Comparison Of Weeding Effects Of Several Kinds Of Herbicides In Wheat Field Of Xincao Farm

Field weeds have always been a difficult problem in agricultural management.There were many types of weeds in wheat fields,and the control effect of existing herbicides has declined,which has caused the current problem of weeds control in wheat fields.The multi-regional transfer operation of socialized agricultural machinery which provided a good way for the spread of weeds and the difficulty of weeds control had increased.The relatively fixed chemical control and herbicides formulation in a certain area which had led to a rapid increase in the selective resistance of weeds,the control effect of commonly used herbicides had decreased significantly,the difficulty and risk of weed control have become higher and higher.In this study,we selected ideal herbicides and optimized the their dosage to achieve the dual effect of effectively controlling weeds and avoiding wheat damage in wheat fields.The main conclusion of this study were as follows:1.In order to screen the ideal wheat soil sealing herbicide and its dosage,this research carried out the herbicide screening test.Combining the test results from safety of herbicides on wheat and their weeding effects,33%flufenacet·diflufenican·dinotefuran SC had a better soil sealing effect with its dosage of 120 mL/667m2,which was embodied in:?The effect on the number of wheat stems and tillers was minimal,and the number of stems and tillers was 361,100/667m2 at 60 days after application,which was significantly higher than the control;? The weeding effects on gramineous weeds was better,the plant and the fresh weight control effect at 90 days after application were 98.53%and 99.62%respectively,which were significantly higher than other treatments;?The weeding effects on broad-leaved weeds was better,the plant and fresh weight control effect at 90 days after application were 98.46%and 99.84%respectively,which were significantly higher than other treatments.2.In order to screen the ideal wheat stem-leaf spray herbicides and their dosage,this study carried out the herbicide screening test.Combining the test results from safety of herbicides on wheat and their weed control effect,6.9%fenoxaprop-P-ethyl EW with its dosage of 80 mL/667m2 and 50%diflufenican WP with its dosage of 40-60 g/667m2 had a better weedingl effects on gramineous weed in wheat fields.75%halosulfuron methyl WP with its dosage of 8 g/667m2 had a better effect on broad-leaved weeds in wheat fields.According to the test results of this study,it was concluded that:? 33%flufenacet·diflufenican·dinotefuran SC with its dosage of 120 mL/667m2 was an ideal soil sealing solution in wheat fields;? Both 6.9%fenoxaprop-P-ethyl EW with its dosage of 80 mL/667m2 was the ideal stem-leaf spray solution on gramineous weeds in wheat fields;?75%halosulfuron methyl WP with its dosage of 8 g/667m2 and 50%diflufenican WP with its dosage of 40-60 g/667m2 were an ideal solution stem-leaf spray solution on broad-leaved weeds in wheat fields.The soil sealing and stem-leaf spray treatment schemes which were selected in this study can basically solve the problem of weed control in wheat fields and provide a basis for technology promotion.