期刊论文

中文

湖南农业科学

1006-060X

2005

4

55-57

10.3969/j.issn.1006-060X.2005.04.026

德国拜耳作物科学有限责任公司资助项目

本校为第一机构

在明确了茶皂素对Bt细菌的生长无影响后,测定了茶皂素与微生物农药Bt防治蔬菜害虫小菜蛾的联合作用.茶皂素在1 000 mg/L和2 000 mg/L浓度下对Bt有显著的增效作用,对小菜蛾3龄和4龄幼虫的共毒系数分别为168.10、260.93和408.15、543.68.田间小区试验的结果也显示,加入1 000 mg/L茶皂素到Bt药液中,可明显提高对小菜蛾的防治效果,施药3 d以后,Bt 3 000倍加茶皂素处理的防治效果与Bt单剂1 000倍无显著差异,表明茶皂素对Bt防治小菜蛾具有显著的增效作用.这在生产实际中有一定的应用价值.

The co- effects of tea saponin mixed with microbio pesticide Bt on diamondback moth plutella xylostella （L.） were tested after no adverse effects of tea saponin on growth of Bt hypha was confirmed. There was significant synergistic actions on Bt with 1 000 mg/L and 2 000 mg/L tea saponin, the co - toxicity coefficients of Bt on the third and fourth instar larvae of plutella xylostella（L. ） were 168.10, 260.93 and 408.15, 543.68, respectively. Field trial showed that tea saponin added at concentrations of 1 000 ml/L, the mortality of plutell...