under sole crop of V. radiataI than when it was inter-cropped with maize during both years (2001 and 2002). Among the different treatment schedules as third application, endosulfan was most effective against the pod borers (Maruca testulalis Geyer and Lampides boeticus L.) in both sole crop and the intercrop. During the two-year study (2001 and 2002), the maximum yield of maize and green gram in the inter-cropped pattern and that as sole crop of green gram, as well as the maximum rupee equivalent yield value was recorded for the management schedule comprising release of Chrysoperla carnea 25 DAS, spray of A. indica oil 40 DAS and endosulfan 55 DAS. The lowest yield of V. radiata was recorded under the management schedule comprising three release of Chrysoperla carnea Stephen at 25, 40 and 55 DAS irrespective of the cropping pattern. © 2009.