关键词: 阿维菌素, 地里纤恙螨, 热带珊瑚岛, 灭效试验

Abstract: Objective:To illustrate the killing effects of avermectin on Leptotrombium deliense on tropical coral islands.Methods:Laboratory tests were done by soaking and spraying Leptotrombium deliense,while field test by spraying a specific spot on tropical coral islands.Results:The LC₅₀ of 1.8% avermectin was of 0.000361,the 95%credible domain of which was between 0.000263 and 0.000496.With0.0018% and 0.0036% avermectin,85.4% and 90.2% Leptotrombium deliense were killed respectively in 15 days test,and field tests showed that the mean killing ratios were 80.5% and 81.9%.Conclusions:Avermectin was an effective insecticide in killing Leptotrombium deliensein tropical coral islands and 0.0018% concertration was suggested.