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[目的]了解城市郊区密集散村间残存钉螺复燃的特点,评价钉螺控制措施的效果。[方法]2005~2007年,采用环境清理,氯硝柳胺药杀,局部硬化等方法在马巷蔬菜地有螺地块进行灭螺,分别采用系统抽样结合环境抽样的方法进行灭前和灭后钉螺密度调查。[结果]马巷蔬菜地有螺地块钉螺最高密度在地块中央,处于密集散村中间。第1次灭前有螺面积4.8万m2、活螺密度为1.20只/0.11 m2;经过连续3次灭螺后,调查43框,未发现活螺,有螺面积下降率和活螺密度下降率均为100.00%。33次灭螺合计投入38.5万元。[结论]马巷蔬菜地残存钉螺的控制效果明显,但灭螺成本较高。
[Objective] The aim of this study was to understand the characteristics of residual snail re-ignition among dense scattered villages in urban suburbs and to evaluate the effect of snail control measures. [Method] From 2005 to 2007, the methods of environmental clean-up, niclosamide killing and local hardening were used to kill snails in the vegetable plots with vegetable fields in Ma Lane. The methods of systematic sampling combined with environmental sampling Post-nails density survey. [Result] The highest density of snail in Malou vegetable field was in the center of the plot and was in the middle of intensive village. Before the first extinction, the area of snail was 48,000 m2 and the live lobe density was 1.20 /0.11 m2. After 3 consecutive snails inquired into the area, 43 snails were not found, and the rate of decrease of snail area and the rate of reduction of live snail density All 100.00%. 33 snails total investment 385,000 yuan. [Conclusion] The control effect of surviving snail in vegetable field of Ma Lane was obvious, but the cost of snail killing was higher.