Field efficacy of Tolfenpyrad 15 EC against thrips, Thrips palmi Karny on Cucumber

The thrips (Thrips palmi) on cucumber revealed that excellent control of the thrips was observed in the treatment Tolfenpyrad 15 EC @ 150 g a.i./ha at 15 days after spraying registering 82.5 and 83.6% reduction in the population over control during kharif, 2015 and rabi, 2015–16, respectively. Tolfenpyrad 15 EC @ 100.5 and 124.5 g a.i./ha, imidacloprid 17.8 SL @ 22.5 g a.i./ha, fipronil 5 SC @ 40 g a.i./ha and chlorpyriphos 20 EC @ 250 g a.i./ha did not give satisfactory control of thrips at 15 days after spraying on cucumber both during kharif, 2015 and rabi, 2015–16. The chemical Tolfenpyrad 15 EC @ 100.5, 124.5, and 150 g a.i./ha and imidacloprid 17.8 SL @ 22.5 g a.i./ha did not harm the natural enemy, ladybird beetle population at 1, 3, 7 10 and 15 days after each spraying of the chemicals. But, fipronil 5 SC @ 40 g a.i./ha and chlorpyriphos 20 EC @ 250 g a.i./ha reduced the predatory lady bird beetle population significantly over control.