The extraction and separation of effective component from the bark of Melia azedarach L.and its bioactivity have been studied in this dissertation. The effecting factors of different extraction methods, including supercritical carbon dioxide extraction, ultrasonic extraction, microwave assistant extraction and traditional solvent extraction, and the optimum extraction conditions were investigated. Study on antifeeding and toxic effects of extractives and effective component from the bark of Melia azedarach ...