2-Thio, 2-sulfinyl and 2-sulfonyl pyridine N-oxides of the formula ##STR1## ARE USEFUL FOR REGULATING THE NATURAL GROWTH OR DEVELOPMENT OF PLANTS. E.g., the compound wherein n = 1, R.sub.1 = methyl and R.sub.2 = 2,3,4-trimethylphenyl retards cotton and increases root growth of turf.
公式为 ##
STR1## 的2-
硫代、2-
亚砜基和2-磺酰基
吡啶N-
氧化物可用于调节植物的自然生长或发育。例如,当n = 1,R.sub.1 =
甲基和R.sub.2 = 2,3,4-三
甲基苯基时,该化合物可延缓棉花生长并增加草地的根系生长。