Study on application of urea with insecticides as drenching against white grub, H. consanguinea

A field experiment comprised of fertilizer with insecticides tested against white grub on groundnut was conducted in endemic area of Junagadh District at Oil Seed Research Station, Manavadar. The fertilizers with chemical treatment have maximum reduction of plant mortality and grub population. Treatment combination of S1P1F2 (S1: imidacloprid 40% + fipronil 40% - 80 WG @ 50 g per ha, F2: urea 50 kg/ha, P1: Chlorpyriphos 20% EC @ 4 lit/ha) maximum reduction of plant mortality than the S0, P0 and F0 (S0: No Seed treatment, P0: No pesticide application, F0: No application of urea) and grub population with high yield can be taken. NICBR point of view, the highest found in S1: imidacloprid 40% + fipronil 40% - 80 WG @ 50 g per ha (1:1.70) and high fertilizer dose (F2: urea 50 kg/ha) (1:64). When treatment combination of S1P1F2 was significantly superior to the other treatments combination and highest NICBR was found (1:1.77). Result indicated that higher doses of fertilizer with combination of seed treatment and pesticide suppressed the grub population and yield is increases than the single insecticide treatment.