Ben-Rong You, Yi-Xin Huang, Heng-Guang Hu, De-Rong Hang, Shi-Bao Jing, Qiao-Fang Mei
Luhe County Center for Disease Control and Prevention, Jiangsu Province, Nanjing 211500, China.
Key Laboratory of National Health and Family Planning Commission on Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Wuxi, Jiangsu Province, China.
Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi. 2016 May 20;28(3):237-240. doi: 10.16250/j.32.1374.2016046.
To evaluate the molluscicidal effect of niclosamide ethanolamine salt powder-granula (PG) against .
The molluscicidal experiment was carried out by the dusting method with niclosamide ethanolamine salt 4% PG. The experiments were respectively done in the laboratory and the tidal flats wetlands. At the same time, the niclosamide ethanolamine salt 4% dustable powder (DP) was as the control group. The single blind method was used for the quality control. The corrected mortality and the median lethal concentration (LC) were compared between PG and DP in the molluscicidal experiment of the laboratory. The corrected mortality and the reduced rate of snails'density were compared between PG and DP in the tidal flats wetlands.
The mortality rates of the snails were 96.67% and 100% respectively on 1 d after dusting 4.0 g/m of 4% PG and 2.0 g/m of 4% DP in the laboratory. The results showed that the mortality rates of the snails were higher with 4% DP than 4% PG in each dosage ( = 3.60, < 0.01). The LC of 1d, 3 d, 7 d after dusting the molluscicide also showed that the molluscicidal effects of DP were better than PG. The corrected mortality rates were 91.71%, 92.91%, 90.57%, 85.33% and 71.09%, 90.11%, 90.13%, 85.26% on 3 d, 7 d, 15 d, 30 d after dusting with 4% PG and 4% DP, respectively, in the fields. Statistics showed that the mortality rates of snails were higher on 3 d, 7 d after dusting with PG than DP (χ = 731.57, χ = 25.90, < 0.01), but there were no significant differences between PG and DP on 15d, 30d after dusting (χ = 0.53, χ = 0.01, > 0.05).
4% PG has both the adsorption of powder and the penetrability of the granules. The molluscicidal effects of 4% PG and 4% DP are almost the same. However, the drift of the powder was still not effectively controlled. This problem need to be further studied.
评价氯硝柳胺乙醇胺盐粉粒剂（PG）对[具体对象未给出]的杀螺效果。
采用4%氯硝柳胺乙醇胺盐粉粒剂喷粉法进行杀螺试验。试验分别在实验室和滩涂湿地进行。同时，以4%氯硝柳胺乙醇胺盐可湿性粉剂（DP）作为对照组。采用单盲法进行质量控制。在实验室杀螺试验中比较PG组和DP组的校正死亡率和半数致死浓度（LC）。在滩涂湿地比较PG组和DP组的校正死亡率和螺密度降低率。
在实验室中，分别以4.0 g/m²的4% PG和2.0 g/m²的4% DP喷粉后1天，螺的死亡率分别为96.67%和100%。结果表明，各剂量下4% DP组螺的死亡率均高于4% PG组（χ² = 3.60，P < 0.01）。施药后1天、3天、7天的LC也表明DP的杀螺效果优于PG。在田间，分别以4% PG和4% DP喷粉后3天、7天、15天、30天的校正死亡率分别为91.71%、92.91%、90.57%、85.33%和71.09%、90.11%、90.13%、85.26%。统计显示，喷粉后3天、7天PG组螺的死亡率高于DP组（χ² = 731.57，χ² = 25.90，P < 0.01），但喷粉后15天、30天PG组和DP组之间无显著差异（χ² = 0.53，χ² = 0.01，P > 0.05）。
4% PG兼具粉剂的吸附性和颗粒剂的渗透性。4% PG和4% DP的杀螺效果基本相同。然而，粉剂的漂移问题仍未得到有效控制。这一问题有待进一步研究。
