Abstract: Fungicidal pyridinylpyrimidines of the formula ##STR1## in which R.sup.1 represents hydrogen, halogen, alkoxy, alkylthio, halogenoalkyl, amino or dialkylamino, where, in the case of dialkylamino, the two radicals may, together with the nitrogen to which they are bonded, form a 5- to 7-membered, saturated or unsaturated ring which optionally contains a further hetero atom and which is optionally substituted by 1 or 2 alkyl groups; orR.sup.1 represents in each case optionally substituted aryloxy, arylthio, aralkyloxy or aralkylthio,R.sup.2 and R.sup.3 are independent of one another and are identical or different and in each case represent hydrogen, halogen, alkyl, halogenoalkyl, alkoxy, alkylthio or alkoxycarbonyl,orR.sup.2 and R.sup.3 together represent anaylene chain having 3 to 6 carbon atoms which are linked via the ring positions 3 and 4 or 4 and 5,R.sup.

Abstract: New substituted pyridyltriazines of the formula (I) ##STR1## in which R.sup.1 and R.sup.2 have the meanings given in the description, and their use for combating pests.The compounds can be prepared by analogous processes, for example by reacting pyridylamidine hydrochloride with suitable methyl imidates or with suitable benzene-isothiocyanates, or by desulphurising mercapto-substituted pyridyltriazines or by reacting them with alcohols. The mercapto-substituted compounds are also new and can be prepared by analogous processes.

Abstract: Fungicidally active 3-(2-chloro-3-trifluoro-methylphenyl)-4-cyanopyrrole of the formula ##STR1##

Abstract: Herbecidal substituted 4,5-diamino-1,2,4-triazol-3-(thi)ones of the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each independently is hydrogen or and organic radical,X is O or S, andY is O or S.

Abstract: Fungicidal thiadiazole-substituted acrylic acid esters of the formula ##STR1## in which R.sup.1 represents hydrogen, unsubstituted or substituted alkyl or alkenyl, or in each case unsubstituted or substituted aralkyl, aralkenyl, aryl or heteroaryl,R.sup.2 represents alkyl,R.sup.3 represents dialkylamino or a radical --Z--R.sup.4,Y represents oxygen, sulphur or a radical ##STR2## R.sup.4 represents alkyl or unsubstituted or substituted aralkyl, R.sup.5 represents hydrogen or alkyl andZ represents oxygen or sulphur.

Abstract: Herbicidal substituted 4,5-diamino-1,2,4-triazol-3-(thi)ones of the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each independently is hydrogen or an organic radical,X is O or S, andY is O or S.

Abstract: Fungicidal N-vinyl-3-cyano-4-phenyl-pyrroles of the formula ##STR1## in which R.sup.1 represents alkyl,R.sup.2 represents alkyl, orR.sup.1 and R.sup.2 together with the nitrogen atom to which they are bonded form a 5- to 7-membered, saturated ring which is optionally monosubstituted to polysubstituted by identical or different substituents,R.sup.3 represents alkyl,R.sup.4 represents hydrogen, halogen, alkyl, halogenaolakyl, alkoxy, halogenoalkoxy, alkylthio or halogenoalkylthio,R.sup.5 represents hydrogen, halogen, alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, alkylthio or halogenoalkylthio, orR.sup.4 and R.sup.5 together represent halogen-substituted alkylenedioxy, andR.sup.6 represents hydrogen or halogen.

Abstract: Fungicidal thiadiazole-substituted acrylic acid esters of the formula ##STR1## in which R.sup.1 represents hydrogen, unsubstituted or substituted alkyl or alkenyl, or in each case unsubstituted or substituted aralkyl, aralkenyl, aryl or heteroaryl,R.sup.2 represents alkyl,R.sup.3 represents dialkyl amino or a radical --Z--R.sup.4,Y represents oxygen, sulphur or a radical ##STR2## R.sup.4 represents alkyl or unsubstituted or substituted aralkyl, R.sup.5 represents hydrogen or alkyl andZ represents oxygen or sulphur.

Abstract: A fungicidal 4-aza-1,10-phenanthroline derivatives of the formula ##STR1## in which R.sup.1 and R.sup.2 are identical or different and stand for hydrogen, alkyl, optionally substituted aryl, optionally substituted hetaryl, or together with the carbon atoms to which they are bonded stand for a benzo group,R.sup.3 and R.sup.4 are identical or different and stand for hydrogen or alkyl andR.sup.5 and R.sup.6 individually stand for hydrogen or together with the carbon atoms to which they are bonded stand for a benzo group, with the exception of the compound 4-aza-1,10-phenanthroline,and addition products thereof with acids and metal salts.

Abstract: Fungicidally and bactericidally active 3-chloro-1,2,4-oxadiazoles of the formula ##STR1## in which R represents optionally substituted aryl or represents optionally substituted heteroaryl.

Abstract: Herbicidal compositions comprising ##STR1## and as a synergist an amide of the formula ##STR2## in which R is halogenoalkyl.

Abstract: Fungicidally active novel N-(3-chloro-1,2,4-oxadiazol-5-yl)-ureas of the formula ##STR1## in which R is alkyl, halogenoalkyl, or optionally substituted cycloalkyl, cycloalkylalkyl or aryl.

Abstract: Process for the preparation of pyrazole from hydrazine hydrate and acrolein comprising reacting hydrazine hydrate with acrolein in an aqueous-organic medium at a temperature between 20.degree.-80.degree. C. and then oxidizing the 2-pyrazoline formed, of the formula ##STR1## either directly or after first being isolated, with chlorine or an alkali metal hypochlorite or an alkaline earth metal hypochlorite and water or an aqueous-organic medium at a temperature between 0.degree. and 60.degree. C.

Abstract: Process for the preparation of pyrazole by heating a pyrazoline derivative of the general formula ##STR1## in which R represents an optionally substituted phenyl radical, or an alkyl or halogenoalkyl radical, without the addition of an acid or base, at a temperature between 100.degree. and 200.degree. C. under a pressure between 1 mbar and 10 bars, optionally in the presence of a diluent.