Abstract: A method for controlling soil-borne insects such as southern corn rootworm is disclosed and exemplified in which the pyrethroid 2,4,6-trifluorophenylmethyl 3-(2-chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethylcyclopropanecarboxylat e is applied to the soil for initial and residual insect control.

Abstract: A method is described for the control of nematodes and soil-borne insects in agricultural crops which comprises applying to the situs of infestation a composition containing as active ingredient a compound of the formulaR--Z--(CH.sub.2).sub.n --Qwherein R is an alkyl radical of one or two carbon atoms carrying one-to-four fluorine substituents and one-to-three chlorine or bromine substituents represented as CF.sub.p X.sub.(3-p) -- or CF.sub.r X.sub.(3-r) --CF.sub.s X.sub.(2-s) --; Z is --(CH.sub.2 --CHX)-- or --(CH.dbd.CH)--; X is chlorine or bromine; Q is methyl, isopropyl, tert-butyl, or C.sub.3 -C.sub.6 cycloalkyl; n is 5 to 12 as required to yield in the compound a chain of 10 to 16 carbon atoms; p is 1 or 2; r is 2 or 3; s is 0 or 1 or 2. A process for preparation of active ingredient compounds is described, and utility of compositions against nematodes and soil-borne insects is exemplified.

Abstract: Novel 3-isoxazolidinone compounds and novel hydroxamic acid intermediates from which they are prepared exhibit herbicidal activity to grassy and broad-leaf plant species while leaving legumes, especially soybeans, unaffected. The preparation and herbicidal activity of the compounds is exemplified.

Abstract: Novel substituted benzoyloxy compounds exhibit plant regulator activity, retarding or stimulating the growth of a variety of broadleaved plants, while leaving grasses unaffected. The preparation and plant regulator activity of the compounds is exemplified.

Abstract: 2-Substituted isoxazolidine-3,5-diones and isoxazolidine-3-one-5-thiones exhibit herbicidal activity, controlling effectively the growth of a wide spectrum of grassy and broad-leaved plant species. The preparation and herbicidal activity of the compounds is exemplified.

Abstract: The compound O,O-diethyl S-(tert-butylthiomethyl) phosphorodithioate exhibits a broad spectrum of nematicidal activity.

Abstract: A new class of herbicidal compounds consisting of 1,3-dioxanes carrying substituents other than hydrogen in the 2-, 4-, 5-, and 6-positions of the dioxane ring exhibits preemergence and postemergence herbicidal activity, controlling effectively the growth of selected grassy species. The synthesis of members of this class is described in detail, and the utility of representative compounds in exemplified.

Abstract: Selected mono-5-substituted-3-chloro-4H-1,2,6-thiadiazin-4-ones having the general formula ##STR1## are described which are useful for control of fungal disease in plants.

Abstract: A new class of herbicidal compounds consisting of 1-alkyl- and 1,1-dialkyl-3-(4-substituted-3-amino-5-isothiazolyl)ureas and N-(4-substituted-3-amino-5-isothiazolyl)-alkanamides, in which the 4-substituent consists of cyano and carbamoyl, exhibits preemergence and postemergence herbicidal activity, controlling effectively the growth of a wide spectrum of grassy and broad-leaved plant species. The synthesis of members of this class is described in detail, and the utility of representative compounds is exemplified.

Abstract: A new class of herbicidal compounds consisting of 1-alkyl- and 1,1-dialkyl-3-(4-substituted-3-alkoxy-5-isothiazolyl)ureas and N-(4-substituted-3-alkoxy-5-isothiazolyl)alkanamides, in which the 4-substituent consists of alkoxycarbonyl, cyano and carbamoyl, exhibits preemergence and postemergence herbicidal activity, controlling effectively the growth of a wide spectrum of grassy and broad-leaved plant species. The synthesis of members of this class is described in detail, and the utility of representative compounds is exemplified.

Abstract: Production of c-5-aralkoxy-r-2-substituted-5-alkyl-1,3-dioxanes by epoxidizing the double bond of a 2-substituted-5-alkylidene-1,3-dioxane to form a cis epoxide, hydrogenolyzing said epoxide to form a 2-substituted-5-alkyl-5-hydroxy-1,3-dioxane in which there is a cis relationship between the 5-hydroxy and the 2-substituent, and etherifying said hydroxydioxane with an aralkyl halide.

Abstract: A new class of herbicidal compounds consisting of 1-alkyl- and 1,1-dialkyl-3-(3,4-substituted-5-isothiazolyl)ureas and N-(3,4-substituted-5-isothiazolyl)-alkanamides in which the 3-substituent consists of alkylthio, alkylsulfinyl, and alkylsulfonyl, and the 4-substituent consists of cyano, and carbamoyl, exhibits preemergence and postemergence herbicidal activity, controlling effectively the growth of a wide spectrum of grassy and broad-leaved plant species. The synthesis of members of this class is described in detail, and the utility of representative compounds is exemplified.

Abstract: A new class of herbicidal compounds consisting of 1-alkyl- and 1,1-dialkyl-3-(3-substituted-4-nitro-5-iso-thiazolyl)ureas in which the 3-substituent consists of alkyl, alkoxy, alkylamino, alkylthio, alkylsulfinyl, and alkylsulfonyl exhibits preemergence and postemergence herbicidal activity, controlling effectively the growth of a wide spectrum of grassy and broad-leaved plant species. The synthesis of a representative member of this class is described in detail, and its utility is exemplified.

Abstract: Novel compositions including alkyl(2-hydroxycycloalkyl)-dimethylammonium salts as an essential active ingredient provide a method of regulating development of plants without killing the plants. The synthesis of members of the class of active compounds is described, and the utility of representative compositions is exemplified.

Abstract: A new class of herbicidal compounds consisting of 1,3-dioxanes carrying substituents other than hydrogen in the 2-, 4-, 5-, and 6-positions of the dioxane ring exhibits preemergence and postemergence herbicidal activity, controlling effectively the growth of selected grassy species. The synthesis of members of this class is described in detail, and the utility of representative compounds is exemplified.

Abstract: A new class of herbicidal compounds consisting of N'-(substituted-5-isothiazolyl)-N,N-dimethylformamidines in which the 3-substituent on the isothiazole moiety consists of alkyl, alkoxy, alkylthio, alkylsulfinyl, alkylsulfonyl, alkylamino and dialkylamino, and the 4-substituent on the isothiazole moiety consists of cyano, carbamoyl, and nitro, and in which the hydrogen of the dimethylformamidine moiety may be substituted by fluorine, chlorine, bromine, or carbonitrile, exhibits preemergence and postemergence herbicidal activity, controlling effectively the growth of a wide spectrum of grassy and broad-leaved plant species. The synthesis of members of this class is described in detail, and the utility of representative compounds is exemplified.

Abstract: A new class of herbicidal compounds consisting of N,N-dialkyl-N'-(substituted-5-isothiazolyl)-N'-acylureas in which the 3-substitutent on the isothioazole moiety consists of alkyl, alkoxy, alkylthio, alkylsulfinyl, alkylsulfonyl, alkylamino, and dialkylamino, and the 4-substituent on the isothiazole moiety consists of cyano, alkoxycarbonyl, and nitro; and in which the nitrogen atom of the N,N-dialkylurea to which the isothiazolyl moiety is bonded, is also bonded to an acyl moiety, exhibits outstanding preemergence and postemergence herbicidal activity, controlling effectively the growth of a wide spectrum of grassy and broad-leaved plant species. The synthesis of members of this class is described in detail and the utility of representative compounds is exemplified.

Abstract: A method is described for the control of nematodes in agricultural crops which comprises applying to the situs of infestation a nematicidal composition containing as active ingredient a compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 are hydrogen, lower alkyl, or halogen, X is hydrogen or halogen, n is 1 or 2, Y is hydrogen, lower alkyl, halogen, trifluoromethyl, lower alkoxy, lower alkylthio, and nitro when n is 1, and halogen when n is 2, with the proviso that at least 1 of R.sub.1, R.sub.2, and X must be halogen. Preparation of active ingredient compounds is described, and nematicidal utility of compositions is exemplified.