Abstract: Novel carbaminic acid phenyl esters of the general formula ##STR1## are described, in which R.sub.1 is C.sub.1 -C.sub.2 -alkoxy-C.sub.1 -C.sub.2 -alkyl, di-C.sub.1 -C.sub.2 -alkoxy-C.sub.1 -C.sub.2 -alkyl, cyano-C.sub.1 -C.sub.2 -alkyl, halogen-C.sub.1 -C.sub.2 -alkyl, phenyl-C.sub.1 -C.sub.2 -alkyl, 1,3-dioxolan-2-yl-methyl, 2-methyl-1,3-dioxolan-4-yl-methyl, 2,2-dimethyl-1,3-dioxolan-4-yl-methyl or aminocarbonylmethyl;R.sub.2 is phenyl optionally mono- or disubstituted by one or more substituents selected from the group consisting of halogen, methyl and methoxy; andR.sub.3 is C.sub.1 -C.sub.8 alkyl, C.sub.2 -C.sub.8 alkenyl, cyclopropyl or trichloromethyl, or R.sub.1 is methyl or ethyl, R.sub.2 is .alpha.-cyanobenzyl or 1-cyano-2-phenylethyl and R.sub.3 is ethyl.

Abstract: A composition containing at least one compound of the formula ##STR1## in which R is alkyl, alkenyl, alkinyl, halogenoalkyl or alkoxyalkyl,R.sub.1 is alkoxyalkyl or dialkoxyalkyl,R.sub.2 is alkyl or alkoxy, andx is oxygen or sulfur andn is 0, 1, 2 or 3.The compounds have a strong herbicidal effect against various weeds together with a broad selectivity in regard to agricultural plants, particularly potatoes, cotton, peanuts, carrots and rice.

Abstract: Novel carbaminic acid phenyl esters of the general formula ##STR1## are described, in which R.sub.1 is C.sub.1 -C.sub.2 -alkoxy-C.sub.1 -C.sub.2 -alkyl, di-C.sub.1 -C.sub.2 -alkoxy-C.sub.1 -C.sub.2 -alkyl, cyano-C.sub.1 -C.sub.2 -alkyl, halogen-C.sub.1 -C.sub.2 -alkyl, phenyl-C.sub.1 -C.sub.2 -alkyl, 1,3-dioxolan-2-yl-methyl, 2-methyl-1,3-dioxolan-4-yl-methyl, 2,2-dimethyl-1,3-dioxolan-4-yl-methyl or aminocarbonylmethyl;R.sub.2 is phenyl optionally mono- or disubstituted by one or more substituents selected from the group consisting of halogen, methyl and methoxy; andR.sub.3 is C.sub.1 -C.sub.8 alkyl, C.sub.2 -C.sub.8 alkenyl, cyclopropyl or trichloromethyl, or R.sub.1 is methyl or ethyl, R.sub.2 is .alpha.-cyanobenzyl or 1-cyano-2-phenylethyl and R.sub.3 is ethyl.

Abstract: A composition for growth regulation of plants or for defoliating plants comprises in combination(a) at least one compound of the formula ##STR1## wherein R.sub.1 is hydrogen or alkyl of 1 to 3 carbon atoms and R.sub.2 is hydrogen or alkyl of 1 to 4 carbon atoms and R.sub.3 has the meaning defined in the specification and X is oxygen or sulfur and(b) at least one other plant growth regulating or defoliating agent which, in combination with the compound at (a) results in a synergistic effect in regard to the growth regulating and defoliant properties. The composition is particularly suited for the defoliation of cotton plants.

Abstract: Herbicidal compositions comprising or consisting of a compound of the formula ##STR1## in which R is an aliphatic, straight chain, branched or cyclic, saturated or unsaturated hydrocarbon residue of 1 to 6 carbons, R.sub.1 is hydrogen or methyl, R.sub.2 is cyanoalkyl or alkoxyalkyl, R.sub.3 is the same or different if more than one and is hydrogen, alkyl, alkoxy, alkylthio or halogen and n is 1 or 2. The compounds have a broad soil and leaf herbicidal effect and are suited particularly for selective weed suppression in cultures like soybeans, peas, alfalfa, potatoes, maize, sorghum, rice, wheat and barley.

Abstract: Novel carbaminic acid phenyl esters of the general formula ##STR1## are described, in which R.sub.1 is C.sub.1 -C.sub.2 -alkoxy-C.sub.1 -C.sub.2 -alkyl, di-C.sub.1 -C.sub.2 -alkoxy-C.sub.1 -C.sub.2 -alkyl, cyano-C.sub.1 -C.sub.2 -alkyl, halogen-C.sub.1 -C.sub.2 -alkyl, phenyl-C.sub.1 -C.sub.2 -alkyl, 1,3-dioxolan-2-yl-methyl, 2-methyl-1,3-dioxolan-4-yl-methyl, 2,2-dimethyl-1,3-dioxolan-4-yl-methyl or aminocarbonylmethyl;R.sub.2 is phenyl optionally mono- or disubstituted by one or more substituents selected from the group consisting of halogen, methyl and methoxy; andR.sub.3 is C.sub.1 -C.sub.8 alkyl, C.sub.2 -C.sub.8 alkenyl, cyclopropyl or trichloromethyl, or R.sub.1 is methyl or ethyl, R.sub.2 is .alpha.-cyanobenzyl or 1-cyano-2-phenylethyl and R.sub.3 is ethyl.

Abstract: A process for producing compounds of 1,2,3-thiadiazole-5-carboxylic acid is described. These compounds are effective as herbicides, fungicides and plant growth controllers.

Abstract: Diurethanes of the formula ##STR1## wherein R.sub.1 is alkyl, alkenyl or halogenoalkyl andR.sub.2 is phenyl or phenyl substituted in one or more places by the same or different substituents selected from the group consisting of halogen, trifluoromethyl, alkyl and alkoxy.

Abstract: Diurethanes of the formula ##STR1## selectively damage or destroy weeds in crops of carrots, cotton, peanuts, and rice without damaging the crop plants when R.sub.1 is methyl or ethyl; R.sub.2 is propyl, butyl, isobutyl, or benzyl; R.sub.3 is hydrogen, methyl, ethyl, methoxy, or methylmercapto; and X is oxygen or sulfur.

Abstract: 1,2,3-Thiadiazole-5-carboxylic acid amide derivatives of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 have the meaning indicated in the specification. Preferably, R.sub.1 is methyl and R.sub.2 is acetyl, chloroacetyl, propionyl, valeryl, cinnamoyl, cyclohexylcarbonyl, dichlorophenoxyacetyl, benzoyl, halobenzoyl, dichlorobenzoyl or methylbenzoyl, and R.sub.3 is benzyl, halobenzyl, cyclohexyl, methyl-cyclohexyl or cyclohexylmethyl. The compounds have herbicidal, growth regulating, defoliating and fungicidal activity, although not all of these activities will be present in each of the compounds. The compounds are in addition highly selective against agriculturally valuable plants such as various grains, cotton, soybeans and plantation cultures.

Abstract: The invention concerns an agent for defoliating plants and which contains as active substance 1,2,3-thiadiazolyl ureas.

Abstract: A composition for growth regulation of plants or for defoliating plants comprises in combination(a) at least one compound of the formula ##STR1## wherein R.sub.1 is hydrogen or alkyl of 1 to 3 carbon atoms and R.sub.2 is hydrogen or alkyl of 1 to 4 carbon atoms and R.sub.3 is alkyl of 1 to 4 carbon atoms, cycloalkyl of 5 to 8 carbon atoms, phenyl, halogenophenyl, methylphenyl, methoxyphenyl is nitrophenyl and X is oxygen or sulfur and(b) at least one other plant growth regulating or defoliating agent which, in combination with the compound at (a) results in a synergistic effect in regard to the growth regulating and defoliant properties. The composition is particularly suited for the defoliation of cotton plants.

Abstract: Novel diurethanes of the general formula ##STR1## are described, in which R.sub.1 is hydrogen, C.sub.1 -C.sub.4 alkyl or C.sub.2 -C.sub.4 alkenyl, R.sub.2 is phenyl, methylphenyl, methoxyphenyl, chlorophenyl, dichlorophenyl, cyclohexyl, benzyl or phenylethyl, R.sub.3 is C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 alkenyl, C.sub.2 -C.sub.4 alkinyl, chloro-C.sub.1 -C.sub.4 alkyl, chloro-C.sub.2 14 C.sub.4 alkenyl, or chloro-C.sub.2 -C.sub.4 alkinyl and X is oxygen or sulfur. Compositions containing at least one of the compounds of the general formula exhibit exceptional selective herbicidal properties.

Abstract: Carbamic acid ester of the formula ##STR1## in which R and R.sub.1 are the same or different and are hydrogen, an aliphatic hydrocarbon residue which may also be substituted, a cycloaliphatic hydrocarbon residue which may also be substituted, an aromatic hydrocarbon residue which may also be substituted or a heterocyclic residue or wherein R and R.sub.1 together with the adjoining nitrogen atom form a heterocyclic residue.The compounds of the invention are herbicidal agents of particularly strong activity.

Abstract: New m-diurethanes having selective herbicidal action are provided, including their preparation.

Abstract: 2-(dimethylcarbamoylimino)-benzthiazoline-3-id-salts of the formula ##STR1## in which B.sup.(+) is a univalent metal equivalent. The compounds have herbicidal activity and may be used in herbicidal compositions.

Abstract: The specification discloses methods for the preparation and use of the compound N-phenyl-N'-1,2,3-thiadiazole-5-yl-thiourea in the regulation and control of plant growth.

Abstract: 1,2,3-Thiadiazole-3-in-5-ylidene-urea derivative of the formula ##STR1## in which R.sub.1 is hydrogen or alkyl which may be substituted in one or several places by oxygen or sulfur and wherein R.sub.2 and R.sub.3 have the meaning as given in the attached specification and wherein X is oxygen or sulfur. The compounds have properties suited for controlling the natural growth and natural development of plants and in addition have a superior defoliating property without accompanying unpleasant odors.

Abstract: A 1,2,4-oxadiazole derivative of the formula ##STR1## in which R.sub.1 and R.sub.2 are the same or different and are C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl, halogeno-C.sub.1 -C.sub.3 -alkyl, phenyl, or phenyl substituted in one or several places by C.sub.1 -C.sub.4 alkyl, and/or C.sub.1 -C.sub.4 -alkoxy and/or trihalogenomethyl and/or halogen and/or cyano or are phenyl-C.sub.1 -C.sub.3 -alkyl, provided that at least one of R.sub.1 or R.sub.2 is constituted by the group ##STR2## in which R.sub.3 is C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl, halogeno-C.sub.1 -C.sub.3 -alkyl, C.sub.1 -C.sub.6 -alkoxy, C.sub.1 -C.sub.4 -alkamino or di-C.sub.1 -C.sub.4 -alkamino. The compounds of the invention have a high activity against both mono- and di-cotyl weeds together with a high selectivity for agricultural plants such as rice, winter cereals, maize, cotton, sunflower, peanuts, soybeans, peas, alfalfa, clover and other leguminous plants.

Abstract: The specification discloses 5-alkylsulfonyl- and 5-alkylsulfinyl-1,3,4-thiadiazol-2-yl ureas which are characterized by a selective herbicidal activity against weeds while being innocuous against crop plants thus providing means and methods for the protection of fields of growing crops against infestation by undesirable weeds and grasses.