氟咯草酮及其混剂对棉田杂草防除效果及安全性

Weed Control Efficacy and Crop Safety of Fluorochloridone and Its Mixtures in Cotton Fields

为明确氟咯草酮分别与二甲戊灵、乙草胺混用在棉田的除草效果及安全性,采用土壤喷雾法测定比较了各单剂及相应混剂对杂草的田间防效,并对棉花的安全性进行评价。结果表明,氟咯草酮分别与二甲戊灵、乙草胺混用时对反枝苋、铁苋菜、醴肠、马齿苋、牛筋草均具有较好的防效。根据室内及田间试验观察,并综合防效、成本等因素,在实际生产应用中,推荐以下2种药剂混用组合在棉花田播后苗前进行推广应用:氟咯草酮450.0 g a.i./hm^2+二甲戊灵495.0 g a.i./hm^2;氟咯草酮450.0 g a.i./hm^2+乙草胺750.0 g a.i./hm^2。

To determine and compare their weed control effect and safety to cotton in field condition,fluorochloridone, pendimethalin, acetochlor and their corresponding mixtures were sprayed after sowing beforeseedling emergence using soil treatment method. The field research showed that the mixtures offluorochloridone with pendimethalin or acetochlor could effectively control Amaranthus retroflexus, Eleusine indica, Acalypha australis, Eclipta prostrate and Portulaca oleracea. According to the results of greenhouse andfield experiments, we recommend the following two combinations for weed control in cotton field：fluorochloridone 450.0 g a.i./hm2＋pendimethalin 495.0 g a.i./hm2, fluorochloridone 450.0 g a.i./hm2＋ acetochlor750.0 g a.i./hm2.