摘要
利用滤纸法、琼脂法和整株盆栽法研究了黑龙江省10个地区水田稻稗对丁草胺的敏感性，结果表明：3种方法检测同一地区的抗性指数不同，但趋势相同。经比较，琼脂法最为快捷、不受时间和空间影响，可用于稻稗对丁草胺敏感性水平的初步筛选；整株盆栽法较为准确，可对筛选后可疑稻稗进行敏感性测定。整株盆栽法测定牡丹江地区稻稗对丁草胺的敏感性最低，ED50为I136．5750ga．i．／hm2，抗性指数为5．42，产生了低等水平抗性；其他地区抗性指数在1．00～3．00之间，处于敏感阶段。
The sensitivity of rice and Echinochloa oryzicola collected from ten areas in paddy of Heilongjiang Province to butachlor was studied by methods using filter paper,agar, and pot methods. Different resistance indexes in the same area were obtained with the three methods but with identical trends. The agar method without the limitation of time and space is fast, and can be used for preliminary screening of sensitivity to butachlor in rice and E. oryzicola. The pot method is accurate and can be used assess the sensitivity of populations suspected of being resistant. The sensitivity of rice and E. oryz/co/a collected from Mudanjiang to butachlor was lowest when the pot method was used, with an estimated EDo of 1 136. 575 0 g a. i./hm2 and a resistence index of 5.42 （ low resistance level）. The resistance index of populations from other areas ranged between 1.00 - 3.00, corresponding to a the sensitive stage.
出处
《杂草科学》
2013年第4期21-24,共4页
Weed Science
关键词
稻稗
丁草胺
生物测定
敏感性
rice
Echinochloa oryzicola
butachlor
bioassay method
sensitivity
