EFFICACY OF NEEM BASED INSECTICIDES FOR THE MANAGEMENT OF LINSEED BUD FLY (Dasyneura lini Dasyneura lini Dasyneura lini Barnes) Barnes)

Abstract

The field experiment was conducted during Rabi seasons of 2007-08, 2008-09, 2009-10, 2010-11 and 2011-12 to evaluate the efficacy of neem based insecticides for the management of linseed bud fly (Dasyneura lini Barnes) at the Linseed Research Farm, College of Agriculture, Nagpur, Maharashtra (India). The experimental results revealed that all the neem based insecticides showed significant differences in reducing bud fly infestation over control. Lowest bud fly infestation (20.84 %) and highest mean seed yield (1097 kg/ha) of linseed was recorded with two fortnightly sprays of Azadirachtin 500 ppm starting from bud initiation followed by Neem seed kernel extract 5 % treated plots with 25.31 % bud fly infestation and seed yield of 983 kg/ha. Whereas, the highest bud fly infestation (41.62 %) and lowest yield was recorded in untreated control (595 kg/ha). Therefore, two fortnightly sprays of Azadirachtin 500 ppm starting from bud initiation is recommended for effective management of linseed bud fly.