中文摘要：

目的研究敌百虫、敌杀死对日本三角涡虫（Dugesiajaponiea）摄食和再生的影响。方法每种农药设6个染毒组（敌百虫为0．90、1．10、1．32、1．58、1．89、2．27mg／L，敌杀死为0．83、1．00、1．20、1．44、1．73、2．10mg／L）和1个对照组进行急性毒性实验。每种农药各设5个染毒组（敌百虫摄食0．16、0．26、0．36、0．46、0．56mg／L，再生0．20、0．30、0．40、0．50、0．60mg／L；敌杀死为0．30、0．40、0．50、0．60、0．70mg／L）和1个对照组进行影响涡虫摄食与再生的实验。每组10条涡虫，进行3个平行。结果敌百虫和敌杀死对涡虫的24h、48h LC50分别是1．45mg／L和1．42mg／L、1．34mg／L和1．37mg／L。第1次喂食后，仅0．16mg/L、0．46mg／L敌百虫对涡虫的摄食影响显著（P〈0．05），第2、3次喂食各浓度敌百虫对涡虫的摄食影响显著（P〈0．05）；敌杀死对涡虫摄食的显著影响主要在第2、3次喂食后60min（P〈0．05）。术后60h、浓度〉10．20mg／L的敌百虫和术后54h、浓度≥0．40mg／L敌杀死对涡虫再生影响显著（P〈0．05）。术后90h，除0．60mg／L敌百虫染毒组和0．70mg／L敌杀死染毒组外，其他各组对涡虫再生影响不显著。结论敌百虫和敌杀死对涡虫摄食的显著影响主要在第2次喂食后，对再生的显著影响主要在术后78h和60h前。敌百虫对涡虫的急性毒性和对其摄食与再生的影响大于敌杀死。

英文摘要：

Objective To study the effects of trichlorphon and decis on the ingestion and regeneration of Dugesiajaponica. Methods The acute toxicity of triehlorphon at the doses of 0,0.90,1.10,1.32,1.58,1.89,2.27 mg/L and decis at 0,0.83,1.00,1.20, 1.44, 1.73,2.10 mg/L were studied on Dugesiajoponica. Trichlorphon at 0,0.16,0.26,0.36,0.46,0.56 mg/L for ingestion and 0,0.20,0.30,0.40,0.50,0.60 mg/L for regeneration, decis at 0,0.30,0.40,0.50,0.60,0.70 mg/L were studied for ingestion and regeneration of Dugesiajaponica. All the concentrations of trichlorphon and decis had three parallel sets, every group contained ten animals. Results The results showed that 24 h and 48 h LC50 were 1.45 mg/L, 1.34 mg/L and 1.42 mg/L, 1.37 mg/L for trichlorphon and decis,respectively. After the first feeding,only trichlorphon at 0.16 mg/L,0.46 mg/L affected the ingestion of Dugesiajaponica mainly （P〈0.05）;after the second and third feeding, all concentrations of triehlorphon affected the ingestion of Dugesiajaponica significantly （P〈0.05）;the effects of deeis on ingestion mainly happened after the second and third feeding. Sixty hours after operation,trichlorphon at concentrations higher than 0.20 mg/L and 54 h after operation,decis at concentrations higher than 0.40 mg/L affected markedly the regeneration of the animals. Ninety hours after regeneration,the animals exposed to all the concentrations of trichlorphon and decis except 0.60 mg/L and 0.70 mg/L,the effects were not significant. Conclusion Trichlorphon and decis may impact the ingestion of Dugesiajaponica mainly after the second feeding, and influence the regeneration within 78 h and 60 h after operation respectively. The acute toxicity and effects of trichlorphon on ingestion and regeneration of the animals are stronger compared with decis.