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1. Triazine or S-triazine Family sometimes called just triazines
Technically s (symmetrical) triazines are different
We won’t make a big deal out of it and we will include metribuzin and hexazinone
Three sub-families
Chloro (Cl), Methoxy (OH), and Thio (S)
Selectivity by metabolism, placement, and conjugation
Nearly 100,000,000 pounds used annually in U.S.
MOA is interference with PS II (Photo System II)
Plants emerge healthy and then die
2. Photosynthesis