1. Heap, I., The occurrence of herbicide-resistant weeds worldwide. Pestic. Sci, 1997. 51: p. 235-245.

2. Gadamski, G., et al., Negative cross-resistance in triazine-resistant biotypes of Echinochloa crus-galli and Conyza canadensis. Weed Science, 2003. 48(2): p. 176-180.

3. http://www.publicaffairs.noaa.gov/releases2007/jan07/noaa07-r402.html.

4. http://www.noaanews.noaa.gov/stories2007/s2778.htm.

5. Rohr, J., et al., Multiple stressors and salamanders: Effects of an herbicide, food limitation, and hydroperiod. Ecological Applications, 2004. 14(4): p. 1028-1040.

6. Rohr, J. and B. Palmer, Aquatic herbicide exposure increases salamander desiccation risk eight months later in a terrestrial environment. Environ. Toxicol. Chem., 2005. 24(5): p. 1253-1258.

7. Fairchild, J., D. Ruessler, and A. Carlson, Comparative sensitivity of five species of macrophytes and six species of algae to atrazine, metribuzin, alachlor, and metolachlor. Environ. Toxicol. Chem., 1998. 17: p. 1830–1834.

3. Atrazine has detrimental ecological impacts on plants and wildlife