格尔木地区蚋类研究

Study on black flies in Geermu district

目的调查了解青海省格尔木地区蚋类的种类和活动规律。方法网捕法和草叶检幼法。结果调查发现蚋科4亚属9种,即真蚋亚属Esimulium 1种,蚋亚属Simulium 1种,特蚋亚属Tetisimulium 2种和维蚋亚属Wilhelmia 5种。全年蚋类是从5月出现活动,7月密度指数急剧增高达全年活动最高峰,8月至9月密度指数呈下降趋势,在10月活动消失;7月全天活动有2个高峰,分别在10:00和16:00～17:00,前峰高于后峰。结论初步掌握了蚋类的种类和活动规律,为科学防治提供了依据。

Objective To investigate species and bionomics habit of black flies in Geermu district. Methods The specimens were collected with net trap and leaves inspecting. Results 9 species of black flies were found. They were belonged to 4 Subgenus respectively： Esimulium（ 1 species）,Simulium （1 species）, Tetisimulium （2 species） and Wilhelmia （5 species） . The Simuliidae insect appeared in May,the density index of Simuliidae insect in July was the highest in a year. From August to September, the density index got lower. The Simuliidae insects disappeared in October. It had two activity peaks in July in Geermu city. The first was at ten o＇clock in the morning, the second was from four to five o＇clock in afternoon. The first peak was higher than that of the second. Conclusion The species and bionomics habit of black flies in Geermu district is basically grasped. This investigation has provided scientific evidence for controlling and killing black flies.