| 41. | By effecting more neighboring plants, the favorable changes in soil condition contribute to the success of diffuse knapweed.
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| 42. | One factor leading to the superior resource competition of diffuse knapweed is its ability to exist in drought conditions.
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| 43. | This advantage allows diffuse knapweed to devote its resources to competition while its neighbors are conserving resources to survive.
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| 44. | It is now established in knapweed populations throughout the western United States, especially in warm, dry areas.
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| 45. | Soldier Beetle " Trichodes alvearius " taking off from a Knapweed flower, showing its bright warning coloration
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| 46. | The neutral grassland areas support crested dog's-tail, common knapweed, red fescue, ribwort.
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| 47. | Selective pressure, given sufficient time, can cause the adaptation or evolution of invasive species such as diffuse knapweed.
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| 48. | Besides the advantages that diffuse knapweed gains from the ERH and allelopathy, it also possesses several characteristically invasive traits.
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| 49. | Because cattle prefer the native bunchgrass over knapweed, overgrazing occurs, increasing the density and range of knapweed infestations.
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| 50. | Because cattle prefer the native bunchgrass over knapweed, overgrazing occurs, increasing the density and range of knapweed infestations.
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