A total of six experiments were conducted over a two-year period (2018, 2019) at the University of Guelph Ridgetown Campus to assess the efficacy of various herbicides applied postemergence (POST) for the control of c...A total of six experiments were conducted over a two-year period (2018, 2019) at the University of Guelph Ridgetown Campus to assess the efficacy of various herbicides applied postemergence (POST) for the control of common chickweed in winter wheat. Fluroxypyr/bromoxynil/MCPA, pyrasulfotole/bromoxynil,pyrasulfotole/bromoxynil/fluroxypyr,pyrasulfotole/bromoxynil/thiencarbazone, pyrasulfotole/bromoxynil/thiencarbazone + MCPA ester, tolpyralate and fluroxypyr/halauxifen + MCPA EHE, applied POST, controlled common chickweed only 5% - 42% at 2 weeks after treatment (WAT) and 1% - 23% at 4 WAT and resulted in common chickweed density and biomass that was similar to non-treated weedy control. Fluroxypyr/halauxifen + pyroxsulam + MCPA EHE, applied POST, provided 57% - 82% control of common chickweed and reduced density 93% and biomass 98% compared to the non-treated control. Thifensulfuron/tribenuron, thifensulfuron/tribenuron + MCPA ester, thifensulfuron/tribenuron + fluroxypyr + MCPA ester, tribenuron + thiencarbazone, and tribenuron + thiencarbazone + MCPA ester, applied POST, controlled common chickweed 98% - 100% and reduced common chickweed density 96% - 98% and common chickweed biomass 99%. Based on these results, herbicide treatments which contained tribenuron including thifensulfuron/tribenuron, thifensulfuron/tribenuron + MCPA ester, thifensulfuron/tribenuron + fluroxypyr + MCPA ester, tribenuron + thiencarbazone, and tribenuron + thiencarbazone + MCPA ester were the most efficacious for the control of common chickweed in wheat. In addition, fluroxypyr/halauxifen + pyroxsulam + MCPA EHE, applied POST, can provide adequate control of common chickweed in winter wheat.展开更多
通过田间药效试验,比较不同除草剂对当前南疆地区冬麦田播娘蒿、萹蓄、硬草等杂草的防除效果,为科学、安全、高效应用除草剂提供依据。结果表明,药后50 d,10%苯磺隆可湿性粉剂18.0 g a.i./hm2+5%唑啉草酯·炔草酯乳油37.5 g a.i./hm...通过田间药效试验,比较不同除草剂对当前南疆地区冬麦田播娘蒿、萹蓄、硬草等杂草的防除效果,为科学、安全、高效应用除草剂提供依据。结果表明,药后50 d,10%苯磺隆可湿性粉剂18.0 g a.i./hm2+5%唑啉草酯·炔草酯乳油37.5 g a.i./hm2、75%苯磺隆水分散粒剂18.0 g a.i./hm2+10%乙羧氟草醚乳油12.0 g a.i./hm2+5%唑啉草酯·炔草酯乳油37.5 g a.i./hm2、37%炔·苄·唑草酮可湿性粉剂166.5 g a.i./hm2对播娘蒿的株防效、鲜质量防效均为100%,对萹蓄的鲜质量防效均在92%以上,对硬草的株防效、鲜质量防效均在88%以上,且对小麦生长安全。展开更多
10%苯磺隆WP 15～22.5 g a.i./hm2和5%唑啉草酯+炔草酸EC30～60 g a.i./hm2对冬小麦生长安全。其中,10%苯磺隆WP15 g a.i./hm2与5%唑啉草酯+炔草酸EC 45～60 g a.i./hm2对新疆南疆地区冬麦田阔叶杂草和禾本科杂草有较好的防除效果。采...10%苯磺隆WP 15～22.5 g a.i./hm2和5%唑啉草酯+炔草酸EC30～60 g a.i./hm2对冬小麦生长安全。其中,10%苯磺隆WP15 g a.i./hm2与5%唑啉草酯+炔草酸EC 45～60 g a.i./hm2对新疆南疆地区冬麦田阔叶杂草和禾本科杂草有较好的防除效果。采用二次稀释的方法,在冬小麦拔节前用药。展开更多
为明确7%双氟·炔草酯可分散油悬浮剂对南疆冬麦田混合发生杂草的防除效果及合适施用剂量,以7%双氟·炔草酯可分散油悬浮剂不同剂量喷雾,以10%苯磺隆可湿性粉剂+5%(唑啉草酯+炔草酯)为对照药剂,调查药后30、45 d的杂草株数及鲜...为明确7%双氟·炔草酯可分散油悬浮剂对南疆冬麦田混合发生杂草的防除效果及合适施用剂量,以7%双氟·炔草酯可分散油悬浮剂不同剂量喷雾,以10%苯磺隆可湿性粉剂+5%(唑啉草酯+炔草酯)为对照药剂,调查药后30、45 d的杂草株数及鲜质量,计算防效。结果表明,药后45 d,7%双氟·炔草酯可分散油悬浮剂52.5~84 m L a.i./hm^2对播娘蒿和硬草的株防效及鲜质量防效均在98%以上,对萹蓄的鲜质量防效均在85%以上,且对小麦安全。因此,在播娘蒿、硬草和萹蓄等杂草混合发生的冬麦田可选用7%双氟·炔草酯可分散油悬浮剂,用量推荐用量为52.5~84.0 m L a.i./hm^2。展开更多
文摘A total of six experiments were conducted over a two-year period (2018, 2019) at the University of Guelph Ridgetown Campus to assess the efficacy of various herbicides applied postemergence (POST) for the control of common chickweed in winter wheat. Fluroxypyr/bromoxynil/MCPA, pyrasulfotole/bromoxynil,pyrasulfotole/bromoxynil/fluroxypyr,pyrasulfotole/bromoxynil/thiencarbazone, pyrasulfotole/bromoxynil/thiencarbazone + MCPA ester, tolpyralate and fluroxypyr/halauxifen + MCPA EHE, applied POST, controlled common chickweed only 5% - 42% at 2 weeks after treatment (WAT) and 1% - 23% at 4 WAT and resulted in common chickweed density and biomass that was similar to non-treated weedy control. Fluroxypyr/halauxifen + pyroxsulam + MCPA EHE, applied POST, provided 57% - 82% control of common chickweed and reduced density 93% and biomass 98% compared to the non-treated control. Thifensulfuron/tribenuron, thifensulfuron/tribenuron + MCPA ester, thifensulfuron/tribenuron + fluroxypyr + MCPA ester, tribenuron + thiencarbazone, and tribenuron + thiencarbazone + MCPA ester, applied POST, controlled common chickweed 98% - 100% and reduced common chickweed density 96% - 98% and common chickweed biomass 99%. Based on these results, herbicide treatments which contained tribenuron including thifensulfuron/tribenuron, thifensulfuron/tribenuron + MCPA ester, thifensulfuron/tribenuron + fluroxypyr + MCPA ester, tribenuron + thiencarbazone, and tribenuron + thiencarbazone + MCPA ester were the most efficacious for the control of common chickweed in wheat. In addition, fluroxypyr/halauxifen + pyroxsulam + MCPA EHE, applied POST, can provide adequate control of common chickweed in winter wheat.
文摘通过田间药效试验,比较不同除草剂对当前南疆地区冬麦田播娘蒿、萹蓄、硬草等杂草的防除效果,为科学、安全、高效应用除草剂提供依据。结果表明,药后50 d,10%苯磺隆可湿性粉剂18.0 g a.i./hm2+5%唑啉草酯·炔草酯乳油37.5 g a.i./hm2、75%苯磺隆水分散粒剂18.0 g a.i./hm2+10%乙羧氟草醚乳油12.0 g a.i./hm2+5%唑啉草酯·炔草酯乳油37.5 g a.i./hm2、37%炔·苄·唑草酮可湿性粉剂166.5 g a.i./hm2对播娘蒿的株防效、鲜质量防效均为100%,对萹蓄的鲜质量防效均在92%以上,对硬草的株防效、鲜质量防效均在88%以上,且对小麦生长安全。
文摘10%苯磺隆WP 15～22.5 g a.i./hm2和5%唑啉草酯+炔草酸EC30～60 g a.i./hm2对冬小麦生长安全。其中,10%苯磺隆WP15 g a.i./hm2与5%唑啉草酯+炔草酸EC 45～60 g a.i./hm2对新疆南疆地区冬麦田阔叶杂草和禾本科杂草有较好的防除效果。采用二次稀释的方法,在冬小麦拔节前用药。
文摘为明确7%双氟·炔草酯可分散油悬浮剂对南疆冬麦田混合发生杂草的防除效果及合适施用剂量,以7%双氟·炔草酯可分散油悬浮剂不同剂量喷雾,以10%苯磺隆可湿性粉剂+5%(唑啉草酯+炔草酯)为对照药剂,调查药后30、45 d的杂草株数及鲜质量,计算防效。结果表明,药后45 d,7%双氟·炔草酯可分散油悬浮剂52.5~84 m L a.i./hm^2对播娘蒿和硬草的株防效及鲜质量防效均在98%以上,对萹蓄的鲜质量防效均在85%以上,且对小麦安全。因此,在播娘蒿、硬草和萹蓄等杂草混合发生的冬麦田可选用7%双氟·炔草酯可分散油悬浮剂,用量推荐用量为52.5~84.0 m L a.i./hm^2。
