Efficacy of botanical insecticides against linseed budfly (Dasyneura lini, barnes) in linseed (Linum usitatissimum linn.)

Abstract

The efficacy of botanical insecticides against linseedbudfly, Dasyneura liniwas experimented during Rabi season 2012-13 at the Student’s Instructional Farm of Narendra Deva University of Agriculture and Technology, Narendra Nagar (Kumarganj), Ayodhya (U.P.). The efficacy of budfly was recorded on variety Neelam at weekly intervals from germination till the harvest of the crop. There were eight treatments, namely Imidacloprid 17.8 SL @ 0.005%, Nimbicidine 0.25%, NSKE 5%, Neem leaf extract 5%, Green chilli extract 0.5%, Garlic extract 5%, Tulsi leaf extract 5% and Control. While application of Nimbicidine @ 0.25% was found most effective as botanical insecticide followed by, NSKE @ 5% was found as the least effective in controlling of bud fly infestation. On the basis of yield, the highest yield was obtained from Nimbicidine @ 0.25% (14.29 q/ha-1) followed by 13.85 q/ha-1with NSKE @ 5%. On the basis of overall performance of all the eight treatments Nimbicidine @ 0.25% was isolated as the most effective botanical treatment for the control of the linseed budfly.