Abstract: A herbicidal composition which comprises a phosphonate or phosphinate of the formula ##STR1## where R and R.sup.1, which may be the same or different, each represent straight or branch-chained alkyl of 1 to 12 carbon atoms, and x and y are each 1 or 2, the sum of x an y being 3; and phenmedipham, desmedipham, metamitron, lenacil, ethofumesate or chloridazon in association with a suitable carrier and/or surface active agent, and a method of combating weeds.

Abstract: The invention relates to new 1-chloropyrimidinyl-1H-1,2,4-triazol-3-sulphonamides of the general formual I ##STR1## in which A, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 have the meanings given in the description, processes for their preparation and their use as herbicides.

Abstract: The invention relates to a new composition for defoliation of plants with synergistic activity, containing a mixture of 1-phenyl-3-(1,2,3-thiadiazol-5-yl)urea, a carboxamide or tributyl phosphate and 3-(3,4-dichlorophenyl)-1,1-dimethylurea and its use especially for the defoliation of cotton plants.

Abstract: The invention relates to a new composition for defoliation of plants with synergistic activity, containing a mixture of 1-phenyl-3-(1,2,3-thiadiazol-5-yl)urea and 1-dodecylazacycloheptan-2-one or a mixture of 1-phenyl-3-(1,2,3-thiadiazol-5-yl)urea, 1-dodecylazacycloheptan-2-one and 3-(3,4-dichlorophenyl)-1,1-dimethylurea and its use especially for the defoliation of cotton plants.

Abstract: Novel 7-(Aryloxy)-2-naphthoxyalkanecarboxylic acid derivatives of the formula I ##STR1## in racemic or separated isomeric form, have herbicidal activity.

Abstract: New compositions for defoliating plants possessed of synergistic activity comprising(A) a compound of formula I ##STR1## in which R.sub.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl,R.sub.2 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -alkylthio,R.sub.3 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkylthio or C.sub.3 -C.sub.8 -cycloalkyl,wherein R.sub.2 and R.sub.3 taken together with the nitrogen atom to which they are attached is a morpholino- piperidino- or pyrrolidino-group,X is oxygen or sulfur,Y can be the same or different and is hydrogen, halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkoxy-C.sub.1 -C.sub.2 -alkyl, C.sub.1 -C.sub.4 -alkylthio, trifluoromethyl or nitro, andn is the number 1, 2, 3, 4 or 5,in combination with(B) a defoliant for plantsin a proportion of 1 to 99 parts by weight of component (A) to 99 to 1 parts by weight of component (B).

Abstract: New 1,2,3-thiadiazol-3-in-5-yliden-urea derivatives are disclosed of the general formula ##STR1## in which R.sub.1 is hydrogen or an, if necessary, interrupted one or more times oxygen or sulfur atom, C.sub.1 -C.sub.4 -alkyl group,R.sub.2 is an, if necessary interrupted one or more times by oxygen or sulfur atoms C.sub.1 -C.sub.4 -alkyl group, an, if necessary, substituted one or more times by alkyl C.sub.3 -C.sub.8 cycloalkyl group, an, if necessary, substituted one or more times by alkyl and/or halogen and/or alkylthio and/or alkoxy and/or trifluoromethyl and/or nitro aromatic hydrocarbon group or an, if necessary, substituted heterocyclic, at least one N-atom-containing, hydrocarbon group or R.sub.1 and R.sub.2 together with the N-atom are morpholino-, piperidino- or pyrolidino,R.sub.3 is an, if necessary, substituted C.sub.1 -C.sub.10 -alkyl group, a C.sub.2 -C.sub.6 -alkenyl, or C.sub.3 -C.sub.6 -alkenyl group, or an, if necessary, substituted aryl-C.sub.1 -C.sub.

Abstract: A composition for the defoliation of plants, particularly cotton plants, containing synergistic mixtures of 1-phenyl-3-(1,2,3-thiadiazol)-urea with O,O-dimethyl-O-(p-nitrophenyl)-thiophosphoric acid ester or O,O-diethyl-O-(p-nitrophenyl)-thiophosphoric acid ester in weight ratios from 1 part by weight 1-phenyl-3-(1,2,3-thiadiazol)-urea to 0.2 to 1000 parts by weight O,O-dimethyl-O-(p-nitrophenyl)-thiophosphoric acid ester or O,O-diethyl-O-(p-nitrophenyl)-thiophosphoric acid ester. With use of the composition the plants are not only advantageously defoliated, but also simultaneously freed of harmful insects.

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: 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: 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: 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.

Abstract: 1,2,3-Triazole carboxylic acid amides, of the formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4 and n have the meaning defined in the specification in connection with formula I. The compounds have a broad biocidal, particularly herbicidal, insecticidal, acaricidal, fungicidal and nematocidal activity. They have a high degree of selectivity towards agriculturally valuable plants.

Abstract: 1,2,3-Thiadiazole-2-id-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.1 has the meaning as given in the attached specification and wherein X is oxygen or sulfur and B is a univalent metal atom. The compounds have properties suited for controlling the natural growth and natural development of plants and in addition have a superior defoliating property.

Abstract: 1,2,3-thiadiazole-5-carboxylic acid derivatives having herbicidal and growth regulating activity and having the formula ##STR1## in which R.sub.1 is hydrogen or is alkyl of which the chain may be interrupted in one or several places by oxygen or sulfur or which may be substituted by halogen and in whichX is(a) --Y--R.sub.2, wherein R.sub.2 is hydrogen, alkyl which may be substituted, aryl which may also be substituted, aryl-C.sub.1 -C.sub.2 -alkyl which may also be substituted, or a univalent metal equivalent and wherein Y is oxygen or sulfur, or(b) wherein X constitutes the residue ##STR2## wherein R.sub.3 and R.sub.4 may be the same or different and have the meaning further defined in claim 1 of the accompanying specification.The compounds are soil- or leaf-applicable herbicides with a high activity against seed weeds and resistant weeds.

Abstract: 1,2,3-Thiadiazole-5-yl-urea derivatives of the formula ##STR1## in which R.sub.1 is hydrogen or alkyl of 1 to 5 carbon atoms, R.sub.2 is hydrogen or alkyl from 1 to 5 carbon atoms which latter may also have at least one oxygen or sulfur atom interposed in the carbon chain and wherein R.sub.3 is a heterocyclic hydrocarbon residue in which at least one nitrogen atom is present in the ring, which residue may also be substituted by the same or different substituents comprising alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, halogen, nitro or trifluoromethyl. The compounds are effective as agents for growth retardation and defoliation of plants.The invention also comprises a process of making the product and compositions in which the products are the, or one of the, effective agents.

Abstract: 1,2,3-Thiadiazole-5-yl-urea derivatives of the formula ##STR1## in which R.sub.1 is hydrogen or alkyl of 1 to 5 carbon atoms, R.sub.2 is hydrogen or alkyl from 1 to 5 carbon atoms which latter may also have at least one oxygen or sulfur atom interposed in the carbon chain and wherein R.sub.3 is a heterocyclic hydrocarbon residue in which at least one nitrogen atom is present in the ring, which residue may also be substituted by the same or different substituents comprising alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, halogen, nitro or trifluoromethyl. The compounds are effective as agents for growth retardation and defoliation of plants.The invention also comprises a process of making the product and compositions in which the products are the, or one of the, effective agents.