不同时期单次施药对江苏丘陵地区稻茬麦田杂草的控制效果

Control Effect of Single Dose Application on Weeds during Different Period in Rice Stubble Wheat Field Jiangsu Hilly Region

为明确不同时期单次施药对麦田杂草的防治效果,以江苏丘陵地区稻茬麦田杂草为研究对象,选用7种常见除草剂,按不同用量及组合分别在小麦播后苗前、冬前及春季3个时期进行单次施用。结果表明,在江苏丘陵地区稻茬麦田播后苗前选择48%吡酰·异丙隆悬浮剂(SC)150~200 mL/667 m^(2)、33%氟噻·吡酰·呋SC 80 mL/667 m^(2)或55%吡酰·异丙隆SC 170 mL/667 m^(2)进行单次土壤封闭处理,冬前选择48%吡酰·异丙隆SC 175 mL/667 m^(2)+30 g/L甲基二磺隆可分散油悬浮剂(OD)25 mL/667 m^(2)或48%吡酰·异丙隆SC 175 mL/667 m^(2)+15%炔草酯可湿性粉剂30 mL/667 m^(2),无论土壤封闭或者冬前茎叶处理,单次施药均可达到很好的防治效果,且安全性较高;而相同药剂组合春季用药对杂草防除效果低于播后苗前土壤封闭及冬前茎叶处理。因此江苏丘陵地区稻茬麦田选用上述药剂配方或组合,进行封闭处理或冬前茎叶单次施药,能较好控制杂草危害。

It was the aim to clarify the control effect of a single dose application on weeds in different period.We took weeds as the research object in rice stubble wheat fields of Jiangsu hilly region,selected seven common herbicides,and applied them with different dosages and combinations of a single dose at pre-emergence stage,pre-winter stage and spring.The results showed that it could achieve good control effect on weeds and selectivity to wheat with a single dose application at pre-emergence stage in rice stubble wheat fields of Jiangsu hilly region,and the herbicides included diflufenican·isoproturon 48%SC at 150~200 mL/667 m^(2),flufenican·diflufenican·flurtamone 33%SC at 80 mL/667 m^(2) and diflufenican·isoproterone 55%SC at 170 mL/667 m^(2);And the herbicides which were applied with a single dose at pre-or post-emergence stage played the same effect,including diflufenican·isoproturon 48%SC at 175 mL/667 m^(2)+mesosulfuron-methyl 30 g/L OD at 25 mL/667 m^(2) or diflufenican·isoproturon 48%SC at 175 mL/667 m^(2)+clodinafop-propargyl 15%WP at 30 mL/667 m^(2).However,the control effect of the same combination of herbicides on weed applicated in spring was lower than that applicated at pre-or post-emergence stage.Therefore,it could better control weed infestation by applying the above mentioned herbicides with a single dose at pre-or post-emergence stage in rice stubble wheat fields of Jiangsu hilly region.