新疆额尔齐斯河下游北湾地区班布蚋季节消长调查

目的掌握新疆额尔齐斯河下游北湾地区班布蚋的季节消长。方法选择北湾地区3种生境，从4月开始至蚋活动消失，每月上、中、下旬3次，每次在日出前、后1h，日落前、后1h以及12：00、16：00共6次采用人帐诱进行蚋密度调查。结果蚋的密度与生境类型密切相关，以营院内人工树林环境密度最高为51．54％；其次为干旱的盐碱性荒漠为37．18％，在树林茂密、杂草丛生的生境中密度最低为11．28％。蚋的活动时间从4月中旬开始至8月上旬，6月为活动高峰时间，其最高峰在6月下旬，不同生境蚋季节活动曲线相似。结论6月是北湾地区蚋活动高峰时间，其危害十分严重，尤其是营院内人工树林环境。

Investigation on seasonal abundance of Simulium maculatum at Beiwan region, lower reaches of the Erqis river of Xinjiang province

Objective To study the seasonal abundance of Sirnuliurn maculaturn at Beiwan region. Methods Using bed-curtain to collect S. maculatum in 3 kinds of surroundings every ten days from April to the time that S. maculaturn disappeared. Collecting 6 times a day to investigate the density, and the trapping time was an hour before sunrise, an hour after sunrise, 12 o＇ clock, 16 o＇ clock, an hour before sunset and an hour after sunset. Results The density of S. maculatum was tied up with the varieties of surrounding. It＇s highest in artificial forest（51.54 % ）, lower in arid salina（37.18 % ）, the lowest in forest with thick weed（11. 28% ）. S. maculaturn appears from the middle ten-day of April to the first ten-day of August, and the peak is in the last ten-day of June. The seasonal abundance was similar in different surroundings. Conclusion The density of S. maculatum was very high and its damage was also vary serious in June, especially in artificial forest of Beiwan region.