Abstract: Novel urea derivatives of the formula ##STR1## wherein R and R.sub.1 are individually selected from the group consisting of hydrogen, chlorine, bromine, nitro, trifluoromethyl, lower alkyl of 1 to 6 carbon atoms and lower alkoxy of 1 to 6 carbon atoms, n is 0 or 1, X is selected from the group consisting of lower alkyl of 1 to 6 carbon atoms optionally substituted with halogen and a nitrogen heterocyclic optionally containing 1 or more other heteroatoms, Y is selected from the group consisting of hydrogen, alkyl of 1 to 4 carbon atoms and S--Z wherein Z is a nitrogen heterocyclic optionally containing 1 or more other heteroatoms and the dotted lines indicate that the compound of formula I may contain no oxygen bound to the sulfur atom or may be in sulfoxide or sulfonyl form which are useful as herbicides and thereon preparation.

Abstract: Novel selective herbicidal compositions comprising an herbicidally effective amount of at least one compound selected from the group consisting of N-methyl-N-isopropylthio-N'-phenyl-urea, N-methyl-N-(2-chloroethylthio)-N'-(3,4-dichlorophenyl)-urea, N-methyl-N-n-butylthio-N'-(4-isopropylphenyl)-urea, N-methyl-N-isopropylthio-N'-(4-isopropylphenyl)-urea, N-methyl-N-isopropylthio-N'-(3,4-dimethylphenyl)-urea and N-methyl-N-n-butylthio-N'-(3,4-dimethylphenyl)-urea and a carrier and a method of selectively killing weeds in cereal crops and fields of beets.

Abstract: Novel .beta.-ketone compounds of the formula ##STR1## wherein R is a linear or branched alkyl of 4 to 10 carbon atoms optionally containing a double bond or an epoxy and optionally substituted with a branched or linear alkoxy of 1 to 3 carbon atoms, Z is selected from the group consisting of --CH=CH--, --CHOH--CH=CH--, ##STR2## and --OCH.sub.2 --, X is selected from the group consisting of hydrogen and methyl, Y is selected from the group consisting of linear and branched alkoxy of 1 to 5 carbon atoms and ##STR3## and R' and R" are linear or branched alkyl of 1 to 4 carbon atoms which are insecticides and their preparation.

Abstract: Novel tetrahydrofuran derivatives of the formula ##EQU1## wherein R is a branched or linear alkyl of 1 to 10 carbon atoms and R.sub.1 is alkyl of 1 to 5 carbon atoms and X is selected from the group consisting of chlorine, bromine, --OH and alkylcarbonyloxy of 2 to 5 carbon atoms useful as insecticides and their preparation.