Noxious weeds are those for which control measures, to some extent, are required by law. Across the United States, more than 500 weeds have been designated as noxious by either weed or seed laws. In Missouri, 11 weeds carry that designation: Canada thistle, field bindweed, johnsongrass, kudzu, multiflora rose, purple loosestrife, common and cutleaf teasel, musk thistle, Scotch thistle and marijuana. Noxious Weeds of Missouri provides descriptions and one or more photographs of each weed to aid in their identification. Included is a brief discussion of biological control of musk thistle by its natural enemies. See full infoormation in downloadable PDF format at http://extension.missouri.edu/explorepdf/agguides/pests/ipm1014.pdf
for more information on weeds of Missouri visit: http://weedid.missouri.edu/
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