Control and Elimination of Noxious Weeds

All of South Dakota\u27s noxious weeds are perennials. They spread by underground parts and by seeds. Field bindweed (creeping jenny) infests 1¼ million acres on 26,000 farms; Canada thistle, 230,000 acres on 22,000 farms; perennial sowthistle, 225,000 acres on 11,750 farms; leafy spurge, 58,000 acres on 5,500 farms; hoary cress, 1,470 acres on 280 farms; Russian knapweed, 620 acres on 205 farms; horse nettle, 150 acres on 84 farms; and quackgrass, 163,000 acres on 13,000 farms