文献类型： 外文期刊

作者： Feng, X ¹ ; Chen, HY ¹ ; Lu, LH ¹ ;

作者机构： 1.Guangdong Acad Agr Sci, Plant Protect Res Inst, Guangzhou 510640, Peoples R China

关键词： abamectin;Bacillus thuringiensis

期刊名称：MANAGEMENT OF DIAMONDBACK MOTH AND OTHER CRUCIFER PESTS

ISSN：

年卷期： 2004 年

页码：

收录情况： SCI

摘要： The diamondback moth (DBM), Plutella xylostella (L.) (Lepidoptera: Yponomeutidae) is one of the most serious and important pests of crucifers in many parts of China, particularly in South China. DBM has developed resistance to all of chemical insecticides commonly used in vegetable growing regions of Guangdong Province. The development of resistance to avermectin and a microbial insecticide, Bacillus thuringiensis Berliner has been observed in the laboratory and field populations of DBM for at least eight years since 1992. The field study indicated that DBM resistance of field populations in both Shenzhen and Guangzhou regions to abamectin, Bacillus thuringiensis and chlorfluazuron increased greatly in the past decade and that the tolerance of the Shenzhen DBM population was higher for all three agents compared with the Guangzhou DBM population. However, there has been no significant change in resistance to dichlorvos, methomyl, fenvalerate and cartap in DBM since 1992. Laboratory studies indicated that susceptible DBM strain (SS) to abamectin had gradually developed resistance when DBM was treated regularly with sub lethal dosage of the preparation. After 20 generations, the induced resistance level was as high as 11.55-fold compared with susceptible. This case is in accordance with the situation in which field population gave rise to high level of resistance (2-, 12-, and 20-fold, in 1992, 1994 and 1996) to abamectin preparation. There was no cross-resistance between abamectin and Bt (Bacillus thuringiensis), dichlorvos, fenvalerate or cartap, but some cross-resistance was found between abamectin and chlorfluazuron. Synergists like SV1 and TPP enhanced the toxicity of abamectin to DBM field strains. Therefore, based on both field and laboratory studies, insecticide rotation has been recommended to vegetable growers and at present, the problem of DBM resistance has been alleviated. Devastation by DBM has been controlled in South China after an insecticide resistance management program was conducted to guide insecticidal application.