Limbongan Amelia A, Campbell Shane D, Galea Victor J
School of Agriculture and Food Sciences, The University of Queensland, Gatton Campus, Gatton, QLD 4343, Australia.
Plants (Basel). 2021 Nov 18;10(11):2505. doi: 10.3390/plants10112505.
Mimosa bush () is an invasive woody weed widely distributed in Australia. While it can be controlled using several mechanical and chemical techniques, this study evaluated a novel herbicide delivery mechanism that minimizes the risk of spray drift and potential non-target damage. This method, developed by Bioherbicides Australia, involves the implantation of encapsulated granular herbicides into the stem of intact plants or into the stump after cutting off plants close to ground level (cut stumps). Trials were implemented near Moree (New South Wales, Australia) on intact (two experimental runs) plants and cut stumped (two experimental runs) plants. For each trial, an untreated control plus the conventional basal bark application of a liquid formulation of triclopyr + picloram mixed with diesel was included for comparison. Encapsulated glyphosate, aminopyralid + metsulfuron-methyl, hexazinone and clopyralid were also tested in all trials. In addition, encapsulated triclopyr + picloram, and metsulfuron-methyl were included in one of the intact plant trials. Aminopyralid + metsulfuron-methyl was consistently most effective on cut stump and intact plants, whilst clopyralid provided highest mortality when applied to cut stumps and single-stemmed intact plants. Particularly for multi-stemmed intact plants, clopyralid should be applied to each stem. Overall, the highest efficacy was achieved on single stemmed plants, but with further refinement of the technique, it should be possible to achieve similar results for multi-stemmed individuals. This method resulted in a reduction in the use of herbicide and environmental contamination while significantly improving speed of treatment.
含羞草（）是一种在澳大利亚广泛分布的入侵性木本杂草。虽然可以使用多种机械和化学技术对其进行控制，但本研究评估了一种新型除草剂施用机制，该机制可将喷雾漂移风险和潜在的非靶标损害降至最低。这种由澳大利亚生物除草剂公司开发的方法，包括将封装好的颗粒状除草剂植入完整植株的茎干中，或在贴近地面切断植株（砍除树桩）后植入树桩中。试验在澳大利亚新南威尔士州莫里附近对完整植株（两次试验）和砍除树桩的植株（两次试验）进行。每次试验都设置了一个未处理的对照，并纳入了与柴油混合的三氯吡氧乙酸 + 毒莠定液体制剂的传统基部树皮施用方法作为对照。在所有试验中还测试了封装的草甘膦、氨氯吡啶酸 + 甲基磺草酮、嗪草酮和氯吡嘧磺隆。此外，在一次完整植株试验中还纳入了封装的三氯吡氧乙酸 + 毒莠定以及甲基磺草酮。氨氯吡啶酸 + 甲基磺草酮对砍除树桩的植株和完整植株始终最为有效，而氯吡嘧磺隆在施用于砍除树桩的植株和单茎完整植株时死亡率最高。特别是对于多茎完整植株，应将氯吡嘧磺隆施用于每根茎干。总体而言，单茎植株的除草效果最佳，但随着该技术的进一步完善，多茎植株也应能取得类似的效果。这种方法减少了除草剂的使用和环境污染，同时显著提高了处理速度。
