丙草胺与4种磺酰脲类除草剂混用对稻苗安全性的影响  

Effect of Pretilachlor Mixed with 4 Sulfonylurea Herbicides on Safety of Rice Seedling

作　　者：柏连阳[1] 吴秋明 罗宽[1] 谭小平[1] 姚文昌[1] 周小毛[1] 

机构地区：[1]湖南农业大学植物保护学院,湖南长沙410128 [2]湖南省湘西自治州农业局,湖南吉首416000

出　　处：《湖南农业大学学报（自然科学版）》2003年第3期220-222,共3页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：国家自然科学基金资助项目(30070506);湖南省自然科学基金资助项目(99JJY20020);湖南省教育厅青年科学基金资助项目

摘　　要：室内测定了丙草胺分别与磺酰脲类除草剂甲磺隆、苄嘧磺隆、醚磺隆和吡嘧磺隆混用后,一叶一心期稻苗抑制50%株高的使用浓度(IC50)和抑制10%株高的使用浓度(IC10),并用共害系数(CHC)对混用组合安全性的联合作用进行了评价.结果表明:所有混配处理的CHC10均小于12.0,表现出强烈的解毒效应;不同混用处理的CHC50值差异很大,丙草胺与甲磺隆混用的CHC50均小于25.0,解毒效应显著.丙草胺与苄嘧磺隆混配的CHC50为26.1～167.8,丙草胺与吡嘧磺隆混用的CHC50为52.2～115.5,丙草胺与醚磺隆混用的CHC50为80.0～110.2.This paper is an attempt to evaluate,the IC50 and IC10 of pretilachlor and its mixtures with metsulfuronmethyl,bensulfuronmethyl,cinosulfuron,and pyrazosuronethyl respectively to rice seedling of singleleaf and in addition classify the jointeffect of security into different sorts of effect according to the coharmness coefficient. The results of the experiment shows that CHC10 of all mixtures trial treatment are below 12.0,and all these mixtures turn out to have intense antidote effect; CHC50 of different mixtures differ greatly from each other.The CHC50 of the mixtures of pretilachlor and metsulfuronmethyl are below 25.0,and these mixtures also turn out to have intense antidote effect.The CHC50 of the mixtures of pretilachlor and bensulfuronmethy1 are 26.1～167.8;the CHC50 of the mixtures of pretilachlor and pyrazosuronethyl is 52.2～115.5; the CHC50 of the mixtures of pretilachlor and cinosulfuron is 80.0～110.2.

关 键 词：丙草胺 磺酰脲类 除草剂 混用 水稻 安全性 联合作用 

分 类 号：S482.44[农业科学—农药学]