(2 Lec, 1 3-hr Lab) Weed classification, identification, adaptations for weediness; principles of weed control; properties, uses, and action of herbicides. Lab: pesticide application equipment and techniques, no-till farming, greenhouse and field experiments. A-F only. Pre: CHEM 152 and TPSS 200/SUST 211, or consent. (Fall only) (Cross-listed as TPSS 481)