Categorized: Environmentally safe pesticides and pesticide risk management
PHYTOCHEMICAL BASE BIO PESTICIDE IN PAKISTAN
2Shahid Hussain 1Syed Ali Ameer 1Muhammad Raza and
1Office of the deputy Director Agriculture Skardu
2Department of plant protection malir halt Karachi
This invention relates to a process for the preparation of a biopesticide 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 50% (w/v) of fraction to 1-5 parts by weight of an emulsifier and 45 to 94 parts by weight of solvent to Obtain the biopesticide containing 10 to 50% (w/v) of plant extract or fract one of Callistemon, 1 to 5% of emulsifier and 45 to 94% of solvent.