Effect of certain chemicals and bio-pesticide on the 3rd instar larvae of the Cabbage butterfly, Pieris brassicae (Linn.) (Lepidoptera: Pieridae)

Abstract

The experiment was carried out to study the mortality of 3rd instar larvae of the Cabbage butterfly, Pieris brassicae (Linn.) (Lepidoptera: Pieridae) in the Department of Entomology, Naini Agricultural Institute, SHUATS, Allahabad, U.P. under laboratory condition. The mean data (Mean of 24, 48 and 72 hours after treatment) on population mortality per cent of cabbage white butterfly, Pieris brassicae of 3rd instar larvae 24, 48 and 72 hours after treatment showed that mortality per cent in all the treatments were significantly superior over control. Maximum mortality was observed with T2, Spinosad (98.33 %), T12, Cypermethrin (96.67 %), T1, Imidacloprid (93.33 %), T10, Neem oil + Cypermethrin (88.05 %) and T11, NSKE + Cypermethrin (86.39 %). Followed by T3, Neemarin; T8, Neem oil; T9, NSKE and T7, NPV with (81.39 %), (79.17 %), (76.94 %) and (63.06 %) respectively. The remaining insecticides are T6, B. thuringiensis (57.22 %); T5, B. bassiana (48.89 %) and T4, M. anisopilae (44.17 %). B. thuringiensis, B. bassiana and M. anisopilae were recorded as least effective treatments of all the treatments excluding control.