一种热电装置可以杀死植物的根部，这为园丁们提供了一种新的解决方案，可以在不使用有害除草剂的情况下对付入侵的日本虎杖。
由英国一家初创企业发明的RootWave机器有望有效地将入侵杂草的根部煮沸，它的电动工具可以直接向工厂输送5千伏的电力。
伦敦交通局、英国文化遗产和阿森纳足球俱乐部等机构已经试用了该系统。
日本紫菀机构现在将向房主提供这种疗法。该机构承诺，这种疗法比化学疗法更有效，在第一次拜访时，大部分紫菀都得到了控制。
一个5-10年的治疗计划将花费约3000英镑，包括操作人员和机器。
日本虎杖是英国最顽固的入侵物种之一，影响着大约150万处房产。这种杂草会使本地物种窒息，还会对建筑物、墙壁和排水系统造成破坏。
房主在出售房产前必须声明病毒的存在，如果任由病毒扩散，他们可能会面临起诉。它被列为受管制废物，只能在有许可证的垃圾填埋场处理。
英国皇家园艺学会(Royal Horticultural Society)首席园艺学家盖伊·巴特(Guy Barter)说:“日本虎枝的根深且广，因此格外难杀。”
在人们担心草甘膦等除草剂对环境的影响之际，热电处理提供了一种潜在的无化学替代品。
绿色组织表示，使用草甘膦会损害生物多样性，特别是如果喷洒到周围的昆虫或植物。
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德国康斯坦茨大学(University of Konstanz)的研究人员去年进行的一项研究表明，它的广泛使用可能会损害野生蜂群。
英国将在2025年重新审查草甘膦的使用，但数十个议会和组织已经禁止在自己的土地上使用草甘膦。英国皇家园艺协会是已将除草剂下架的园艺商店之一。
据伦敦交通局的项目经理克雷格·沃德(Craig Ward)说，他们已经购买了两台Rootwave机器，发现它们“非常有效”，只需3名员工就可以取代12人的工作。
但巴特先生表示，尽管热电治疗的理论是合理的，但其疗效仍未得到证实。
他说，如果它能兑现承诺，这将是“在避免使用除草剂方面非常有用的进步”。
“如果这是一颗银弹，那就太好了，但我还没有看到任何证据，”他说。
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巴特先生说，应该建议园丁不要自己用除草剂处理日本虎杖。他说:“使用除草剂可以消灭它，但不幸的是，两年后它又冒出来了。”
阿兰·霍伊是日本紫菀中介公司的总经理，他说，自去年12月推出这项服务以来，公司已经收到了许多房主和学校的咨询。
他说:“任何减少英国化学品使用量的措施都是朝着正确的方向迈出的一步。”
在不使用化学物质的情况下，也曾有过其他解决这一问题的尝试。2012年奥运会的组织者花费了大约7000万英镑，花了四年时间来解决在伦敦东部发现的大规模入侵问题。
除了使用更传统的除草剂，开发商还在现场挖了一条宽阔的沟渠，将大部分日本虎杖埋在那里。
