Answer: You could try using an herbicide containing glyphosate at the concentration for brush. Use it very carefully and follow all of the label instructions including those for ambiant temperature or it may not work. This is a contact herbicide and will damage neighboring plants, so you may have to apply it using a wipe-on method rather than spray in some areas. You may also have to use it more than once to achieve control;sometimes a fall application when the plants are creating root stores is more effective than spring when the plant is pre-primed to grow. Good luck with the monster.
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