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目的观察碳酸氢铵不同用量、方法和时间实验室杀灭钉螺效果。方法碳酸氢铵分别以干粉集中点投放、撒干粉、兑水喷洒3种方式施药,碳铵剂量100、200、300、400、500 g/m2,同时设0 g/m2对照,每组投放钉螺1 000只,然后地膜覆盖。试验后1、3、7、10、20、25、30、35、40、45 d各取出100只钉螺鉴别死活。浸杀法碳铵剂量0.01、0.05、0.1、0.5、1、2、3、4、5、7、10 g/L,同时设0 g/m2对照,每剂量组投放钉螺1 000只,试后1～10 d,每天各组取钉螺100只鉴别死活。结果碳铵集中点投放法1～3 d各组钉螺死亡87%～100%、干粉撒为83%～100%、兑水喷洒法为85%～100%,3种方法 7～45 d均为100%。浸杀法3 g/L剂量及以上,48 h钉螺死亡均为100%,2 g/L剂量仅10 d时达到100%。结论碳铵100～500 g/m2集中点投放、兑水喷洒、干粉撒覆盖和浸杀法2 g/L及以上用量均有很好的灭螺效果。
Objective To observe the different dosage of ammonium bicarbonate, methods and time laboratory kill snail effect. Methods Ammonium bicarbonate was put into dry powder concentration point, dried powder, water spray spraying three ways, ammonium bicarbonate dose 100,200,300,400,500 g / m2, while set 0 g / m2 control, each group put Oncomelania 1 000 only, then mulching. After the test, 1, 3, 7, 10, 20, 25, 30, 35, 40, Immersion method of ammonium bicarbonate dose 0.01,0.05,0.1,0.5,1,2,3,4,5,7,10 g / L, at the same time set 0 g / m2 control, each dose group administered 1,000 snails, after the test From 1 to 10 days, 100 snails were identified in each group. Results The results showed that the mortality of Oncomelania snails was 87% -100% in the group fed with ammonium bicarbonate for 1-3 days, that of dry powder was 83% -100%, that of watered spray was 85% -100%, and that of the three methods was 7-45 d 100%. Immersion method 3 g / L dose and above, 48 h snail death were 100%, 2 g / L dose only 10 d reached 100%. Conclusion Ammonium bicarbonate concentration of 100 ~ 500 g / m2 was put into operation. Spray watered water, powder coated and immersed 2 g / L and above all had good molluscicidal effect.