Stems/Leaves: The leaves are smaller at the top and bigger at the bottom. The leaves are divided into parts called toothed parts. Which means that the leaves are very thin and finely divided. The color of the leaves are a light green and they are covered with short hairs. The height of this knapweed is 1.5-2.5 ft. There is one single stem that comes up from the rosette, (a bunch of leaves bunched together at the bottom of the plant). (1,2)
2. Cultural: Grasses that will not be harmed by the herbicide can by re-seeded to compete against the knapweed.
Irrigation is another way to try to stabilize the knapweed and over take it.
Fires are also another way of control. You can burn them down. That does not mean it will kill them though.
Grazing is also another way. Do not over graze, though. (2)
4. Mechanical: If you want to pull or cut down the plant it is best to remove the rosette and part of the roots. There is only a 4% chance of it surviving. If you leave the rosette, there is a 38% chance of it surviving. You do the math!! (2)
Tilling: Plowing or tilling an infested area several times a year for several years to control the weed. <5. Other: Flooding or shading can also kill or destroy this knapweed. How to Prevent Spread: Some ways to stop spread are to stay out of it. Wash off your vehicle before driving off with the seeds stuck in your tires, or in the vehicle. Do not move soil infested with seeds. Basically use precautions when and if you are near or in it.