摘要
目的评价60%四聚乙醛水分散粒剂的室内和现场杀螺效果。方法按照《农药登记用杀钉螺剂药效试验方法和评价》(NY/T 1617-2008)要求,采用60%四聚乙醛水分散粒剂(MWG)室内和现场喷洒法灭螺,并与50%氯硝柳胺乙醇胺盐可湿性粉剂(WPN)进行效果比较。结果使用60%四聚乙醛水分散粒剂室内喷洒法灭螺,1、3和7 d LC50值分别为0.312(0.271~0.360)、0.216(0.190~0.245)和0.177(0.160~0.196)g/m^2,0.900 g/m^2浓度7 d后实验室钉螺死亡率为98.00%。使用0.900 g/m^2浓度现场喷洒7 d,岳阳草洲和江陵县河滩现场钉螺死亡率分别为90.91%和85.12%。与50%氯硝柳胺乙醇胺盐可湿性粉剂对照组(1.000 g/m^2)相比,岳阳草洲现场0.900、1.800g/m^2MWG组钉螺死亡率差异均无统计学意义(χ^2=2.555、3.340,P均>0.05);江陵县河滩现场1.800 g/m^2MWG组钉螺死亡率差异无统计学意义(χ^2=0.989,P>0.05)。结论60%四聚乙醛水分散粒剂室内和现场喷洒试验使用0.900 g/m^2浓度,其药效均达到《农药登记用杀钉螺剂药效试验方法和评价》(NY/T 1617-2008)规定的登记标准,具有较好的实验室和现场杀螺效果,为新型高效、使用方便的灭螺药物剂型。
Objective To evaluate the molluscicidal effect of 60%metaldehyde water dispersible granules(MWG) against Oncomelania hupensis snails in laboratory and field settings.Methods By the standard procedures specified in Efficacy Test Methods and Evaluation of Molluscicide for Pesticide Registration(NY/T 1617-2008),we conducted the experiment in both laboratory and field setting using MWG against the snails via immersing and spraying methods.Then the mulluscicidal effect was compared with that of 50%wettable powder of niclosamide ethanolamine salt(WPN).Results In the laboratory,LC50(s)at 1,3 and 7 d was 0.312(0.271~0.360),0.216(0.190~0.245)and 0.177(0.160~0.196)g/m^2,respectively,by MWG immersing.The mortality rate of snails was 98.00%by spraying MWG for 7 days in dose 0.900 g/m^2 in the laboratory setting,and respectively 90.91%and 85.12%by the identical protocol applied to the field settings at grass beaches and flood plains in Yueyang and Jiangling County.The difference was insignificant for the mortality rate of snails when comparing the dosage of 50%WPN(1.000 g/m^2)with that of 60%MWG(0.900 g/m^2 and 1.800 g/m^2 administered at the grass beaches in Yueyang County,χ^2=2.555,3.340;P>0.05,respectively)and(1.800 g/m^2 administered at the flood plains in Jiangling County(χ^2=0.989,P>0.05).Conclusion Spraying 60%MWG in dose of 0.900 g/m^2 in both laboratory and field setting can lead to the requirements specified in Efficacy Test Methods and Evaluation of Molluscicide for Pesticide Registration,which suggests that this protocol may be a novel and potent molluscicide with easy performance.
作者
元艺
单晓伟
李博
何汇
YUAN Yi;SHAN Xiao-wei;LI Bo;HE Hui(Institute of Schistosomiasis Control,Hubei Center for Disease Control and Prevention,Wuhan 430079,China)
出处
《热带病与寄生虫学》
2020年第3期165-168,共4页
Journal of Tropical Diseases and Parasitology
基金
国家高技术研究发展(863)计划(2004AA2Z3560)
国家科技重大专项(2012ZX10004909)
湖北省科技支撑计划项目(2015BCA315)
湖北省卫健委科研项目(WJ2019D002)。
关键词
四聚乙醛
水分散粒剂
杀螺效果
湖北钉螺
Metaldehyde WG
Water dispersible granule
Molluscicidal effect
Oncomelania hupensis
