Abstract: Pesticidal dicyanohydrin (thiono)(dithio)-phosphates(phosphonates) of the general formula ##STR1## in which X represents oxygen or sulphur,R represents an optionally substituted radical selected from alkyl, alkenyl, alkinyl, aryl, aralkyl, alkoxy, aryloxy, aralkoxy, alkylthio, arylthio, aralkylthio, alkylamino (mono- and dialkylamino), arylamino and aralkylamino, andR.sup.1 and R.sup.2 are identical or different and individually represent a hydrogen atom, an optionally substituted radical selected from alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkenyl, aralkyl, aralkenyl and aryl, or an optionally substituted heterocyclic radical,are new and are particularly effective in combating pests, such as insects and acarids, in synergistic combinations with other compounds which are active against arthropods.

Abstract: Aryl N-oxalyl-N-methyl-carbamates of the general formula ##STR1## in which X represents an alkoxy, alkenoxy, alkinoxy, aryloxy, alkylthio, alkenylthio, alkinylthio or arylthio radical, each of which may be optionally substituted, or represents a radical of the general formula --N R.sup.3 R.sup.4, wherein R.sup.3 and R.sup.4 are identical or different and represent a hydrogen atom or an alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkenyl or aryl radical, each of which may be optionally substituted,or the radicals R.sup.3 and R.sup.4, together with the N atom to which they are bonded, form an optionally substituted heterocyclic ring, andR.sup.1 represents an aryl radical which is optionally substituted,are novel and find use as pesticides, especially for combating insects, acarids and nematodes.

Abstract: In a synergistic pesticidal composition comprising (1) a pesticidally active compound and (2) a synergizing agent in amount sufficient to synergize the pesticidal activity of the pesticidally active compound, the improvement which comprises employing as the synergizing agent a 2-(thi)oxo-1,3,2-oxazaphospholane of the formula ##STR1## in which X represents oxygen or sulphur,R represents an optionally substituted alkyl, alkenyl, alkynyl, phenyl, alkoxy, alkenoxy, alkynoxy, alkylthio, aralkoxy, amino, mono- or di-alkylamino, heterocyclic amino, N-alkyl-N-aryl-amino, phenoxy or phenylthio radical,R.sup.1 represents hydrogen, optionally substituted alkyl, aralkyl, alkenyl, alkynyl or dialkylaminoalkyl,R.sup.2 represents hydrogen, alkylthioalkyl, or optionally substituted alkyl or aralkyl, or R.sup.1 and R.sup.2 together represent alkylene,R.sup.3 represents hydrogen or alkyl andR.sup.4 represents hydrogen, alkyl, or phenyl.

Abstract: Benzyl esters of the formula ##STR1## in which n is 1,2,3,4, or 5,R.sup.2 is hydrogen, C.sub.1-4 -alkyl, cyano or ethynyl,R.sup.3 is radical of a carboxylic acid customary in pyrethroids or pyrethroid-like compounds, andat least one R.sup.1 is fluoroalkoxy or fluoroalkylmercapto, or two together are fluoromethylene- or fluoroethylene-dioxy, and the others, if present, are hydrogen or various radicals,which possess arthropodicidal properties. Various alcohols, amines, aldehydes, halides, and the like, corresponding to the alcohol moieties of the esters are also synthesized.

Abstract: 3,5-Dihalogeno-1,2-methylenedioxybenzenes of the formula ##STR1## in which R is hydrogen, halogen, cyano or an optionally substituted alkyl, alkenyl, alkynyl, aralkyl or acyl radical, andX and Y each independently is halogen,which synergize with known arthropodicides.

Abstract: A pentafluorobenzyl 2,2-dimethyl-3-vinylcyclopropane carboxylate of the formula ##STR1## in which R is hydrogen or halogen, andR.sup.1 is optionally substituted phenyl, orR and R.sup.1 together constitute an alkylene chain with at least two carbon atoms,which possess arthropodicidal properties.

Abstract: N-Acylated N-methyl-carbamic acid O-pyrazol-4-yl esters of the formula ##STR1## in which R represents an optionally substituted alkyl, alkenyl, alkynyl, cycloalkyl, aralkyl or aryl radical,Z represents an acyl radical,l represents 1 or 2,m represents 1 or 2 andn represents zero or 1,which possess pesticidal activity.

Abstract: Pesticidal compositions comprise synergistic mixtures of active compounds 1R-(-)-[(pentafluorophenyl)-methyl]-3S-3-(2,2-dichloroethenyl)-2,2-dimethy lcyclopropanecarboxylate and O,O-dimethyl O-2,2-dichlorovinyl phosphate (dichlorvos) and, if appropriate, O-isopropoxyphenyl N-methylcarbamate (propoxur). These compositions may be used for combating arthropods.

Abstract: Fluorine-containing phenylacetic acid esters of the formula ##STR1## in which R represents the radical of an alcohol customary in the case of pyrethroids,R.sup.1 represents C.sub.2-4 -alkyl, C.sub.2-4 -alkenyl or cyclopropyl,X represents H, halogen, alkyl, alkoxy, OCHF.sub.2, SCHF.sub.2, SCClF.sub.2 or SCF.sub.3 andX.sup.1 can vary widely or form a fused ring with X,the overall compound necessarily containing a fluorine atom, which compounds possess arthropodicidal properties. Intermediates therefor and an overall synthesis from an alcohol of the formula ROH and a toluene of the formula ##STR2## are also shown.

Abstract: In a synergistic pesticidal composition comprising (1) a pesticidally active compound and (2) a synergizing agent in amount sufficient to synergize the pesticidal activity of the pesticidally active compound, the improvement which comprises employing as the synergizing agent a 2-(thi)oxo-1,3,2-oxazaphospholane of the formula ##STR1## in which X represents oxygen or sulphur,R represents an optionally substituted alkyl, alkenyl, alkynyl, phenyl, alkoxy, alkenoxy, alkynoxy, alkylthio, aralkoxy, amino, mono- or di-alkylamino, heterocyclic amino, N-alkyl-N-aryl-amino, phenoxy or phenylthio radical,R.sup.1 represents hydrogen, optionally substituted alkyl, aralkyl, alkenyl, alkynyl or dialkylaminoalkyl,R.sup.2 represents hydrogen, alkylthioalkyl, or optionally substituted alkyl or aralkyl, or R.sup.1 and R.sup.2 together represent alkylene,R.sup.3 represents hydrogen or alkyl andR.sup.4 represents hydrogen, alkyl, or phenyl.

Abstract: N-Methyl-carbamic acid O-pyrazol-4-yl esters of the formula ##STR1## in which R is optionally substituted alkyl, alkenyl, alkynyl, cycloalkyl or phenyl, which possess insecticidal, acaricidal and nematicidal properties.

Abstract: 4-Fluoro-3-phenoxy-benzyl 3-alken-1-yl-2,2-dimethylcyclopropanecarboxylates have the general formula ##STR1## wherein R represents alkyl or alkenyl,R.sup.1 represents hydrogen or alkyl, with the proviso that R and R.sup.1 are different, andR.sup.2 represents hydrogen, cyano or alkyl, alkenyl or alkynyl having in each case up to 4 carbon atoms,are obtained if 3-alken-1-yl-2,2-dimethyl-cyclopropanecarboxylic acids of the general formula ##STR2## wherein R and R.sup.1 have the meaning given above, or reactive derivatives of these acids, are reacted with 4-fluoro-3-phenoxy-benzyl alcohols of the general formula ##STR3## wherein R.sup.2 has the meaning given above, or with reactive derivatives of these alcohols, if appropriate in the presence of an acid acceptor and/or catalyst, and if appropriate using a diluent. The compounds of the formula (I) have a high pesticidal activity, especially against insects or acarids.

Abstract: 1-Aryl-cyclopropane-1-carboxylic acid esters of the formula ##STR1## in which R.sup.1 represents a hydrogen atom, a cyano radical or an alkyl, alkenyl or alkinyl radical within each case up to 7 carbon atoms, andR.sup.2 represents a phenyl radical which is substituted by halogen and/or optionally halogen-substituted phenoxy, with the proviso that the radical R.sup.2 in total contains at least one fluorine substituent,R.sup.3 and R.sup.4, which can be identical or different, represents a fluorine, chlorine or bromine atom or a methyl radical,R.sup.5 represents a hydrogen or halogen atom or a methyl or methoxy radical, andR.sup.6 represents a hydrogen or halogen atom, a cyano nitro or amino radical or an optionally halogen-substituted radical selected from C.sub.1 to C.sub.4 alkyl, C.sub.1 to C.sub.4 alkoxy and C.sub.1 to C.sub.4 alkylthio,or whereinthe two radicals R.sup.5 and R.sup.6 together represent an optionally halogen-substituted C.sub.1 or C.sub.

Abstract: Fluorine-containing phenylacetic acid esters of the formula ##STR1## in which R represents the radical of an alcohol customary in the case of pyrethroids,R.sup.1 represents C.sub.2-4 -alkyl, C.sub.2-4 -alkenyl or cyclopropyl,X represents H, halogen, alkyl, alkoxy, OCHF.sub.2, SCHF.sub.2, SCClF.sub.2 or SCF.sub.3 andX.sup.1 can vary widely or form a fused ring with X, the overall compound necessarily containing a fluorine atom, which compounds possess arthropodicidal properties. Intermediates therefor and an overall synthesis from an alcohol of the formula ROH and a toluene of the formula ##STR2## are also shown.

Abstract: A 3-(2,chloro-3,3,4,4,4-pentafluoro-1-butenyl)-2,2-dimethyl-cycloproanecarbo xylic acid ester of the formula ##STR1## in which R.sup.1 represents hydrogen, cyano or an alkyl, alkenyl or alkynyl radical with in each case up to 4 carbon atoms, andR.sup.2 represents a phenyl radical which is substituted by fluorine and/or by optionally fluorine-substituted C.sub.1 -C.sub.2 -alkylenedioxy and/or by optionally fluorine-substituted phenoxy, with the proviso that the radical R.sup.2 contains a total of at least one fluorine-substituent which possesses insecticidal and acaricidal activity.

Abstract: 1-Hydroxy-2,2,2-trichloroethane-thionophosphonic acid dialkyl esters of the formula ##STR1## in which R and R.sub.1 each independently is an alkyl radical with 1 to 4 carbon atoms,which possess arthropodicidal properties.

Abstract: 2-Substituted benzazoles of the formula ##STR1## in which R represents optionally substituted alkyl, alkenyl, alkynyl, cycloalkyl, optionally substituted aryl or optionally substituted aralkyl,R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently of one another represent hydrogen, halogen, optionally halogen-substituted alkyl, optionally halogen-substituted alkoxy, nitro, cyano, alkylcarbonyl or alkoxycarbonyl, or two radicals in combination form a benzo radical,X and Y independently of one another represent oxygen or sulphur andn represents zero or 1,synergize conventional pesticides. Those benzazoles in whichR is --CH.sub.2 --C.dbd..tbd.CH,R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent independently of one another hydrogen or halogen (preferably chlorine),Y represents oxygen andn represents 1,are new and exhibit particularly high synergistic activity.

Abstract: 2-Cycloalkyl-pyrimidin-5-yl-(thiono)(thiol)-phosphoric-(phosphonic) acid esters and ester-amides of the formula ##STR1## in which R is alkyl,R.sup.1 is alkyl, alkoxy, alkylthio, alkylamino or phenylR.sup.2 is hydrogen or alkyl,R.sup.3 is cycloalkyl, andX is oxygen or sulphur which possess insecticidal, acaricidal and nematicidal properties.

Abstract: 2,2,3,3-Tetramethylcyclopropanecarboxylic acid fluorine-substituted-benzyl esters of the formula ##STR1## in which R.sup.1 is hydrogen, cyano, or alkyl, alkenyl or alkynyl each with up to 4 carbon atoms, andR.sup.2 is a phenyl radical which is substituted by halogen and/or by optionally halogen-substituted phenoxy, with the proviso that the radical R.sup.2 in total contains at least one fluorine substituent,which possess insecticidal and acaricidal properties.

Abstract: Fluorine-substituted spirocarboxylic acid benzyl esters of the formula ##STR1## in which R.sup.1 represents hydrogen, cyano or alkyl, alkenyl or alkynyl, with in each case up to 4 carbon atoms,R.sup.2 represents a phenyl radical which is substituted by halogen and/or by optionally halogen-substituted phenoxy, with the proviso that the radical R.sup.2 contains in total at least one fluorine substituent, andR.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represent hydrogen, halogen or alkyl, orR.sup.3 and R.sup.4, taken together, and/or R.sup.5 and R.sup.6, taken together, represent alkanediyl (alkylene) or a fused-on benzo radical,and the C atoms of the 5-member spirocyclic ring are linked to one another either by double bonds or by single bonds, which possess arthropodicidal properties.