10种助剂对玉米田除草剂烟·硝·莠的增效作用及其安全性研究

Synergic Effect on Nicosulfuron·Mesotrione·Atrazine and Safety to Corn of Ten Adjuvants

为筛选出玉米田除草剂烟·硝·莠减量增效的最佳助剂,选择10种不同类型助剂进行田间试验,比较添加不同助剂对烟·硝·莠除草活性的影响。结果表明,供试助剂对烟·硝·莠均表现出一定的增效作用,且对玉米无明显不良影响。施药后14d,24.2%烟·硝·莠可分散油悬浮剂544.5g/hm^2中添加助剂GY-S903、GY-W07处理对杂草的防效级别总体上比添加其他助剂的处理高,说明GY-S903和GY-W07对烟·硝·莠的增效作用比较明显;24.2%烟·硝·莠可分散油悬浮剂544.5g/hm^2中添加助剂伴宝、GY-S903、GY-W07、多功能除草剂增效剂、有机硅、锐超麦助剂处理的总株防效分别为76.8%、79.9%、80.6%、78.9%、77.9%、78.3%,与24.2%烟·硝·莠可分散油悬浮剂762.3g/hm^2处理差异不显著,其中,助剂GY-W07的增效作用最明显。施药后28d,24.2%烟·硝·莠可分散油悬浮剂544.5g/hm^2中添加助剂GY-S903、GY-W07处理的总株防效分别为92.8%、94.2%,显著高于24.2%烟·硝·莠可分散油悬浮剂544.5g/hm^2处理,与24.2%烟·硝·莠可分散油悬浮剂762.3g/hm^2处理差异不显著;添加助剂GY-W07处理的总鲜质量防效为93.7%,与24.2%烟·硝·莠可分散油悬浮剂762.3g/hm^2处理差异不显著。综合比较,供试助剂GY-S903、GY-W07对烟·硝·莠的减量增效作用较明显,多功能除草剂增效剂的增效作用次之。

In order to screen the best adjuvants which have enhanced effect on the herbicide nicosulfuron·mesotrione·atrazine in corn field,a field trial was carried out to compare the enhanced effect of ten adjuvants on nicosulfuron·mesotrione·atrazine.The results showed that the tested adjuvants enhanced the activity of nicosulfuron·mesotrione·atrazine differently,and had no adverse influence on corn.At 14 days after application of herbicide,the control levels on weeds of the treatments with GY-S903 or GY-W07 added into 544.5 g/ha nicosulfuron·mesotrione·atrazine were generally higher than the treatments with other adjuvants added,indicating that GY-S903 and GY-W07 could enhance the effect of nicosulfuron·mesotrione·atrazine obviously.Total control effects on plant number of weeds of the treatments with Biopower,GY-S903,GY-W07,multifunctional herbicide synergist,organic silicon,and Quelex's adjuvants added into 544.5 g/ha nicosulfuron·mesotrione·atrazine were 76.8%,79.9%, 80.6%,78.9%, 77.9%,and 78.3%,respectively,showing no significant difference from the treatment of 762.3 g/ha nicosulfuron·mesotrione·atrazine.Among the adjuvants,the enhanced effect of GY-W07 on nicosulfuron·mesotrione·atrazine was the best.At 28 days after application of herbicide,total control effects on plant number of weeds of the treatments with GY-S903 and GY-W07 added into 544.5 g/ha nicosulfuron·mesotrione·atrazine were 92.8% and 94.2% respectively,which were significantly higher than the treatment of 544.5 g/ha nicosulfuron·mesotrione·atrazine,but not significantly different from the treatment of 762.3 g/ha nicosulfuron·mesotrione·atrazine.Fresh weight control effect of the treatment with GY-W07 added into 544.5 g/ha nicosulfuron·mesotrione·atrazine was 93.7%,which was not significantly different from the treatment of 762.3 g/ha nicosulfuron·mesotrione·atrazine.In a comprehensive comparison,adjuvants GY-S903 and GY-W07 have best enhanced effect on the herbicide nicosulfuron·mesotrione·atrazine,followed by multifunctional herbicide synergist.