31. The high number of seeds produced by diffuse knapweed is also a common trait of invasive plants. 32. Threats to the species include the noxious weed " Centaurea maculosa ", spotted knapweed . 33. It has many insects and flowers include purple knapweed , yellow birdsfoot-trefoil and red clover. 34. The concentration of diffuse knapweed in such an area is often linked to the level of soil disturbance. 35. It is host-specific to invasive knapweeds and has not been known to attack any native plants. 36. During this time the female lays up to 130 eggs, depositing them in the knapweed flower head. 37. The host plant for the larvae is usually a knapweed ( " Centaurea " sp ). 38. Knapweed peacock fly ( " Chaetorellia acrolophi " ) larvae eat spotted knapweed and some other species.39. Knapweed peacock fly ( " Chaetorellia acrolophi " ) larvae eat spotted knapweed and some other species. 40. Land that has been recently disturbed by human or natural processes is favored for the establishment of diffuse knapweed .
