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湖沼渠网型钉螺由于水系相通,钉螺随水流扩散是造成目前钉螺面积增大,血吸虫病疫情严重的一个突出问题。1991年龙湾镇渠道钉螺面积占有螺面积的46.6％(6034亩/12950亩),而且这些渠道全属定型,季节水位强,排灌兼用,也是钉螺扩散的枢纽,为了探索渠道灭螺效果,我们在1991年秋季灭螺中,对三种方法作灭螺效果比较,现报告如下。
Because of the connection of water system, the snail snail spread with water flow is a prominent issue that causes the snail snail area to increase at present, and the epidemic situation of schistosomiasis is serious. In 1991, the area of snail snail in channel of Longwan occupied 46.6% (6034 mu / 12950 mu) of snail area, and all of these channels were stereotyped. The water level in the seasons was strong, and both drainage and irrigation were the hubs for snail diffusion. In order to explore the effect of channel snailing, The snail in the fall of 1991, the three methods for the snail control effect, are as follows.