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iowariver

Killing a Black Walnut Tree with Roundup? Area contamination?

iowariver
5 years ago
last modified: 5 years ago

We have a place where two tall, but thin, Black Walnuts grew up in a grape arbor. They're definitely hurting the grapes. We'd like to girdle them and then immediately apply Roundup to the cuts to insure the whole tree, root and all die. We don't want to cut it down right now because that would hurt the grapevines during the growing season. Its an old vine and we'd rather prune it in the winter. I'd also like to use the trees once dead, which are 6-5 inches diameter and at least 25 feet tall, as intact poles to attach a wire shortwave antenna that would run from the house, even though the dead trees might only last 3-5 years for that purpose.

  • So my question is: would the Roundup going into the tree roots potentially hurt the roots of the grapevine which are no doubt entangled. Or would the Roundup essentially stay within the roots of the trees without hurting the grapevine roots? I know that Roundup usually breaks down fast. Advice please. Thanks.

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