Impact of botanicals, mycopathogens and insecticides for the management of thrips on roses under poly house condition

Roses are unexcelled in their popularity as a garden flower and constitute an extremely important floriculture crop. The investigation was therefore undertaken for the management of rose thrips under poly house conditions. Seven days after spraying the treatments viz., Dichlorvos 76% EC @ 1 ml/l (82.41%), Spinosad 45% SC @ 0.5 ml/l (79.45%), neem oil @ 2% (74.99%), and neem seed kernel extract (NSKE) @ 5% (70.58) recorded high mortality on thrips population on leaflets. The chemical treatments of Dichlorvos 76% EC @ 1 ml/l and Spinosad 45% SC @ 0.5 ml/l were found superior which recorded 85.51 and 83.55 per cent thrips mortality on seven days after spraying followed by Neem oil @ 2% (73.07%) and NSKE @ 5% (70.86%), respectively in unopened rose buds. The population of thrips declined significantly in chemical treatments such as Dichlorvos 76% EC @ 1 ml/l (94.15%) and Spinosad 45% SC @ 0.5 ml/l (91.66 %) followed by botanicals like NSKE @ 5% (87.06%) and neem oil 2% (86.38%) on seven days after spraying in partially opened rose flowers. The impact of treatments viz., Spinosad 45% SC @ 0.5 ml/l, NSKE @ 5%, Dichlorvos 76% EC @ 1 ml/l and neem oil @ 2% was found effective in reducing thrips population upto the extent of 92.94, 90.40, 89.48 and 84.89 per cent on seven days after spraying in fully opened rose flowers.