Efficacy of Sequential Applications of MSMA in Combination with Diuron for Weed Control in Young Oil Palm Circle

The Planter Pub Date : 2020-02-25 DOI:10.56333/tp.2020.002
K. Sim, S. H. ANTHONY TAN, Y. K. JASON YEOH, T. Chuah
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Abstract

Circle weeding within the area covered by oil palm canopy is one of the most important methods of weed management in young oil palm plantations. Application of herbicide mixture has been a common practice to control mixed weeds in oil palm and it also helps to delay herbicide resistance. This study aims to determine the efficacy of MSMA in combination with diuron for weed control in young oil palm circles under field conditions. Three sequential applications of the herbicide combinations with 45 days’ interval were carried out while weed control and appearance of oil palm spears were assessed throughout the 18 weeks’ of experimental period. The results showed that MSMA + diuron at a rate of 2 945 + 600 g per hectare provided 86 per cent weed control in young oil palm circles with healthy oil palm spears after three sequential applications although scorching was apparent at lower fronds due to drift of spray droplets. Increasing the rate of MSMA + diuron to 5 890 + 1 200 g per hectare gave comparable results and the treatment did not exhibit phytotoxic effect to spears of young oil palm after three sequential applications. These findings suggest that a combination of MSMA + diuron at a rate of 2 945 + 600 g per hectare could be applied to control weeds in young oil palm circle without causing phytotoxicity to the oil palm spears although scorching was observed at the lower fronds. Keywords: Diuron, herbicide mixture, spears, sequential.
MSMA联合Diuron序贯施用对油棕幼苗杂草的防治效果
油棕树冠覆盖区域内的环形除草是油棕幼林杂草管理的重要方法之一。混合施用除草剂是防治油棕混交杂草的常用方法,也有助于延缓其抗除草剂性。本研究旨在确定田间条件下MSMA与迪乌隆联合施用对油棕幼树杂草的防治效果。在18周的试验期内,连续施用3次,每隔45天施用1种除草剂组合,并对油棕幼苗的杂草控制和外观进行评价。结果表明,在连续施用三次MSMA + diuron的情况下,2 945 + 600 g /公顷的MSMA + diuron对健康油棕幼苗圈的杂草防治效果为86%,但由于喷雾液滴的流动,下部叶片明显烧焦。将MSMA + diuron的施用量增加到5 890 + 1 200 g /公顷,结果相当,连续施用三次后,该处理对油棕幼枝没有植物毒性作用。这些结果表明,MSMA + diuron以2 945 + 600 g /公顷的剂量联合施用可有效防治油棕幼苗圈杂草,而不会对油棕茎秆产生植物毒性,但在下部叶上观察到烧焦现象。关键词:Diuron,除草剂混合物,穗,序贯。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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