author(s)
Hadi Husain Khan and Ashwani Kumar

abstract
The experiment was carried out to study the mortality of 3^rd 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 3^rd 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 T_2, Spinosad (98.33 %), T_12, Cypermethrin (96.67 %), T_1, 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 T_7, 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.