Sensitivity of Digitaria sanguinalis population to two acetyl-CoA carboxylase-inhibiting herbicides in Chongqing area
To effectively and scientifically control Digitaria sanguinalis(L.)Scop.in Chongqing area,the ED50 values and relative resistance index(RI)of different D.sanguinalis populations to two acetyl-CoA carboxylase-inhibiting herbicides were determined by whole plant dose-response method.The results showed that different D.sanguinalis populations had different degrees of resistance to metamifop and clethodim(except for relatively sensitive population).The ED50 value of DJSP02 to metamifop and clethodim was 377.31 g/hm2 and 37.97 g/hm2,showing moderate resistance(RI=8.78)and low resistance(RI=2.10),respectively.The ED5o values of DJSP03 to metamifop and clethodim respectively was 136.84 g/hm2 and 136.93 g/hm2,showing low resistance(RI=3.18)and moderate resistance(RI=7.56),respectively.DJSP02 and DJSP03 have developed positive cross-resistance to metamifop and clethodim.Therefore,in order to control the resistant D.sanguinalis population in Chongqing area,it is appropriate to mix or alternate with other types of herbicides.
Digitaria sanguinalisacetyl-CoA carboxylase-inhibiting herbicidesensitivityChongqing area
NETL
NSTL
万方数据
