Recent research also suggests that weeds might get harder to kill with glyphosate, the most widely used plant killer in the United States.

最近的研究表示：美国境内广泛使用的除草剂草甘膦将不会再那么管用了。

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Hundreds of trees are being cut down on a Devon estate to prevent the spread of a killer plant pathogen with no cure, site managers have said.

BBC: Tree felling