Submitted to: Weed Ecology and Management
Publication Type: Book / Chapter
Publication Acceptance Date: November 30, 2002
Publication Date: June 1, 2003
Citation: Ziska, L.H. 2003. Rising Carbon Dioxide & Implications for Weed-Crop Management. New, T.W., Bear, D.S., Peny, S., Dawe, D. & Hady, B. Rice Science: Innovations and Impact for Livelihood. Manila, Philippines: IRRI Press. p. 615-634. Technical Abstract: The ongoing increase in atmospheric carbon dioxide (CO2), and associated changes in temperature and precipitation will almost certainly alter the growth, reproduction, and location of weedy species, with subsequent effects on weed/crop competition. In the review of data presented here, I examine the role of CO2 in stimulating photosynthesis and growth, as well as the subsequent consequences on weed biology and chemical weed management. Initial results suggest unfavorable consequences in agronomic systems, including irrigated rice. While incomplete, it is clear that the existing data suggest that the environmental and economic costs associated with the ongoing increase in CO2 and weed-crop competition may be substantial. To that end, it is hoped that this review will serve as an initial guide for interested parties in assessing the importance of past and current increases in atmospheric CO2 in relation to weed biology. It will also serve to elucidate areas where information is lacking.