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《Acta Botanica Boreali-occidentalia Sinica》 2005-10
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Preliminary Study of Pesticidal Bio-activities of Ligusticum sinense Extracts

WAN Chuan-xing~(1,2),LI Guang-ze~(1*),HE Jun~1,FENG Jun-tao~1,CHEN An-liang~1,ZHANG Xing~1 (1 The Center of Biorational Pesticide Research and Development,Northwest Sci-Tech University of Agriculture and Forestry,Yangling,Shaanxi 712100,China;2 College of Botany,Tarim University,Alar,Xinjiang 843300,China)  
Drop method,conical flask fumigation and leaf disc method were adopted to study the contact-poisoning,fumigating and food-refusing bioactivities of Ligusticum sinense Oliv.Extracts to Mythimna separata Walker and Plutella xylostella L.as well as preliminarily explore their inhibiting effects and toxic symptoms and action modes to the growth and development of Tenebrio molitor L.pupae.The results indicated that of the extracts obtained by different extracting solvents,the extract extracted by cold acetone showed a higher poisoning bioactivity;the extract extracted by acetone showed higher contact-poisoning and fumigating bioactivities to three-instar Mythimna separata Walker and Plutella xylostella L.pupae with its LD_(50) standing at 0.062 3 mg dry plant sample per per papa and 0.150 2 mg dry plant sample per papa in 24 hours,and its LC_(50) standing at 24.342 2 mg dry plant sample per papa and 10.601 5 mg dry plant sample per papa in 12 hours,respectively;it had inhibiting effects to the growth and development of Tenebrio molitor L.pupae with its ID_(50) standing at 6.515 7 mg dry plant sample per papa;after having been poisoned,Mythimna separata Walker showed such symptoms as excitement,convulsion and paralysis early or late and finally died;its inhibiting effects to the growth and development of were similar to those of juvenile hormones.
【Fund】: 国家“十五”攻关重大专项(2002BA516A04)
【CateGory Index】: S482.39;
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