Praxelis is an annual to short-lived perennial herb in the Asteraceae family and an emerging problematic weed species in Florida nurseries. The objective of these experiments was to determine efficacy of selected PRE and POST herbicides for control of praxelis. An additional experiment was conducted to determine efficacy of the same PRE herbicides for control of bluemink, a weed similar in appearance to praxelis that is also common in Florida. The granular herbicides dimethenamid + pendimethalin, flumioxazin, oxyfluorfen + pendimethalin, oxyfluorfen + prodiamine, and trifluralin + isoxaben were evaluated, along with spray-applied formulations of dimethenamid, indaziflam, and prodiamine + isoxaben. Flumioxazin consistently provided over 90% control of praxelis at both sites. Indaziflam control was inconsistent between the two sites, providing 100% control in Apopka but only a 22% reduction in weed counts in Balm. Oxyfluorfen + pendimethalin, oxyfluorfen + prodiamine, and prodiamine + isoxaben also provided control (57% to 97% reduction in shoot weight), albeit generally to a lesser degree than was observed with flumioxazin. All PRE herbicides provided similar control of both praxelis and bluemink, with the exception of dimethenamid and dimethenamid + pendimethalin, which reduced bluemink shoot weight more than praxelis. Clopyralid, glyphosate, and triclopyr all provided effective POST control of mature and flowering praxelis through 12 wk after treatment (WAT) and resulted in greater praxelis control than glufosinate. Results suggest that many commonly used PRE and POST herbicides would provide control of praxelis, but use of PRE and POST herbicides as well as sequential applications may be needed for long-term management.

中文翻译：

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Praxelis clematidea 的前后控制，这是佛罗里达苗圃生产中的一种新兴杂草

Praxelis 是菊科一年生或短命的多年生草本植物，也是佛罗里达苗圃中新兴的有问题的杂草物种。这些实验的目的是确定选定的 PRE 和 POST 除草剂对控制长草属植物的功效。进行了一项额外的实验，以确定相同的 PRE 除草剂对蓝貂的控制效果，蓝貂是一种外观与佛罗里达州常见的长尾草相似的杂草。评估了颗粒状除草剂敌草胺 + 氟虫草胺、氟噻嗪、氧氟草醚 + 敌草胺、氧氟草醚 + 丙二胺和氟乐灵 + 异恶草胺，以及二甲噻吩草胺、吲达唑仑和丙二胺 + 异恶草胺的喷雾应用配方。Flumioxazin 在两个地点始终提供超过 90% 的 praxelis 控制。Indaziflam 控制在两个站点之间不一致，在 Apopka 中提供 100% 的控制，但在 Balm 中仅减少 22% 的杂草数量。氧氟草醚 + 戊二胺、氧氟草醚 + 丙二胺和丙二胺 + 异恶草胺也提供对照（枝条重量减少 57% 至 97%），尽管程度通常低于用氟米恶嗪观察到的程度。所有 PRE 除草剂都对长尾草和蓝貂提供了类似的控制，除了二甲噻吩和二甲噻吩+二甲戊灵，它们比长草更能降低蓝貂的枝条重量。氯吡菌胺、草甘膦和绿草定都在处理后 12 周 (WAT) 中对成熟和开花的长春花有效的 POST 控制，并导致比草铵膦更好的长春花控制。结果表明，许多常用的 PRE 和 POST 除草剂可以控制长草，