PYRAZOLE DERIVATIVES OR SALTS THEREOF, HERBICIDE CONTAINING SAID DERIVATIVES, AND AROMATIC CARBOXYLIC ACID DERIVATIVES OR SALTS THEREOF Russian patent published in 1999 - IPC

FIELD: agriculture. SUBSTANCE: pyrazole derivatives of formula I wherein is hydrogen or R¹ alkyl; C_1-4 is R² alkyl; C_1-4 are hydrogen, halogen or X¹ and X⁴ alkyl; each or C_1-4 and X² is X³ alkyl; Q is hydrogen or group of formula A-B; A is C_1-4, -CO- or -SO₂-; B is -CH₂CO-, alkyl, C_1-8 cycloalkyl or group of formula (a); Y is halogen, nitro, alkyl or alkoxy; m is 0, 1 or 2, n is 0 or 2, or salts thereof have high herbicidal activity and show phytoxicity to maize and puddy rice. EFFECT: improved properties of the title compounds. 12 cl, 33 ex, 13 tbl C_3-8