Response of sugarbeet, common sunflower, and common cocklebur to clopyralid or desmidipham plus phenmedipham

R. Wilson
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引用次数: 7

Abstract

A three-year experiment was conducted near Scottsbluff, NE, to evaluate the selectivity of clopyralid, desmedipham plus phenmedipham, and the combination for common sunflower and common cocklebur control in sugarbeet. Clopyralid provided 81 to 98% control of common sunflower and 95 to 98% control of common cocklebur while desmedipham plus phenmedipham provided poor control of both weeds. Combinations of clopyralid plus desmedipham plus phenmedipham provided good control of both weeds but in some years the treatment increased sugarbeet injury over that observed when clopyralid was applied alone. Common sunflower and common cocklebur at densities of 5 plants/9 m of crop row reduced sugarbeet root yield 31 and 28%, respectively. Clopyralid's efficacy on common sunflower and common cocklebur was reflected in sugarbeet root yields similar to those observed in a handweeded control.
甜菜、普通向日葵和普通鸦耳对氯吡啉或地米地芬加苯咪那芬的反应
在美国东北部Scottsbluff附近进行了一项为期三年的试验,以评估氯吡啉、地麦地那芬加苯麦地那芬以及联合用药对甜菜普通向日葵和普通鸡翅的选择性。氯吡唑啉对普通向日葵的防治效果为81% ~ 98%,对普通黄花的防治效果为95% ~ 98%,而地麦地那芬加苯麦地那芬对这两种杂草的防治效果都很差。氯吡柳酮加地甲苯胺加苯甲苯胺的组合对这两种杂草都有很好的控制作用,但在某些年份,与单独使用氯吡柳酮相比,该处理增加了甜菜损伤。在5株/9 m作物行密度下,普通向日葵和普通苍耳分别使甜菜根产量降低31%和28%。氯吡柳酮对普通向日葵和普通鸦耳草的功效反映在甜菜根产量上,与在手工除草对照中观察到的产量相似。
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