摘要
The resistance and cross-resistance of Scirpus juncoides Roxb.to ALS-inhibiting herbicides were tested to provide theoretical basis for effectively control Scirpus juncoides Roxb.and rational use of herbicides.To identify the resistance and crossresistance of 19 populations from nine areas in Heilongjiang Province to four ALS-inhibiting herbicides by agar method and the whole-plant assay.The results are as the followings,the two bioassay methods had good correlation,the resistance indexes in the same area were different by two means,but resistant level was the same,similarity up to 89.5%.The resistant rates to pyrazosulfuronethyl,bensulfuron-methyl,penoxsulam and pyribenzoxim were 26.3%,36.8%,36.1%and 21.1%,respectively.Shangzhi populations evolved the highest level of resistance to pyrazosulfuron-methyl with a resistance index of 15.56.Shangzhi,Tonghe,Fangzheng and Jixi populations showed cross-resistance to four ALS-inhibiting herbicides,accounting for 26.3%.The resistance of Scirpus juncoides Roxb.to four ALS-inhibiting herbicides in Heilongjiang paddy field was low to moderate,five populations showed cross-resistance to four ALS-inhibiting herbicides.
The resistance and cross-resistance of Scirpus juncoides Roxb. to ALS-inhibiting herbicides were tested to provide theoretical basis for effectively control Scirpus juncoides Roxb. and rational use of herbicides. To identify the resistance and crossresistance of 19 populations from nine areas in Heilongjiang Province to four ALS-inhibiting herbicides by agar method and the whole-plant assay. The results are as the followings, the two bioassay methods had good correlation, the resistance indexes in the same area were different by two means, but resistant level was the same, similarity up to 89.5%. The resistant rates to pyrazosulfuronethyl, bensulfuron-methyl, penoxsulam and pyribenzoxim were 26.3%, 36.8%, 36.1% and 21.1%, respectively. Shangzhi populations evolved the highest level of resistance to pyrazosulfuron-methyl with a resistance index of 15.56. Shangzhi, Tonghe, Fangzheng and Jixi populations showed cross-resistance to four ALS-inhibiting herbicides, accounting for 26.3%. The resistance of Scirpus juncoides Roxb. to four ALS-inhibiting herbicides in Heilongjiang paddy field was low to moderate, five populations showed cross-resistance to four ALS-inhibiting herbicides.
基金
Supported by the National Key Research and Development Program of China(2017YFD0200307)
