Species:  Diffuse knapweed (Centaurea diffusa) )  

Growth Form: Biennial or short-lived perennial.

Key Identifying Characteristics: The floral bracts have yellow spines with teeth appearing as a comb along the spine margins. Flowers are usually white, but may be rose-purple to lavender in appearance. Seedlings have finely divided leaves that are covered with short hairs.

Reproduction: seed

Seed Longevity: May remain dormant for several years

Native To: Eurasia

Effective Control Methods: Eliminate seed production through use of mechanical control followed by a fall herbicide application. Stress the plants' nutrient reserves as well as the soil seed bank through persistent management. Re-seed infested area with desirable species and manage them to produce a vigorous stand of plants.

---

Return to Main Page | Return to Weed Management Page