Abstract: The invention relates to fungicidal compositions which comprise a carrier and, as active ingredient, a dihalotriazolopyrimidine derivative of general formula (I) in which R represents an optionally substituted branched or straight-chain alkyl or alkoxy group or an optionally substituted cycloalkyl, aryl, aryloxy, or heterocyclyl group, and Hal represents a fluroine, chlorine, bromine or iodine atom; and their use as fungicides. Certain of these dihalotriazolopyrimidine derivatives are novel and a process for the preparation of these compounds is also provided.

Abstract: The invention relates to fungicidal compositions which comprise a carrier and, as active ingredient, a dihalotriazolopyrimidine derivative of general formula (I) in which R represents an optionally substituted branched or straight-chain alkyl or alkoxy group or an optionally substituted cycloalkyl, aryl, aryloxy, or heterocyclyl group, and Hal represents a fluorine, chlorine, bromine or iodine atom; and their use as fungicides. Certain of these dihalotriazolopyrimidine derivatives are novel and a process for the preparation of these compounds is also provided.

Abstract: Compounds of the formula ##STR1## wherein R.sub.1 is fluorine, chlorine, bromine or iodine; and A is 2,6-difluorophenyl, 2-chlorophenyl, 2-chloro-6-fluorophenyl, 2,6-dichlorophenyl or 2-fluorophenyl,with the proviso that when R.sub.1 is chlorine, A is other than 2,6-dichlorophenyl, useful as pesticides.

Abstract: The invention provides fungicidal compositions containing benzyl-tris(aryl)-phosphonium salts of the general formula ##STR1## in which R.sup.1 represents an optionally substituted alkyl or alkoxy group; R.sup.2 represents a hydrogen atom or an optionally substituted alkyl group; R.sup.3, R.sup.4 and R.sup.5 independently represent a hydrogen or halogen atom or an optionally substituted alkyl or alkoxy group; and A.sup.- represents an anion processes for the preparation of such compounds. Certain of the compounds of formula I are novel and the invention therefore also provides processes for the preparation of such compounds and their use as fungicides.

Abstract: Compounds of the formula ##STR1## wherein A is ##STR2## B is ##STR3## R.sup.1 is hydrogen; halogen, cyano or optionally substituted C.sub.1-4 alkyl; andQ is NR.sup.8 R.sup.9 or ##STR4## where R.sup.2 to R.sup.11 are substituents of various types. The compounds are useful as fungicides.

Abstract: This invention relates to compounds of the formula ##STR1## Z' is chlorine or fluorine, with the proviso that Z' is chlorine when Q is the moiety of Formula III. The invention also relates to the preparation of the compounds, their use in controlling animal pests in plant protection, and pesticidal agents comprising the compounds as active ingredients.

Abstract: The present invention relates to new urea derivatives having pesticidal activity, particularly fungicidal activity. The urea derivatives, according to the invention, have the general formula ##STR1## wherein X, Y and Z represent hydrogen or halogen atoms and at least one of the substituents X, Y or Z is a halogen atom.

Abstract: This invention relates to compounds of the formula ##STR1## wherein ##STR2## X is oxygen or sulfur; Y is chlorine or fluorine; andZ is hydrogen, chlorine, or fluorine,as well as to the preparation thereof, their use in controlling animal pests in plant protection, and pesticidal agents comprising the compounds of Formula I as active ingredients.

Abstract: An improved process for recovering benzene and chlorine from hexachlorocyclohexanes by reacting the waste isomers from the production of lindane with zinc and electrolysis of the zinc chloride obtained, characterized in that the reaction is effected in the cathode compartment of an electrolytic cell divided by a diaphragm, the zinc being produced in situ at the cathode.

Abstract: This invention is directed to novel urea derivatives of the general formula ##STR1## wherein A represents one of the groups ##STR2## X and Y, which may be identical to or different from each other, each represent hydrogen, chlorine or bromine;Z represents hydrogen or chlorine;Z' represents chlorine or fluorine; andZ" represents hydrogen, chlorine, or fluorine.The invention is also directed to the production of compounds of Formula I, their use as pesticides, and pesticidal agents comprising the novel compounds as active substances.

Abstract: An improved method of preparing 2-methoxy-3,6-dichloro-benzoic acid which comprises the step of oxidizing 2-methoxy-3,6-dichloro-benzyl alcohol into the correspondingly substituted benzoic acid, where the improvement resides in that the said benzyl alcohol is prepared by catalytically de-brominating 2-hydroxy-5-bromo-3,6-dichloro-benzyl alcohol, followed by methylation of the 2-hydroxy substituent of the de-brominated benzyl alcohol.

Abstract: An improved method of preparing 2-methoxy-3,6-dichloro-benzoic acid which comprises the step of oxidizing 2-methoxy-3,6-dichloro-benzyl alcohol into the correspondingly substituted benzoic acid, where the improvement resides in that the said benzyl alcohol is prepared by catalytically de-brominating 2-methoxy-5-bromo-3,6-dichloro-benzyl alcohol.