Reduction Technology of Fenclorim Coating to Cultivated Rice Injury Caused by Pretilachlor
In this work,the concentrations of fenclorim coating were 4％,7％,10％,13％and 16％,and fenclorim coating free was check(CK).To explore technology for efficient control of weedy rice and selection to cultivated rice,we studied reduction technology of fenclorim coating to cultivated rice injury caused by pretilachlor and potential for weedy rice control,and then analysised effect of fenclorim coating with different concentrations on seed germination,seedling growth and development and weight of stem-leaf and root of cultivated rice,especially determined effect of pretilachlor on control efficacy of fenclorim coating with the concentration of 10％against weedy rice.The results showed that fenclorim coating with different concentrations had no significant effect on seed germination,seedling growth and development of cultivated rice,except that fenclorim coating with the highest concentration of 16％had significant effect on seedling growth and development.Fenclorim coating with the concentration of 10％had the best protective effect on cultivated rice duing to the inhibition rates of fresh weight of stem,leaf and root were the lowest.And fenclorim coating with the concentration of 10％had no significant effect on the efficacy of pretilachlor against weedy rice.Therefore,fenclorim coating with the concentration of 10％was recommended to be applied in cultivated rice fields,and pretilachlor was used to control weedy rice before seedling after sowing.
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