摘要
为测定环磺酮对玉米田一年生杂草的除草效果,确定其使用剂量及加入安全剂对其除草效果的影响,同时测定环磺酮与烟嘧·莠去津混用的药效及安全性。选择5%环磺酮可分散油悬浮剂进行田间试验,并与玉米田常用除草剂15%硝磺草酮可分散油悬浮剂、30%苯唑草酮悬浮剂、24%烟·硝·莠去津可分散油悬浮剂的防效作对比。结果表明,试验各处理对玉米无明显影响,从总草防效对比可以看出,硝磺草酮150 g a.i/hm^(2)处理与环磺酮105 g a.i/hm^(2)处理差异不显著,与环磺酮120 g a.i/hm^(2)处理差异显著,说明环磺酮活性比硝磺草酮高;苯唑草酮+助剂处理的防效与环磺酮105 g a.i/hm^(2)处理差异不显著。加安全剂的处理与同剂量无安全剂的处理防效无显著性差异,说明安全剂的加入对环磺酮除草活性无影响;环磺酮+烟嘧·莠去津90+450 g a.i./hm^(2)进行处理,结果显示其防效与环磺酮单用处理差异显著,且比烟·硝·莠去津720 g a.i./hm^(2)处理的防效高,但差异不显著。建议可以根据田间杂草发生情况进行环磺酮105~120 g a.i./hm^(2)与环磺酮+烟嘧·莠去津90+450 g a.i./hm^(2)交替使用,既可以保证防效,也可以延缓药剂的抗性。
The efficacy of tembotrione alone and in mixture with a formulation mixture of nicosulfuron·andatrazine on annual weeds and its selectivity in a corn field in relation to dose and use of safeners.Tembotrione 5%OD was compared with mesotrione 15%OD,topramezone 30%SC,nicosulfuron·mesotrione·atrazine 24%OD,which arecommonly used in corn fields.All treatments were selective to corn.Based on total weed control,mesotrione at 150 g a.i./hm^(2)and tembotrione at 105 g a.i./hm^(2)were similar.The activity of tembotrione at 120 g a.i./hm^(2)was significantly higher than that of mesotrione at 150 g a.i./hm^(2).Efficacy of mesotrioneplus adjuvant was not significantly different from tembotrione at 105 g a.i./hm^(2).At identical doses,adding a safenerdid not affect the efficacy of tembotrione. Efficacy of tembotrione was significantly improved when mixed with nicosulfuron plus atrazine(90+450 g a.i./hm^(2))and slightly higher when combined with nicosulfuron·mesotrione·atrazine(720 g a.i./hm^(2)).It is suggested that tembotrione 105~120 g a.i./hm^(2)and tembotrione+nicosulfuron·atrazine 90+450 g a.i./hm^(2)can be used alternately according to the occurrence of weeds in the field,which can not only provide adequate control but also help prevent the evolution of herbicide resistance.
作者
苏旺苍
郝红丹
孙兰兰
徐洪乐
吴仁海
张玉聚
薛飞
SU Wang-cang;HAO Hong-dan;SUN Lan-lan;XU Hong-le;WU Ren-hai;Zhang Yu-ju;XUE Fei(Institute of Plant Protection,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China)
出处
《杂草学报》
2020年第4期49-56,共8页
Journal of Weed Science
基金
国家重点研发计划(编号:2018YFD0200605)
国家自然科学基金(编号:31901901)。