【摘要】 目的为确切评价杀螟丹的杀螺效果,探讨适宜现场的杀螺剂量,并为全面推广应用提供科学依据。方法于灭螺季节选择有螺的内陆沟渠和江滩,采用不同浓度(剂量)进行浸泡法和喷洒法现场灭螺试验。结果用杀螟丹1.0mg/L、2.0mg/L在现场沟渠浸泡24 h～72 h的钉螺校正死亡率,分别为87.5％～97.6％和89.7％～100.0％,均接近氯硝柳肢的杀螺效果(P>0.05);而用1.0、20g/m~2杀螟丹喷洒3d、7d和15d后,其钉螺的校正死亡率为76.6％～80.3％和92.9％～94.3％,均低于氯硝柳胺的杀螺效果(P<0.05).结论应用杀螟丹杀灭现场钉螺,无论在浸泡法和喷洒法中均显示了较好的杀灭的作用,其杀螺率随剂量的增加和接触药液时间的延长而增高,即呈现出明显的剂量与时间效应关系,但该药对现场非靶生物的毒性还有待作进一步的观察和研究。更多还原

【Abstract】 To estimate the molluscicide effect and explore the suitable dosage of mollusci- cide used in field and provide the scientific theory to use this molluscicide widely in field. Methods The molluscicide effect of xinshamindan was observed by immersing and spraying methods of different dosages (concentration) in canal and marshland. Results After snails were separatly immersed with xinshamindan by the dosages of 1.0mg/L and 2.0mg/L for 24 hours to 72 hours, the adjusted mortality was 87.5% to 97.6% and 89.7% to 100% and there was no significant difference in molluscicide effect between xinshamindan and niclosmide (P>0.05). But the adjusted mortality was only 76.6% to 80.3% and 92.9% to 94.3%, after snails were sprayed by the dosages of 1.0mg/L and 2.0mg/L for 3days to 15days, the molluscicide effect of xin- shamindan was lower than that of niclosamide (P<0.05). Conclusion The molluscicide effect of xinshamindan was good not only by the immersing method but also by the spraying method, and the mortality was increasing with the higher dosage and the longer contact time, and there was significant correlation between the mortality and dosage and contact time. However, the toxicity to other creature needed to surveyed and study further more.更多还原