After the plant bolts, spotted knapweed resembles a thistle. Spotted knapweed is not a serious concern in cropland because it is controlled by herbicides. In pastures, spotted knapweed is a ...
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Don't Be Fooled By These Pretty Purple Flowers By Learning To Identify Invasive WeedsPurple deadnettle, bull thistle, purple loosestrife, ground ivy, burdock, spotted knapweed, and lespedeza are some such examples. While it's tempting to retain surprise ornamental visitors in your ...
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