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目的评价荣芽杀灭钉螺的效果及其对野生鱼的急性的毒性,为推广应用提供科学依据。方法采用浸杀和喷洒法在现场进行灭螺试验,同时用野生鲫鱼进行鱼急性毒试验。结果现场荣芽25g/m3浸杀施药2、3和5d后,螺校正死亡率分别为31.52%、88.04%和94.67%;荣芽12g/m2喷洒3、7和15d后,钉螺校正死亡率分别为77.22%、85.71%和88.06%,鱼毒显示荣芽25g/m3施药7d后未见死鱼情况。结论荣芽具有较强杀螺作用,对鱼类安全。杀螺机理和对非靶生物的毒性有待进一步研究阐明。
Objective To evaluate the effect of Rongya in killing snails and their acute toxicity to wild fish, so as to provide a scientific basis for popularization and application. Methods The snail test was conducted in the field by immersion and spraying method, and the acute toxicity test of fish was conducted with wild crucian carp. Results After the sprouts were sprayed for 2, 3 and 5 days, the correct mortalities of sprout were 31.52%, 88.04% and 94.67%, respectively. After the sprouts were sprayed at 12 g / m2 for 3, 7 and 15 days, the corrected mortality of snails Respectively, 77.22%, 85.71% and 88.06%, respectively. No dead fish was found after 7 days of spraying 25g / m3 of Rongdu sprouts. Conclusion Rongya has a strong role in killing snails, fish safety. The mechanism of snail killing and toxicity to non-target organisms needs to be further elucidated.