Effects of Several Herbicides on Broad-Leaved Weeds in Wheat Fields
In this study,the aim was to determine control effects of several herbicides on broad-leaved weeds and their selectivity to wheat in fields.A field efficacy trial was conducted where seven herbicides,cyanazine 30％ SC,flumetsulam 10％ SC,pyroxasulfone 40％ SC,MCPA-isooctyl 86％ EC+bentazon 480 g/L AS,diflufenican·florasulam 16％ SC,florasulam 5％ OD and fluroxypyr 28.8％ EC,were sprayed to determin their control effect on broad-leaved weeds such as Galium spurium,Descurainia sophia,and Capsella bursa-pastoris.After 45 days of application,MCPA-isooctyl 86％ EC+bentazon 480 g/L AS and diflufenican·florasulam 16％ SC showed best control effect on total weeds,achieving fresh weight control effects of 93.05％ and 95.65％,respectively.Meanwhile,cyanazine 30％ SC and pyroxasulfone 40％ SC assessd little control effect on total weeds,achieving fresh weight control effects of 93.05％ and 95.65％,respectively.However,cyanazine 30％ SC and pyroxasulfone 40％ SC had excellent preemergent effects on weeds being delayed emergence,primarily Humulus scandens.Wheat injuryed caused by fluroxypyr 28.8％ EC and MCPA-isooctyl 86％ EC+bentazon 480 g/L AS,which may be linked to the application of difenoconazole.Other herbicides treatments have no significant adverse effects on wheat growth.In summary,control effects of these seven herbicides on broad-leaved weeds were quite different.MCPA-isooctyl 86％ EC at 387.0 g/hm2+bentazon 480 g/L AS at 720 g/hm2 and diflufenican·florasulam 16％ SC at 120 g/hm2 showed an excellent control effect on all weeds,and had a good application prospect in annual broad-leaved weeds control by spraying in weed pre-emergence and wheat green-up stages.
万方数据
维普
