DERIVATIVES OF 3-HYDROXY-4-ARYL-5-OXOPYRAZOLINE ELICITING HERBICIDE EFFECT, COMPOSITION AND METHOD FOR CONTROL OF WEED PLANTS Russian patent published in 2004 - IPC

FIELD: organic chemistry, herbicides, agriculture. SUBSTANCE: invention describes derivatives of 3-hydroxy-4-aryl-5-oxopyrazoline of the formula (I): wherein R₁,R₂,R₃ each means independently of one another halogen atom, C₁-C₄-alkyl, C₂-C₄-alkenyl, C₂-C₄-alkynyl, C₁-C₆-alkoxy-group; R₄ and R₅ form in common the group wherein each among R₁₄,R₁₅,R₁₆,R₁₇,R₁₈,R₁₉,R₂₀,R₂₁ forms independently of one another hydrogen atom or C₁-C₄-alkyl or wherein alkylene ring is bound by bridge by place of ring atom of group Z₂; G means hydrogen atom, ; X₁,X₂,X₃ each independently of one another means oxygen atom; R₃₀ and R₃₁ each independently of one another means C₁-C₅-alkyl, and also salts and diastereoisomers of compound of the formula (I) and herbicide composition containing compound of the formula (I), method for control of weed plants. Invention describes also herbicide composition with selective effect comprising mixture of effective amount of compound of the formula (I) with herbicide activity and effective amount compound of the formula (X): , or compound of the formula (XI) , or compound of the formula (XII) , or compound of the formula (XVIII) that are antagonists of herbicides. Invention represents also method for selective control of weed plants that involves treatment of agriculture crops with effective amount of compound of the formula (I) with herbicide effect and effective amount of protective agent of formulas (X), (XI), (XII) or (XVIII) as antagonists for herbicides. EFFECT: enhanced effectiveness of herbicides, improved control method, valuable agricultural properties of compounds. 15 cl, 27 tbl