[云南省山区LDS的杀螺效果]

[Molluscicidal effect of LDS in mountainous areas of Yunnan Province].

作者信息

Li Bing-Gui, Li Wen-Bao, Dong Yi, Xiong Meng-Tao, Feng Xi-Guang, Mu Liang-Xian, Tian Shu-Hui, Li Ping, Xiong Kang, Dong Xing-Qi

机构信息

Anti-schistosomiasis Station of Heqing County, Yunnan Province, Heqing 671500, China.

出版信息

Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi. 2011 Aug;23(4):395-401.

PMID:22164850

Abstract

OBJECTIVE

To observe the molluscicidal effect of a novel molluscicide, salt of quinoid-2', 5-dichloro-4'-nitrosalicylanilide (LDS) on Oncomelania hupensis in laboratory and field of mountainous areas of Yunnan Province.

METHODS

With the immersion method, 10% LDS with concentrations of 0.1, 0.2, 0.4, 0.6, 0.8 mg/L was tested, and 50% niclosamide (WPN) with the concentration of 2 mg/L as well as fresh water were tested as the controls. The molluscicidal effects of 24, 48, 72 h were observed in lab and the field. With the insufflation method and powdering method, 10% LDS with doses of 0.2, 0.4, 0.6, 0.8, 1.0 g/m2 was tested and 50% WPN with the dose of 2 g/m2 as well as fresh water were tested as the controls. The molluscicidal effects of 1, 3, 7 d were observed in lab and the field.

RESULTS

At the room temperature of 25-26 degrees C and water temperature of 21-22 degrees C, when exposed for 72 h by the immersion method, the snail death rates of above-mentioned five concentrations of LDS and WPN as well as fresh water were 93.33%, 100%, 100%, 100%, 100%, 100% and 6.67%, respectively in lab. At the field temperature of 18-28 degrees C and water temperature of 18-23 degrees C, when exposed for 72 h by the immersion method, the snail death rates of above-mentioned five concentrations of LDS and WPN as well as fresh water were 91.11%,100%,100%, 100%, 100%, 100% and 3.33%, respectively in the field. When exposed for 7 d by the insufflation method, the snail death rates of five above-mentioned dosages of LDS and WPN as well as fresh water were 90.00%, 94.00%, 96.00% 99.00%, 99.00%, 94.00% and 6.00%, respectively in lab and 80.00%, 82.14%, 88.35%, 90.83%, 96.55%, 92.56% and 4.55%, respectively in the field. When exposed for 7 d by the powdering method, the snail death rates were 74.77%, 88.89%, 94.50%, 90.38%, 92.17%, 90.38% and 4.55%, respectively in the field.

CONCLUSION

LDS has a good molluscicidal effect on Oncomelania hupensis in mountainous areas.

摘要

目的

观察新型杀螺剂醌式-2',5-二氯-4'-亚硝基水杨酰苯胺盐（LDS）在云南省山区实验室及现场对钉螺的杀灭效果。

方法

采用浸泡法，测试浓度为0.1、0.2、0.4、0.6、0.8mg/L的10%LDS，以浓度为2mg/L的50%氯硝柳胺（WPN）及新鲜水作为对照。在实验室及现场观察24、48、72小时的杀螺效果。采用喷粉法和撒粉法，测试剂量为0.2、0.4、0.6、0.8、1.0g/m²的10%LDS，以剂量为2g/m²的50%WPN及新鲜水作为对照。在实验室及现场观察1、3、7天的杀螺效果。

结果

在室温25 - 26℃、水温21 - 22℃条件下，浸泡法暴露72小时，实验室中上述5种浓度的LDS及WPN和新鲜水组的钉螺死亡率分别为93.33%、100%、100%、100%、100%、100%和6.67%。在现场温度18 - 28℃、水温18 - 23℃条件下，浸泡法暴露72小时，现场中上述5种浓度的LDS及WPN和新鲜水组的钉螺死亡率分别为91.11%、100%、100%、100%、100%、100%和3.33%。喷粉法暴露7天，实验室中上述5种剂量的LDS及WPN和新鲜水组的钉螺死亡率分别为90.00%、94.00%、96.00%、99.00%、99.00%、94.00%和6.00%，现场分别为80.00%、82.14%、88.35%、90.83%、96.55%、92.56%和4.55%。撒粉法暴露7天，现场钉螺死亡率分别为74.77%、88.89%、94.50%、90.38%、92.17%、90.38%和4.55%。