华南地区桔小实蝇抗药性动态监测

采用药膜法测定了广东、广西、海南、福建、云南等省(区)部分地区桔小实蝇Bactrocera dorsalis种群对敌百虫、高效氯氰菊酯、阿维菌素的抗性.结果表明,这些地区桔小实蝇种群中,对敌百虫的抗性有5个地区种群达到了中抗水平,抗性倍数高达27.42～16.42倍;4个地区种群抗性为低抗,抗性倍数为8.04～4.33倍,2个地区种群仍处于敏感水平;对高效氯氰菊酯的抗性有3个地区种群抗性达到了中抗水平,抗性倍数高达33.82～12.19倍,4个地区种群抗性为低抗,抗性倍数为9.27～4.14倍,4个地区种群仍处于敏感水平;对阿维菌素的抗性则有6个地区种群达到了中抗水平,抗性倍数高达24.00～10.52倍;4个地区种群抗性为低抗,抗性倍数为8.41～7.39倍,仅1个地区种群仍处于敏感水平.

Monitoring of Insecticide Resistance of Bactrocera dorsalis Adults in South China

The insecticide resistance of 11 colonies of oriental fruit fly,Bactrocera dorsalis(Hendel),collected from Guangdong,Guangxi,Hainan,Fujian,Yunnan Provinces to three insecticides was measured with the use of film residue method in laboratory.The results obtained from the test with trichlorphon showed that 5 colonies had developed moderate level of resistance with a resistant ratio from 27.42 to 16.42,while 4 colonies developed low level of resistance with a resistant ratio between 8.04 and 4.33,two populations have still susceptible.The resistance to alpharmethrin showed,three populations have already been middle level of resistance with a resistant ratio between 33.82 and 12.19,four populations have low level of resistance with a resistant ratio between 9.27 and 4.14,four populations have still susceptible.The resistance to abamectin showed,six populations have already been middle level of resistance with a resistant ratio between 24.00 and 10.52,four populations have low level of resistance with a resistant ratio between 8.41 and 7.39,only one populations has still susceptible.