Fecundity and Fertility Control of Red Cotton Bug (Dysdercus Cingulatus) By the Extract of Psoralea Corylifolia

For determining the effect of extracts on the fecundity and fertility on Dysdercuscingulatus, newly emerged adult females were separated and 1µl of each extract at below than LC50 concentrations were applied against Dysdercuscingulatus, it was observed that the rate of egg laying and hatching were inhibited considerably. It was noticed that 1 and 1.5% concentrations caused complete fecundity as well as fertility in the extracts. In lower concentrations also the extract showed quite effective causing loss in fecundity to a considerable extent, but the rate of fertility obtained is not much encouraging. Sterility index of the treated insect showed that there is significant difference from the control and untreated sets.