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

Abstract

Roses are unexcelled in their popularity as a garden flower and constitute an extremely Important floriculture crop. Investigation was therefore undertaken for the management of rose thrips under polyhouse condition. The one day after spraying of Spinosad and Dichlorvos recorded the lowest population which was significantly superior and followed by Neem oil and NSKE recorded the lowest population was observed for the study. Three days after spraying highest mortality of thrips population on three days after spraying of neem oil (59.61%), NSKE (59.79 %), Spinosad (66.35%) and Dichlorvos (65.75%) when compared all other treatments. Five days after spraying the treatment of neem oil (74.99%), NSKE (70.58), Spinosad (79.45%) and Dichlorvos (82.45%) was high mortality on thrips population was recorded, respectively.The chemical treatment of Dichlorvos and Spinosad were found superior which recorded on 44.72 per cent and 38.13 per cent of thrips mortality on one day after spraying followed by Neem oil (34.61%) and NSKE (31.63%), respectively in un opened rose buds.Population of thrips was significantly declining on chemical treatments such as Dichlorvos (52. 60 %) and Spinosad (50.00 %) followed by botanicals like neem oil (44.96%) and neem seed kernel extract (40.58%) was recorded on one day after spraying in partially opened rose flower.The impact of treatment neem oil, neem seed kernel extract, Spinosad and Dichlorvos found effective in reducing thrips population upto the extent of 41.01, 43.14, 48.71 and 50.66 per cent in one day after spraying in fully opened rose flower.