Ornamental jewelweed (Impatiens glandulifera Royle) is an alien invasive plant in Europe. This annual plant often grows in riparian habitats where herbicides are prohibited. Several studies have reported the negative effect on ecosystem and ecosystem services by this species. However, limited research is published on control measures and the aim of our study was to explore use of hot water and cutting to control I. glandulifera. A lab experiment showed that the lethal water temperature for seed was between 45 and 50 C. In a pot experiment with seeds in soil, emergence of I. glandulifera was reduced by 78% and 93% compared with the untreated control with volumes of hot water (80 C) of 7.2 and 14.5 L m−2, respectively. When treatments were conducted on relatively tall plants (almost 60 cm) in late June, hot water gave significantly better control than cutting. Compared with an untreated control, I. glandulifera cover was reduced by 97% and 79% after hot water and cutting, respectively. Application of hot water to smaller (<40 cm) and less developed plants (BBCH 12–13) in early June and cutting of plants with visible flower buds (mid-July) led to no significant difference in cover. Compared with an untreated control, I. glandulifera cover was reduced by 99% (cut below first node) and 91% (hot water and cut above first node). When relatively tall plants (almost 60 cm) were treated, hot water use was high (31.1 L m−2) and required twice as many work hours (4.8 min m−2) as cutting (2.4 min m−2). When smaller plants (<40 cm) were targeted, work hours and hot water use were reduced to 2.1 min m−2 and 13.7 L m−2, respectively.

中文翻译：

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控制凤仙花的热水和切割

观赏宝石草 (凤仙花Royle）是欧洲的一种外来入侵植物。这种一年生植物通常生长在禁止使用除草剂的河岸栖息地。几项研究报告了该物种对生态系统和生态系统服务的负面影响。然而，关于控制措施的研究有限，我们研究的目的是探索使用热水和切割来控制一、腺体. 实验室实验表明，种子的致命水温在 45 到 50 摄氏度之间。一、腺体与热水体积（80 摄氏度）为 7.2 和 14.5 L m 的未处理对照相比，减少了 78% 和 93%-2， 分别。在 6 月下旬对相对较高的植物（近 60 厘米）进行处理时，热水的控制效果明显优于切割。与未处理的对照相比，一、腺体热水和切割后覆盖率分别减少了 97% 和 79%。在 6 月初向较小（<40 cm）和发育不全的植物（BBCH 12-13）施用热水并切割具有可见花蕾的植物（7 月中旬）导致覆盖率没有显着差异。与未处理的对照相比，一、腺体覆盖减少了 99%（在第一个节点下方切割）和 91%（热水和在第一个节点上方切割）。当处理相对较高的植物（近 60 厘米）时，热水的使用量很高（31.1 L m-2) 并且需要两倍的工作时间（4.8 分钟 m-2) 作为切割 (2.4 min m-2）。当以较小的植物（<40 cm）为目标时，工作时间和热水使用时间减少到 2.1 min m-2和 13.7 L m-2， 分别。