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forest edges, and along streambanks. It thrives in open, disturbed, rich, bottom ground, particularly in cultivated fields.Johnson grass that is resistant to the common herbicide glyphosate has been found in Argentina and the United States. It is considered to be one of the ten worst weeds in the world. In the United States, Johnson grass is listed as either a noxious or quarantined weed in 19 states.

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