Comparative efficacy of neemjeevan and monocrotophos against life stages of Dysdercus koenigii Fabr.

Efforts were taken to compare the toxicity of neemjeevan and monocrotophos on the biology of Dysdercus koenigii. Three different concentrations i.e. 0.01, 0.02 and 0.04% of neemjeevan (0.30EC) and 0.001, 0.002 and 0.004% of monocrotophos (Hilcron, 36 SL), were topically applied on the thorasic terga of 4^th nymphal instar by the help of micro-applicator and the observations were made up to longevity of mated and unmated adults. Mortality was dose dependent in both cases; however monocrotophos showed higher mortality than neemjeevan. Higher concentration of monocrotophos showed highest mortality i.e. 48.33 where in case of neemjeevan it was 41.66.