%0 Journal Article %A GIA Tie-Wu %A SUN Le-Ping %A HONG Qing-Biao %A TAO Bo %A CAI Jian-Xin %A LI Yue-Sheng %A LIN Dan-Dan %A YU Xin-Ling %A ZHOU Xiao-Nong %T Field evaluation of a novel plant molluscicide“Luo-wei”against Oncomelania hupensisⅠMolluscicidal effect by the spraying method in lake and marshland regions %D 2013 %R %J Chinese Journal of Schistosomiasis Control %P 125- %V 25 %N 2 %X

Objective To evaluate the field effect of a novel plant molluscicide“Luo ?wei” (Tea ? seed distilled saponins, TDS)against Oncomelania hupensis in the lake and marshland regions. Methods A spraying experiment was carried out in the grassland of two schistosomiasis endemic counties,including Xingzi in Jiangxi Province and the Huarong in Hunan Province,to assess the molluscicidal effect of 4% TDS comparing with 50% wettable powder of niclosamide ethanolamine salt(WPN) . The χ2 test was used to examine the differences between regions,molluscicides,or days after spraying. Results Following 1,3,7,and 15 days of test,the snail mortality showed a simultaneous increase both in TDS group(70.43%-86.88%)and WPN group (70.21%-85.35%) . There is no significant difference between TDS and WPN of day 1,7 and 15(all P values > 0.05),but except for day 3(χ2 =3.910,P = 0.048) . By the end of day 15,the snail mortality for TDS was 86.53% in Xingzi and 88.28% in Hua? rong,while for WPN was 83.04% in Xingzi and 93.69% in Huarong respectively;the decline rate of snail density for TDS was 85.29% in Xingzi and 93.53% in Huarong,while for WPN was 85.29% in Xingzi and 93.53% in Huarong respectively. The adjust? ed mortality of different days ranged from 69.63% to 86.54% in the the TDS group,and 69.41% to 86.54% in the WPN group. Conclusion The molluscicidal effect of TDS by spraying is similar to that of WPN. It is time to popularize this new plant mollusci? cide(TDS)in a wider field.

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