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首页> 外文期刊>Sociedade Brasileira da Ciencia das Plantas Daninhas >Control of South African lovegrass (Eragrostis plana) in natural pastures using pre emergent herbicides and different vegetation management methods
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Control of South African lovegrass (Eragrostis plana) in natural pastures using pre emergent herbicides and different vegetation management methods

机译：使用预先除草剂和不同的植被管理方法控制天然草场中的南非爱情草（Eragrostis Plana）

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The weed South African lovegrass (Eragrostis plana) is one of the most important problems of rangelands and native pastures in southern Brazil. Several factors have limited its management in these areas. The aim of this study was to evaluate South African lovegrass control using pre-emergent herbicides safe to the native pasture by applying soil position selectivity. Two experiments were evaluated in this study. The first was conducted in a greenhouse, and South African lovegrass seeds were sown in plastic pots. The herbicides evaluated were alachlor, ametryne, ametryne + tebuthiuron, atrazine, clomazone, diuron, flumioxazin, imazaquin, mesotrione, metribuzin, oxadiazon, S-metolachlor, sulfentrazone, terbuthylazine and trifluralin. All products successfully controlled lovegrass. The second experiment was conducted on native pastures highly infested with South African lovegrass, arranged in a split-split-plot design. In the main plots, the following vegetation management methods were allocated before herbicide application: prescribed burning, and high and low cutting; in the split-plots, the herbicide doses: 75 and 100% of the label rate; and in the split-split-plots, the herbicide doses: atrazine, flumioxazin, mesotrione, S-metolachlor, sulfentrazone, trifluralin and the untreated-check control. None of the herbicides tested effectively controlled lovegrass under field conditions, likely due to the high density of South African lovegrass perennial plants. However, the herbicide effects were more pronounced when associated with prescribed burning and low cutting.
机译：南非南非杂草（Eragrostis plana）是巴西南部牧场和本地牧场最重要的问题之一。有几个因素限制了其在这些领域的管理。这项研究的目的是通过应用土壤位置选择性来评估对本地牧场安全的芽前除草剂对南非除草的控制。在这项研究中评估了两个实验。第一次是在温室中进行的，南非的lovegrass种子播种在塑料盆中。所评估的除草剂为甲草胺，a紫杉醇，a紫杉醇+丁草嘧啶，r去津，广灭灵，地隆，氟米嗪，伊马氮喹，甲基磺草酮，甲丁嗪，草二酮，S-甲草胺，次磺隆，丁丁嗪和三氟拉林。所有产品成功控制了lovegrass。第二个实验是在以南非裂草为生的高分草场上进行的，该草场采用分瓣式设计。在主要地块中，在施用除草剂之前，分配了以下植被管理方法：规定的燃烧，高低切割;在分块图中，除草剂的剂量为标记率的75％和100％;在分次分解图中，除草剂的剂量为：阿特拉津，氟米嗪，甲基磺草酮，异丙甲草胺，次磺隆，三氟拉林和未经处理的对照。测试的除草剂均未在田间条件下有效控制白茅草，这很可能是由于南非白茅草多年生植物的高密度造成的。但是，除草剂与规定的燃烧和低采伐量相关时，除草剂的作用更为明显。

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