论文部分内容阅读
目的 了解 4 %氯硝柳胺乙醇胺盐粉剂在丘陵山区的灭螺效果。方法 选择江苏宜兴丘陵山区 2处有螺环境为试验现场 ,分别采用手工撒粉法和动力喷粉法施药 ,4 %氯硝柳胺乙醇胺盐粉剂用量为 5 0 g/ m2。结果 手工撒粉现场先行割草清障处理 ,施药后 7、15、30 d,钉螺校正死亡率分别为 78.35 %、90 .96 %和 95 .5 2 % ;活螺密度下降率分别为 72 .6 6 %、94 .5 3%和 98.4 4 %。动力喷粉现场不作割草处理 ,喷粉后 3、7、15 d,钉螺校正死亡率分别为 91.73%、96 .2 2 %、99.2 9% ;活螺密度下降率分别为 94 .90 %、98.10 %、99.5 8%。喷粉法灭螺效果明显优于手工撒粉 ,差异有非常显著性(χ27d=12 .0 8,χ21 5d=7.89,P均 <0 .0 1)。结论 在丘陵山区水源缺乏、环境复杂 ,使用氯硝柳胺乙醇胺盐粉剂撒粉灭螺和喷粉灭螺均获良好效果 ,具有良好的应用前景
Objective To understand the snail-killing effect of 4% niclosamide ethanolamine powder in hilly area. Methods Two conch environment in the hilly and mountainous areas of Yixing, Jiangsu Province were chosen as experimental sites. The powder was sprayed by hand and the powder was sprayed by hand. The dosage of 4% niclosamide ethanolamine salt powder was 50 g / m2. Results The mowing obstacle clearance was firstly carried out on the site of hand dredging. The corrected mortality rates of snails were 78.35%, 90.96% and 95.52% at 7, 15 and 30 days after spraying respectively. The decreasing rates of live spiral density were 72 .6 6%, 94.53% and 98.4 4%. The dynamic spraying dust did not make mowing treatment at the site. The corrected mortality rates of snails were 91.73%, 96.22% and 99.29% on the 3rd, 7th, and 15th days after spraying. The decreasing rates of live spiral density were 94.90% 98.10%, 99.5 8%. Pollutant snail killing effect was significantly better than manual dusting, the difference was significant (χ27d = 12.08, χ21 5d = 7.89, P <0.01). Conclusions In the hilly and mountainous areas, there is a lack of water and the environment is complex. Both the niclosamide ethanolamine salt powder and the molluscicide snail have good effects and have good application prospects