PESTICIDE COMPOSITION OF INSECTICIDAL ACTIVITY FOR PADDY RICE INSECTS

摘要

PURPOSE: An insecticidal composition against paddy rice insects is provided to ensure excellent insecticidal activity to small brown plant hopper, blown plant hopper, and Sogatella furcifera. CONSTITUTION: An insecticidal composition against paddy rice insets contains Sebastiania corniculata organic solvent extract, 8-hydroxyquinolinie, or 8-hydroxyquinoline derivatives. The organic solvent extract is methanol extract, ethanol extract, hexane extract, or ethyl acetate extract of Sebastiania corniculata. A method for preparing 8-hydroxyquinoline comprises: a step of dipping Sebastiania corniculata in methanol at 20-30C for 24-72 hours; a step of filtering and concentrating at 40-50C under a vacuum condition for 6-8 hours to prepare methanol extract; a step of dissolving the methanol extract in 800-1500ml of distilled water and adding 800-1500ml of hexane to separate an aqueous layer and a hexane layer; and a step of adding 800-1500ml of chloroform to the aqueous layer and mixing the aqueous layer and chloroform.