| The effects of nine chemical herbicides, butachlor, metolachlor, trifluralin, fenoxaprop-p-ethyl, acetochlor, butralin, quinofop-P-Ethyl, cyhalofop-butyl, oryzalin, on the mycelial growth of Rhizoctonia cerealis were studied. The results showed that only amides herbicides were able to inhibit the mycelial growth and the inhibition rate was concentration-dependent, the EC50 of metolachlor, acetochlor and butachlor,was 56, 83.5 and 142 mg·L-1, respectively, and wheels clones could be observed on the media with the herbicides; however, the inhibition rate of dinitroanilines and aryloxyphenoxy-propionate herbicides was low and their EC50 were beyond 1 000 mg·L-1. The amides herbicides changed the colony characteristics, while dinitroanilines herbicides did not. The results provided references to evaluate the effect of chemical herbicides applicatioin on the integrated pest management of wheat. |
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