Efficacy of Plant Extracts Against Lipaphis Erysimi and its Parasitoid, Diaeretiella Rapae

Among plant extracts, 1.5% extracts of Murraya koenigi+ Mentha spicata was found to be most effective recording 80.0% mortality after 72 hrs of treatment followed by remaining plant extracts. On the basis of relative mean mortality of all the extracts, the order of toxicity at 1.5% concentration after 72 hrs was: Murraya koenigi +Mentha spicata > Murraya koenigi + Sapindus mukorossi > Vitex negundo + Sapindus mukorossi > Mentha spicata > Acorus calamus) > Melia azedarach > Bambusa arundinacea > Vitex negundo > Murraya koenigii > Ageratum conyzoides > Sapindus mukorossi > Vitex negundo + Mentha spicata > Adhatoda vasica > Murraya koenigii+ Vitex negundo > Vitex negundo+ Murraya koenigii > Datura innoxia > Parthenium hysterophorous. Ten plant extracts at 0.5, 1.0 & 1.5%) were evaluated against the braconid parasitoid, Diaeretiella rapae in vitro. Among them 0.5% concentrations of M. koenigii + M. spicata proved to be least toxic and M. azedarach proved to be most toxic.