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Herbicide Loses Effectiveness at Higher CO2
The left photo shows weeds in a plot grown at a carbon dioxide (CO2) concentration of about 380 parts per million (ppm), which approximates the current level. The right photo shows a plot in which the CO2 level has been raised to about 680 ppm. Both plots were equally treated with herbicide.1
References
- 1. [233] Wolfe, D., L. Ziska, C. Petzoldt, A. Seaman, L. Chase, and K. Hayhoe. "Projected Change in Climate Thresholds in the Northeastern U.S.: Implications for Crops, Pests, Livestock, and Farmers." Mitigation and Adaptation Strategies for Global Change 13, no. 5-6 (2007): 555-575.
Summary
| High-resolution | High-resolution JPEG |
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| Photo Credit | Lewis Ziska - USDA ARS |
