关键词: 细蠓, 库蠓, 非吸血蠓, 青藏公路

Abstract: Objective:Studying on population composition,population trends and harm degree of midges in the part district along Qingzang Highway.Methods:Catching midges by waving the net.Results:There were genus Leptoconops,genus Culicoidts and genus non-blood-sucking midges in Ge'ermu,Nachitai and Tuotuohe,Leptoconops was superior in number(93.96%),the second was non-blood-sucking midges and third was Culicoidts.As the increase of elevation,Leptoconops went up in number and non-blood-sucking midges and Culicoidts went down.Tuotuohe was the most serious,and almost all of them were Leptoconops,the activity density was fairly higher from 10∶00 to 20∶00,with the most from 14∶00 to 17∶00;The infestation of Nachitai was the second,and they emerged from 10∶00 to 19∶00,also with Leptoconops as the dominant,higher density at 11∶00-13∶00;The density of midges in Ge'ermu was lower than in Tuotuohe and Nachitai,but from 10∶00 to 21∶00,there were Leptoconops,Culicoidts and non-blood-sucking midges to bite and annoy.Conclusion:This investigation has provided the science basis for controlling the midges.