雷公藤总生物碱对小菜蛾的生物活性.pdf

浙江农业学报 Acta Agriculturae Zhejiangensis18(5):348~350,200
雷公藤总生物碱对小菜蛾的生物活性
徐红星,吕仲贤,陈建明,陈列忠,俞晓平
(浙江省农业科学院植物保护与微牛物研究所,浙江杭州310021)
摘要:研究了雷公藤总生物碱对小菜峨的杀虫活性利作用方式。结果表明,公藤总生物碱对2龄小莱峨
有很强的拒食、毒杀和生长抑制作用。选择性与非选择性拒食中浓度AFCs分別为42.44mg/L和46.6mg/L,
72h时毒杀中浓度IC:o为3885mg/,生长抑制中浓度为FCso为123.3mg/1.。
键词:雷公膝;总生物碱;小藁蛾;生物活性
中图分类号:0629.3;S767.3t7
文献标识仍:A
文章编号:1004-1524(2006)05-0348-03
Bioactivities of alkaloids extracted from Tripterygium wilfordii against the larvae of
diamond-backed moth, Plutella xylostella
XU Hong-xing, LU Zong-xian, CHEN Jian-ming, CHEN Lie-zhong, YU Xiao-pin
Institute of Plant Protection and Microbiology, hejiang Academy of grcudralsciences, Hang hou 310021, China)
Abstract: Insecticidal activities of the alkaloids extracted from Tripterygium wilfordii against Plutella xylostella were con
ducted in the paper. The results showed that alkaloids had obviously insecticidal activities to the larvae of P. xylostella
The medium antifeedance concentration (AFCS of alkaloids against the 2nd instar larvae of P. xylostella were4244 m
I, and 46. 6 mg/I. in choice and non-choice test, respectively. ICso value of poisoning to the 2nd instar larvae of P
xylostella was 388.5 mg/l. after being treated for 72 hours. The medium growth inhibiting concentration(E.Cso)of alka
loids against 2nd instar larvae was 123.3 mg/I
Key words: tripterygium wi/ordii; alkaloids; bioactivities; Plutella xylostella
小菜蛾( Plutella xylostella)属鳞翅H,菜蛾入的研究。迄今知有明显杀虫作用的植物
科,是世界性卜字花科蔬菜的主要害虫之?,全至少有1000多种。我国常用的主要植物源农药
世外每年防治费用约需要10亿美元,造成庐量资源有印棟、闹羊花、苦皮藤、ピ豆、百部、雷公
失4000多万吨。小菜峨对一些杀以剂的藤、花蒿等近种植物叫。雷公滕
重抗性给防治带米了极大困难2。植物性杀虫( Tripterygiun wilfordii Hook.f)属矛科需公藤属
剂山」对人帝安全、話虫不易产生抗药性、选择植物,又名断肠単、菜以约,我国主要分布于长江
生强和在日然环境中易于降解等特点而受到了
中下游地区,在很早以前就用于医学和防治多种
泛的重视并吸引更多的科学家对此进行更深害虫,是有名的杀虫植物之-S。虽然对公藤
的杀虫活性研究较多,但迄今还未见雷公藤杀虫
收稿凵期:200
剂产品问世。为此,我们对公藤根皮总4牛.物碱
基金项日:浙江省重大项日(02110253,2004(C12015,2006C:12032
进行∫提取分离,研究其对小菜峨的杀虫活性,
作者简介:徐红星(1977-),男,浙江建德人,助理硏究员,主要
为进·步开发諾公藤杀虫剂提供依据。
从事害虫综合治、牛物农药的研制等研究工作。E-mail: xuhui
C yahoo. com. cn
通讯作者E-mail:yxp(@colu.ecdu.cn