为了找到更为安全高效环保的玉米苗后除草剂替代产品,2024年在安徽省巢湖市开展了验证2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂对玉米田杂草的药效、杀草谱及对玉米的安全性等田间试验。结果表明,2.6%苯唑草酮·噻酮磺隆可分散油...为了找到更为安全高效环保的玉米苗后除草剂替代产品,2024年在安徽省巢湖市开展了验证2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂对玉米田杂草的药效、杀草谱及对玉米的安全性等田间试验。结果表明,2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂可防除一年生禾本科杂草及绝大部分阔叶杂草。施用剂量为39~58.5 g a.i./hm^(2),在玉米3~6叶期兑水600 L/hm^(2)茎叶喷雾,药后30 d,其对各种杂草的株防效为87.0%~98.1%,鲜重防效达90.7%~99.6%,且对玉米生长安全,并有较好的增产效果。展开更多
近年来,玉米田杂草对烟嘧磺隆、莠去津已经产生了较高水平的抗药性,为找到更为安全高效环保的玉米苗后除草剂替代产品,2024年在安徽省巢湖市开展田间小区试验,以验证2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂(OD)对玉米田杂草的药效、...近年来,玉米田杂草对烟嘧磺隆、莠去津已经产生了较高水平的抗药性,为找到更为安全高效环保的玉米苗后除草剂替代产品,2024年在安徽省巢湖市开展田间小区试验,以验证2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂(OD)对玉米田杂草的药效、杀草谱及对玉米的安全性。结果表明,2.6%苯唑草酮·噻酮磺隆OD的杀草谱较广,可防除一年生禾本科杂草(马唐、稗)及绝大部分阔叶杂草(反枝苋、苘麻、空心莲子草和铁苋菜)。施药后30 d,2.6%苯唑草酮·噻酮磺隆OD处理对各种杂草的综合株防效为87.3%~98.2%,综合鲜重防效达90.7%~99.6%。2.6%苯唑草酮·噻酮磺隆OD适宜使用剂量为39.0~58.5 g a.i./hm^(2),在玉米3~6叶期兑水600 L/hm^(2)茎叶喷雾,对玉米生长安全,并有较好的增产效果。展开更多
A series of novel daphneolone analogs was designed and synthesized on the basis of natural product 1,5-diphenyl-2-penten-1-one（I） from Stellera chamaejasme L. as lead compound, whereby 2,6-dimethylmorpholine moiety ...A series of novel daphneolone analogs was designed and synthesized on the basis of natural product 1,5-diphenyl-2-penten-1-one（I） from Stellera chamaejasme L. as lead compound, whereby 2,6-dimethylmorpholine moiety was introduced to replace 1-phenyl group. Their structures were confirmed by IR,1H NMR, and HRMS（ESI） or elemental analysis,13 C NMR for some representative compounds. The two isomers of target compounds were separated and identified by NOESY technique and chemical method.All of the synthesized compounds have been evaluated for anti-plant pathogenic fungi activities. The results showed that some compounds exhibited moderate to good antifungal activities against tested fungi at the concentration of 50 mg/L. Among them, compound 7d, with a 4-bromine-substituted phenyl group and cis-2,6-dimethylmorpholine moiety, displayed best activity with an EC50 of 23.87 mmol/L against Valsa mali, superior to lead compound I. In addition, preliminary structure–activity relationship analysis indicated that, between two isomers of target compounds, the antifungal activities of the isomer with cis-2,6-dimethylmorpholine were better than the trans-isomer.展开更多
文摘为了找到更为安全高效环保的玉米苗后除草剂替代产品,2024年在安徽省巢湖市开展了验证2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂对玉米田杂草的药效、杀草谱及对玉米的安全性等田间试验。结果表明,2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂可防除一年生禾本科杂草及绝大部分阔叶杂草。施用剂量为39~58.5 g a.i./hm^(2),在玉米3~6叶期兑水600 L/hm^(2)茎叶喷雾,药后30 d,其对各种杂草的株防效为87.0%~98.1%,鲜重防效达90.7%~99.6%,且对玉米生长安全,并有较好的增产效果。
文摘近年来,玉米田杂草对烟嘧磺隆、莠去津已经产生了较高水平的抗药性,为找到更为安全高效环保的玉米苗后除草剂替代产品,2024年在安徽省巢湖市开展田间小区试验,以验证2.6%苯唑草酮·噻酮磺隆可分散油悬浮剂(OD)对玉米田杂草的药效、杀草谱及对玉米的安全性。结果表明,2.6%苯唑草酮·噻酮磺隆OD的杀草谱较广,可防除一年生禾本科杂草(马唐、稗)及绝大部分阔叶杂草(反枝苋、苘麻、空心莲子草和铁苋菜)。施药后30 d,2.6%苯唑草酮·噻酮磺隆OD处理对各种杂草的综合株防效为87.3%~98.2%,综合鲜重防效达90.7%~99.6%。2.6%苯唑草酮·噻酮磺隆OD适宜使用剂量为39.0~58.5 g a.i./hm^(2),在玉米3~6叶期兑水600 L/hm^(2)茎叶喷雾,对玉米生长安全,并有较好的增产效果。
基金supported by the National Natural Science Foundation of China (No. 21272266)the National High Technology Research and Development Program of China (No. 2011AA10A202)
文摘A series of novel daphneolone analogs was designed and synthesized on the basis of natural product 1,5-diphenyl-2-penten-1-one（I） from Stellera chamaejasme L. as lead compound, whereby 2,6-dimethylmorpholine moiety was introduced to replace 1-phenyl group. Their structures were confirmed by IR,1H NMR, and HRMS（ESI） or elemental analysis,13 C NMR for some representative compounds. The two isomers of target compounds were separated and identified by NOESY technique and chemical method.All of the synthesized compounds have been evaluated for anti-plant pathogenic fungi activities. The results showed that some compounds exhibited moderate to good antifungal activities against tested fungi at the concentration of 50 mg/L. Among them, compound 7d, with a 4-bromine-substituted phenyl group and cis-2,6-dimethylmorpholine moiety, displayed best activity with an EC50 of 23.87 mmol/L against Valsa mali, superior to lead compound I. In addition, preliminary structure–activity relationship analysis indicated that, between two isomers of target compounds, the antifungal activities of the isomer with cis-2,6-dimethylmorpholine were better than the trans-isomer.
