| abstract |
The compounds of formula I or their salts wherein R¹ and R² are independently (C₁-C₄) alkyl; R³ halogen, especially Cl or Br R⁴ is hydrogen, Cl, Br or methyl, XO, S or N-R⁵ R⁵ is hydrogen, (C₂-C₆) alkenyl, (C₁-C₆) alkyl, where the alkyl group can be substituted up to two times by (C₁-C₆) alkoxy, (C₁-C₃) dialkylamino or up to six times by halogen , means have excellent plant growth regulating effects in important crops. |