Submitted to: Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: September 19, 2005
Publication Date: December 5, 2005
Citation: Reddy, K.N., Bryson, C.T. 2005. Why ragweed parthenium is not a pernicious weed in the continental usa?. Proceedings Second International Conference on Parthenium Management, 2005. Technical Abstract: Ragweed parthenium has achieved major weed status in India and Australia within the past few decades. In the continental USA (48 contiguous states), ragweed parthenium is not a major weed despite close proximity to its native range. We provide rationale for why ragweed parthenium is not a major weed in the USA. Unfavorable temperate climatic conditions, extensive use of herbicides, tillage and cultivation practices, and competition from other aggressive weeds may have restricted recruitment and survival of ragweed parthenium in the USA. Several weed surveys provide evidence that ragweed parthenium is not a major weed in USA at the present time.