BigPatents India

This invention relates to a process for the preparation of a biopesticides containing a plant extract or fractions of callistemon comprising the steps of: a) extraction of dried ground plant leaves of callistemon, b) concentrating the polar extract, c) dissolving the concentrated extract in a non polar solvent, followed by filtration and concentration, d) dissolving the concentrated residual in aqueous acetone, subjecting the mixture to filtration to obtain a semi brown solid (fraction), e) adding 10 to 15% (w/v) of fraction to 1-5 parts by weight of a wetting agent and 45 to 89 parts by weight of a carrier to obtain the biopesticide containing 10 to 50% (w/v) of extract or fractions of callistemon, 1 to 5% of a wetting agent and 45 to 89% of carrier.