摘要
The non alkaloid contents were extracted from the root bark of Tripterygium wilfordii Hook. The results of bioassy showed that the non alkaloid extracts has abviously insectidal activities to imported cabbage worm ( Pieris rapae L.).LC 50 values of poisoning to the 5th instarts of Pieris rapae is 7.23 mg·L -1 . The values of medium antifeeding concentration (AFC 50 ) of the non alkaloid extracted against the 5th larval of Pieris rape is 11.34 mg·L -1 . Median narcosis dose (ND 50 ) is 15.54 μg/g.Median contact dose (LD 50 ) is 3.1079 μg/head. The non alkaloid extracts have no fumigant to insect. The main poisoning symptoms are that the tested insect showed paralysis and the epiderm of the larval turns black, the larval are dead at last.
The non alkaloid contents were extracted from the root bark of Tripterygium wilfordii Hook. The results of bioassy showed that the non alkaloid extracts has abviously insectidal activities to imported cabbage worm ( Pieris rapae L.).LC 50 values of poisoning to the 5th instarts of Pieris rapae is 7.23 mg·L -1 . The values of medium antifeeding concentration (AFC 50 ) of the non alkaloid extracted against the 5th larval of Pieris rape is 11.34 mg·L -1 . Median narcosis dose (ND 50 ) is 15.54 μg/g.Median contact dose (LD 50 ) is 3.1079 μg/head. The non alkaloid extracts have no fumigant to insect. The main poisoning symptoms are that the tested insect showed paralysis and the epiderm of the larval turns black, the larval are dead at last.
出处
《农药学学报》
CAS
CSCD
2000年第4期94-96,共3页
Chinese Journal of Pesticide Science
基金
高等学校博士学科专项科研基金!(0 0 3518)资助项目
杨陵农业科技开发基金!(98A19)
关键词
雷公藤
非生物碱
菜青虫
杀虫活性
总萜内酯
Tripterygium wilfordii Hook
Pieris rapae L.
Insecticidal activity
