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