Effects of some common natural enemies and neem formulations on Hyposidra infixaria Walk. (Lepidoptera: Geometridae), a resurgent looper pest of tea

摘要

The effectiveness of two common natural enemies viz., Crysoperla carnea and Bracon brevicornis against Hyposidra infixaria was evaluated. C. carnea showed high preference to H. infixaria as compared to B. brevicornis and consumed more number of eggs. B. brevicornis did not found the larvae of H. infixaria as a favourable host. Biological activity of different neem formulations against Hyposidra infixaria indicated 100% mortality of the pest on tenth day after treatment with Econeem @ 4 ml/lit.