氰氟草酯和精噁唑禾草灵对三叶浮萍的毒性效应  

Toxicity of Fenoxaprop-ethy and Cyhalofop-butyl l on Lemma Paucicostata

作　　者：黄帆[1] 郭正元[1] 徐珍[1] 

机构地区：[1]湖南农业大学农业环保研究所,湖南长沙410128

出　　处：《中国农学通报》2006年第11期406-409,共4页Chinese Agricultural Science Bulletin

基　　金：农业部药检所合作项目"10%精噁唑禾草灵氰氟草酯的残留毒理研究"(20050630)

摘　　要：为了正确评价精噁唑禾草灵·氰氟草酯混配制剂的生态环境效应,采用水培实验的方法研究了精噁唑禾草灵和氰氟草酯对三叶浮萍(LemmaPaucicostata)的单一毒性和联合毒性效应。结果表明,精噁唑禾草灵和氰氟草酯对三叶浮萍96h的IC50分别为3.33mg/L和5.04mg/L,精噁唑禾草灵·氰氟草酯混合处理液对三叶浮萍96h的IC50为3.14mg/L,对联合毒性进行评价,显示出明显的协同效应。精噁唑禾草灵、氰氟草酯及其联合处理均不同程度地减少了浮萍体内的叶绿素a、叶绿素b的含量,影响作用呈良好的浓度(剂量)-效应关系。In order to assess the bioenvironmental effect of a mixed herbicide which composed by Fenoxaprop-ethyl and Cyhalofop-butyl correctly, the single toxic and joint toxic effects of them on Lemma Paucicostata were studied. The results showed that the IC50 of Fenoxaprop - ethyl and Cyhalofop -butyl to Lemma Paucicostata for 96 h were 3.33 and 5.04 mg/L respectively, the IC50 of joint toxicity of them for 96 h to Lemma Paucicostata was 3.14 mg/L. The additive index （AI） was 1.566, the combined toxicities were the synergism action. The content of chlorophyll a and chlorophyll b of Lemma Paucicostata both affected by the single and joint toxicity of Fenoxaprop -ethyl and Cyhalofop-butyl with the concentration increased.

关 键 词：精噁唑禾草灵 氰氟草酯 三叶浮萍 联合毒性 

分 类 号：S482.2[农业科学—农药学]