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目的寻找和筛选新的高效、低毒又使用方便的杀螺剂,为现场防治提供新的杀螺措施。方法采集10种除草类药样,分别采用“浸泡法、喷洒法和撒粉法”进行室内杀螺试验,同时以清水作空白对照。结果通过初筛和复筛杀螺实验观察,其中浸泡法中显示一定杀螺效果的有A-004、B-008和B-009 3种药样,其24h、48h和72h的LC50分别为5.991 mg/L、1.598 mg/L和1.699mg/L;5.449 mg/L、2.728 mg/L和2.257mg/L;5.870 mg/L、3.787 mg/L和1.876mg/L;在喷洒法中显示杀螺效果较好的为B-009药样,其3d、7d和15d的LC50为4.949 g/m2、2.415 g/m2和1.701mg/L;而在撒粉法实验中显示较好杀螺效果的A-001和A-002 2种药样,其3d、7d和15d的LC50为分别为7.112 g/m2、2.498 g/m2和2.020 g/m2;4.717 g/m2、1.579 g/m2和1.093 g/m2。结论 10种除草类药样在各灭螺方法中均显示了一定的灭螺活性,但在浸泡和喷洒法中,各药样4.0mg/L(g/m2)及以下浓度和剂量的杀螺效果并不理想,其杀螺率一般或较低,而A-001和A-002 2种药样则在撒粉法中显示了较好的杀螺效果,故值得进一步研制和探索。
Objective To find and screen new high efficiency, low toxicity and easy to use snail killing agents to provide new snail control measures for field control. Methods Ten herbicide-like samples were collected and tested for indoor snail by “soaking method, spraying method and dusting method ”, respectively. The results showed that the LC50 of A-004, B-008 and B-009 in the immersion method were 5.991 mg / L, 1.598 mg / L and 1.699 mg / L; 5.449 mg / L, 2.728 mg / L and 2.257 mg / L; 5.870 mg / L, 3.787 mg / L and 1.876 mg / L; The better spirochetes were B-009, with LC50 of 4.949 g / m2, 2.415 g / m2 and 1.701 mg / L at 3d, 7d and 15d, respectively. A-001 and A-002 showed LC50 of 7.112 g / m2, 2.498 g / m2 and 2.020 g / m2 at 3d, 7d and 15d, 4.717 g / m2, 1.579 g / m2 and 1.093 g / m2. CONCLUSIONS The 10 herbicidal herbicides showed certain activity of controlling molluscicides in each method of molluscicidal activity. However, in soaking and spraying methods, 4.0 mg / L (g / m2) The effect is not ideal, the kill spiral rate is lower or lower, while A-001 and A-002 two kinds of drug samples in the dusting method shows a better snail effect, it is worth further research and exploration.