The spray will kill the noxious weeds and reduce their spread.Although most blackberry bushes are not yet producing ripe fruit, people are warned not to pick and eat blackberries on public land for their own safety.Most of the treated plants will begin to die within a few weeks and fruit will not continue to ripen on bushes that have been sprayed.Blackberries are a fast-spreading and highly invasive exotic weed that provide habitat for feral species such as foxes, rabbits, and cats.
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