Herbizid

摘要

1298481 Herbicidal compositions BADISCHE ANILIN- & SODA-FABRIK AG 22 April 1970 [23 April 1969] 19240/70 Heading A5E [Also in Division C2] A herbicidal composition comprises a mixture of a compound of formula III in which X is thiocyano, halogen, nitro, trifluoromethyl, an alkyl radical having 1 to 3 carbon atoms or an alkoxy radical, R is an aliphatic hydrocarbon radical having 1 to 3 carbon atoms which may be substituted by chlorine, bromine, cyano or thiocyano, R' is an alkynyl radical having 2 to 5 carbon atoms and n denotes 0, 1, 2 or 3 and a compound of formula I in which X is chlorine, bromine, methyl mercapto or methoxy, R is C 1 -C 4 alkyl, isobutynyl, methoxyisopropyl, ethoxyisopropyl, γ-methoxypropyl, propoxyisopropyl or the group II or salts thereof, and R1 is ethyl, isopropyl, tert-butyl, γ-methoxypropyl, #-methoxyethyl, methoxyisopropyl, ethoxyisopropyl, propoxyisopropyl, methylmercaptoisopropyl, isopentynyl, α,α-bis-(ethyl)- ethyl-α-cyanoisopropyl, cyanomethyl, #-cyanoethyl, α,α-bis-(methyl)- propyl, isobutynyl, #-methylmercapto-ethyl or cyanopropyl, or a compound of formula IV in which X is oxygen or sulphur, R is a C 1 -C 8 aliphatic hydrocarbon radical which may be substituted by chlorine, bromine, methoxy or ethoxy groups, R1 is hydrogen or haloalkyl and R2 is haloalkyl. The herbicide is useful for controlling unwanted plants both pre- and post-emergence, specially pre-emergence in crops such as potatoes, Indian corn, rice &c. Methods of preparing compounds I and III are described.