温度对杀虫丁杀螺效果的影响  

THE IMPACT OF TEMPERATURE ON MOLLUSCACIDAL EFFECT OF "SHACHONGDING

作　　者：朱丹[1] 谢法仙[1] 鲍子平[1] 朱达培[1] 倪传华[1] 

机构地区：[1]中国疾病预防控制中心寄生虫病预防控制所,上海200025

出　　处：《中国寄生虫病防治杂志》2002年第3期178-179,共2页Chinese Journal of Parasitic Disease Control

基　　金：国家"九 .五"科技攻关项目 (No.96- 90 6- 0 4 - 0 5)

摘　　要：目的　观察在不同温度下杀虫丁的灭螺效果 ,以指导其在现场中的合理使用。　方法　用脱氯自然水将杀虫丁从 32 mg/ L 等比稀释至 0 .0 16 mg/ L 的不同浓度各 30 0 ml分别置于玻璃缸中 ,每缸放入 1袋含 30只钉螺的尼龙袋 ,分别浸泡 2 4 h和 4 8h,同时设氯硝柳胺和清水为对照 ,分别在 30℃、2 5℃和 2 0℃下观察杀虫丁的杀螺效果 ,试验结果用 POMS软件进行统计分析。　结果　在实验温度为 30℃、2 5℃和 2 0℃时 ,钉螺在不同浓度的杀虫丁中浸泡 2 4 h和 4 8h的死亡率均有显著性差异 (P均 <0 .0 1) ,钉螺浸杀 2 4 h时 ,杀虫丁的 L C50 依次为 0 .4 4 mg/ L、1.16 mg/ L 和 2 .74 mg/ L,杀虫丁与氯硝柳胺的毒力比分别为 0 .12、0 .0 9和 0 .0 7;钉螺浸杀 4 8h时 ,杀虫丁的 L C50 依次为 0 .13mg/ L、0 .2 7mg/ L和 0 .74mg/ L,杀虫丁与氯硝柳胺的毒力比分别为 0 .4 6、0 .2 7和 0 .11。　结论　随着温度的下降杀虫丁的杀螺效果明显减弱 。Objective To evaluate the impact of different temperature on the molluscacidal effect of 'Shachongding' [(dimethylamine) trithiacyclohexane hydrochloride]. Methods The immersed molluscaciding were conducted under different temperature, i.e., 30℃?25℃ and 20℃, with different concentration of 'Shachongding', i.e., from 32 mg/L to 0.016 mg/L diluted in geometrical progression and different duration of immersing, i.e., 24 hours and 48 hours. Niclosamide and water were taken as control. Results The LC 50 of 'Shachongding' in 30 ℃?25 ℃ and 20 ℃ was 0.44 mg/L, 1.16 mg/L and 2.74 mg/L in 24 hour group whereas was 0.13 mg/L, 0.27 mg/L and 0.74 mg/L in 48 hour group, respectively. The toxicity ratio of 'Shachongding' to Niclosamide was 0.12 mg/L, 0.09 mg/L and 0.07 mg/L in 24 hours group, 0.46 mg/L 0.27 mg/L and 0.11 mg/L in 48 hours group, respectively. The snail mortalities of 'Shachongding' have statistically significant difference in 30 ℃?25 ℃ and 20 ℃ with different immersing duration (24 hours and 48 hours). Conclosion The toxic ratio of 'Shachongding' is low and decreased greatly as immersion temperature dropped, 'Shachongding' had the great molluscacidal effect at 30 ℃.

关 键 词：氯硝柳胺 杀虫丁 灭螺 温度 

分 类 号：R184.38[医药卫生—流行病学]