Effect of Pre-Emergent Herbicides on Weed Control and Wheat Yield in Fields of Jiangsu Hilly Area
In this work,we designed three single herbicides including pretilachlor·isoproturon 60％WP at 150,200 g/667 m2 and diflufenican 30％SC at 30 mL/667 m2 and three one-to-one mixture herbicides combinations including pretilachlor·isoproturon 60％WP at 150 g/667 m2+diflufenican 30％SC at 20,25,30 mL/667 m2,and also set up herbicide check free.In order to screen the optimal combination of pre-emergent herbicides suitable for wheat fields in Jiangsu hilly areas,field experiment was conducted to assess the efficacy of different pre-emergent herbicides in controlling weeds while ensuring wheat safety in 2022.The results showed that control effect of one-to-one mixture herbicides combinations was obviously higher than that of single herbicides and CK.All of one-to-one mixture herbicides combinations were more than 90％.And their yield were also significant higher with 400 kg/667 m2.Plant control effects of pretilachlor·isoproturon 60％WP at 150 g/667 m2+diflufenican 30％SC at 20 mL/667 m2 sprayed at pre-emergence stage on total weeds were all over 93％after 35,70,105 days,and the fresh weight control effect was over 98％after 105 days.There was no significant difference observed in weed control between the aforementioned herbicides combination and the other two one-to-one mixture herbicides combinations.These three combinations exhibited no adverse effects on wheat safety and yield wheat.Therefore,it was the optimal weeding measure to spray pretilachlor·isoproturon 60％WP at 150 g/667 m2+diflufenican 30％SC at 20 mL/667 m2 in wheat fields of Jiangsu hilly areas during pre-emergence stage.This weeding measure was deemed selectivity to wheat and represented a viable option for annual weed management in wheat fields.
wheatherbicidespray at pre-emergence stagecontrol effectselectivity
NETL
NSTL
万方数据
