B. G. PRAJAPATI, N. R. PATELAND A. U. AMIN

A field trial was conducted at the Seed Spices Research Station, Jagudan for two consecutive seasons, rabi 2013-14 and 2014-15, to evaluate the effective doses of carbosulfan 25EC against aphids and thrips on cumin along with neonicotinoid group of insecticides. Eight treatments of carbosulfan 25EC ®250g a.i./ha, carbosulfan 25EC ® 312.5g a.i./ha, carbosulfan 25EC ®375g a.i./ha, carbosulfan 25EC ®625g a.i./ha) (only for phytotoxicity), thiamethoxam 25WG® 25g a.i./ha, imidacloprid 17.85L® 25g a.i./ha, acetamiprid 20SP®10g a.i./ha and untreated control were evaluated against aphids and thrips in cumin.Among than, carbosulfan 25 EC each at 312.5 and 375g a.i./ ha were proved highly effective in controlling the aphids and thrips in cumin. Mean number of bio-agents viz., coccinellids, syrphids, spiders and Chryroperla cornea did not differ in different treatments during both the years of experimentation. Carbosulfan 25EC (375g a.i./ha) had obtained maximum seed yield of cumin(313kg/ha) as compared to untreated control(156kg/ha). Minimum avoidable loss (5.11%) in seed yield of cumin was observed in carbosulfan 25EC (312.5g a.i./ha), whereas, the highest percentage of avoidable losses in seed yield of cumin was observed in the non protected plots (50.16%) of cumin. The highest dose of carbosulfan 25EC (625g al./ha) did not produce any phytotoxicity symptoms on the treated crop.