The control of spotted knapweed is very necessary, generally the following methods can be used: Removal: spotted knapweed often grows in sandy soil, so it is relatively easy to remove by hand, pay attention to remove as many long roots as possible. Mowing before flowering: This can reduce seed yield. However, because these plants continue to bloom throughout the summer / early autumn, repeated pruning is required throughout the season to prevent the plants from re-sprouting and producing seeds. Wash the equipment thoroughly after cutting the grass to prevent the seeds from spreading to new places. Chemical control: spotted knapweed can be effectively removed by targeted herbicides. Note: Wear long sleeves and gloves when handling this plant, it may irritate some people's skin.