3种莠去津复配剂对玉米田杂草的防除效果

为降低莠去津对后茬作物的危害及环境的污染，选用3种莠去津复配制剂（20％烟嘧·莠去津可分散油悬浮剂、25％硝磺草酮·莠去津悬浮剂、50％硝磺草酮·莠去津·乙草胺悬乳剂）进行玉米田杂草防除效果研究，为田间合理选用除草剂提供依据。结果显示，3种复配剂对玉米地田间杂草群体防效均较好，药后45 d杂草群体株防效在84．00％以上、鲜质量防效在97．00％以上，25％硝磺草酮·莠去津悬浮剂对狗尾草防效较差，说明各复配剂能有效防除玉米地田间杂草且对玉米生长安全。

Efficacy of Three Atrazine-Containing Formulations against Weeds in Corn

To reduce the hazards of atrazine to the succeeding crop and environment pollution and to provide a basis for ra-tional use of herbicides,the efficacy of three atrazines mixtures 20%nicosulfuron· atrazine dispensed oil suspension con-centrate,25% mesotrione · atrazine suspension concentrate and 50% mesotrione · atrazine · acetochlor on weeds was comparatively evaluated in a corn field.Efficacy of those three atrazine mixtures on weeds in corn field was excellent, strain and fresh weight control efficiency on weed population was above 84%and 97%,respectively,45 days after applica-tion.The effect of mesotrione· atrazine 25%SC on Setaria viridis （ L.） Beauv was rather poor.It indicated that atrazi-na-containing products can effectively control weeds in corn fields without crop injury.