麦田常用除草剂组合运用策略效果对比初探

Preliminary Study on the Effect of Herbicide Combination in Wheat Field

通过对土壤封闭、茎叶处理、封闭+茎叶3种麦田杂草防除方式不同除草剂组合以及不同施药方式(常规和飞防)除草效果进行比较。结果表明:常规施药方式防效高于飞防方式。在常规施药的封闭处理中,33%吡氟·氟噻·呋SC1500mL/hm^2处理防效最好,药后60d对禾本科和阔叶杂草的株防效分别为99.31%、96.74%;茎叶处理中,50%异丙隆WP2250g/hm^2+30g/L甲基二磺隆OD(世玛)450mL/hm^2+10%苯磺隆WP450g/hm^2处理防效最好,药后60d对禾本科和阔叶杂草的株防效分别为93.79%、84.56%;封闭+茎叶处理中,33%吡氟·氟噻·呋SC1500mL/hm^2+5%唑啉草酯EC1800mL/hm^2处理防效最好,第2次药后60d对禾本科和阔叶杂草的株防效分别为99.31%、97.22%。综合来看,使用33%吡氟·氟噻·呋SC1500mL/hm^2+5%唑啉草酯EC1800mL/hm^2进行封闭+茎叶处理的除草方式,在小麦播后1d和小麦3~4叶期(杂草2~4叶期)时进行"一封一杀"的2次除草法,进行常规喷雾施药,能较好控制小麦田多种杂草,持效期长,是当前小麦田杂草控制的首选组合策略方式。

The effects of different herbicide combinations and different application methods(conventional and flying control)were compared among three methods of weeds control in wheat field:soil sealing treatment,stem and leaf treatment,soil sealing&stem and leaf treatment.Experimental results show that the effectiveness of conventional application mode is better than fly control.In the conventional soil sealing treatment,33% diflufenican-flufenacet-flusilarizonaole SC had the best weeds control,the weeds control effect on grass weeds&broad-leaf weeds is 99.31%、96.74% after 60 days.In the stem and leaf treatment,50% isoproturon WP&30 g/l mesosulfuron OD&10% tribenuron methly WP had the best weeds control,the weeds control effect on grass weeds&broad-leaf weeds is 93.79%、84.56%after 60 days.In the soil sealing&stem and leaf treatment,33% diflufenican-flufenacet-flusilarizonaole SC&5%pinoxaden EC had the best weeds control,the weeds control effect on grass weeds&broad-leaf weeds is 99.31%、97.22% after 60 days.Taken together,choose conventional method to spray 33% diflufenican-flufenacet-flusilarizonaole SC&5% pinoxaden EC can control a variety of weeds in wheat field,get a long period of effective.It is the preferred combination strategy for weeds control in wheat field.