Abstract: The invention provides a pyridazinone derivative having a high insecticidal and miticidal activity against agricultural noxious insects. The pyridazinone derivative of the invention is represented by the formula (1) ##STR1## wherein R is a hydrogen atom, an alkyl group, an alkoxyalkyl group, or a phenyl group which may have 1 or 2 substituents in an optional position.

Abstract: Disclosed is a phosphoric acid ester derivative represented by the general formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are each lower alkyl, X.sup.1 and X.sup.2 are the same or different and are each a hydrogen atom or halogen atom, and Y is an oxygen atom or sulfur atom. The phosphoric acid ester derivatives of the present invention are usable as insecticides and miticides having excellent residual activity and low toxicity to warm blooded animals.

Abstract: This invention provides an imidazole derivative represented by the formula ##STR1## wherein R is lower alkyl, lower alkoxyalkyl, lower alkoxycarbonylmethyl or cyanomethyl, and X.sup.1 and X.sup.2 are each a hydrogen atom or halogen atom, process for preparing the derivative, and a fungicidal compositions comprising the derivative for use in agriculture and horticulture.

Abstract: A pyran derivative represented by a general formula ##STR1## wherein R.sub.1 is hydrogen, lower alkyl, cycloalkyl or phenyl, R.sub.2 is alkyl having 8 to 20 carbon atoms, R.sub.3 is hydrogen, halogen, ##STR2## or --CH.sub.2 N A, R.sub.4 and R.sub.5 being each lower alkyl or cycloalkyl, A being --CH.sub.2 13 , oxygen or nitrogen atom, N A forms five or six-member ring (the ring may have no substitutent or have at least one substituent selected from lower alkyl, lower alkoxy and halogen atom), or an acid salt thereof, are useful as agricultural miticides.

Abstract: This invention provides an imidazol-1-yl-carboxylic acid ester derivative represented by the formula ##STR1## wherein R.sup.1 is lower alkyl, cycloalkyl or R.sup.3 (CH.sub.3).sub.2 C--(wherein R.sup.3 is halogenomethyl, acyloxymethyl or alkoxycarbonyl), R.sup.2 is a hydrogen atom, lower alkyl or cycloalkyl, X is a hydrogen atom, halogen atom, lower alkyl, cycloalkyl, lower alkenyl, lower alkoxyl, lower alkenyloxy, lower alkynyloxy, lower alkylthio, haloalkyl, haloalkenyl, substituted or unsubstituted phenyl, substituted or unsubstiuted benzyl, substituted or unsubstituted phenoxy, nitro, cyano, --COR.sup.4 l (wherein R.sup.4 is lower alkoxyl, lower alkenyloxy, benzyloxy, lower alkylamino or anilino)or ##STR2## (wherein R.sup.5 and R.sup.

Abstract: A pyran derivative represented by a general formula ##STR1## wherein R.sub.1 is hydrogen, lower alkyl, cycloalkyl or phenyl, R.sub.2 is alkyl having 8 to 20 carbon atoms, R.sub.3 is hydrogen, halogen, ##STR2## R.sub.4 and R.sub.5 being each lower alkyl or cycloalkyl, A being --CH.sub.2 --, oxygen or nitrogen atom, ##STR3## forms five or six-member ring (the ring may have no substituent or have at least one substituent selected from lower alkyl, lower alkoxy and halogen atom), or an acid salt thereof, are useful as agricultural miticides.

Abstract: Disclosed are novel phosphoric ester derivatives of the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 each represents a lower alkyl group; R.sup.3 represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group or a lower alkylthio group; X.sup.1 and X.sup.2 are the same or different and each represents a hydrogen atom or a halogen atom; and Y represents an oxygen atom or a sulfur atom, and insecticidal and miticidal compositions containing said derivatives.

Abstract: .gamma.-Pyrone phosphoric ester derivative represented by the general formula below is useful as an effective component of an insecticidal or miticidal composition for agricultural and horticultural uses. ##STR1## wherein R.sup.1 is hydrogen, lower alkyl group, lower alkenyl group, cycloalkyl group or phenyl group, R.sup.2 is hydrogen or lower alkyl group unsubstituted or substituted with halogen atom, A is --SR.sup.3 or --NR.sup.4 R.sup.5, B is OR.sup.6, R.sup.3 being lower alkyl group, cycloalkyl group or phenyl group, R.sup.4 being hydrogen or lower alkyl group, R.sup.5 being lower alkyl group, lower alkenyl group, cycloalkyl group, phenyl group or benzyl group, R.sup.4 and R.sup.5 may link to form piperidino or morpholino group, R.sup.6 being lower alkyl group, cycloalkyl group or phenyl group, Y is oxygen or sulfur atom.

Abstract: A sulfenyl carbamate derivative represented by the formula ##STR1## wherein Ar represents ##STR2## R.sup.1 represents --X--COO--R.sup.3 or --Y--CN in which X and Y is each an alkylene group having 1 to 6 carbon atoms and R.sup.3 is an alkyl group having 1 to 8 carbon atoms; R.sup.2 represents --CH.sub.2 --.sub.n O--R.sup.4 in which R.sup.4 is an alkyl group having 1 to 5 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, a phenyl group or a benzyl group; and n is an integer or 2 to 5.

Abstract: A process for purifying an aminosulfenylcarbamate derivative represented by the formula (I) ##STR1## wherein Ar is ##STR2## and R.sup.1 and R.sup.2 are the same or different and are each C.sub.1-8 alkyl, C.sub.3-6 cycloalkyl, benzyl which is unsubstituted or substituted with halogen, C.sub.1-3 alkyl or C.sub.1-3 alkoxy, phenyl which is unsubstituted or substituted with halogen, C.sub.1-3 alkyl or C.sub.1-3 alkoxy, --X--COOR.sup.3 or --Y--CN (in which X and Y are each straight-chain or branched-chain alkylene and R.sup.3 is C.sub.1-8 alkyl or C.sub.3-6 cycloalkyl), R.sup.1 and R.sup.2, when taken together, represent a 5- or 6-membered heterocyclic ring which may contain a sulphur or oxygen atom, the process comprising bringing a solution of the unreacted carbamate-containing aminosulfenylcarbamate derivative of the formula (I) in a water-insoluble organic solvent into contact with an aqueous alkali solution or a mixture of alkali, water and a water-soluble organic solvent.

Abstract: A novel S-methyl N-[{N-methyl-N-(N,N-disubstituted aminosulfenyl)carbamoyl}oxy]thioacetamidate derivative represented by the formula (I): ##STR1## which has insecticidal, miticidal or nematocidal activity comparable to or higher than known methomyl but which is quite low in toxicity to warm-blooded animals as compared to methomyl, is disclosed. An insecticidal, miticidal or nematocidal composition containing the same, and a process for preparing the same are also disclosed. A method for controlling noxious insects, mites or nematodes by using the same is further disclosed.

Abstract: This invention relates to carbamate derivatives represented by the formula (I): ##STR1## a process for preparing the derivatives and insecticides containing the derivatives.

Abstract: A pyran derivative represented by the formula ##STR1## wherein R.sub.1 and R.sub.4 are each the same or different alkyl having 1 to 6 carbon atoms, R.sub.2 and R.sub.3, when attached to a nitrogen atom, forms a saturated hetrocyclic ring which has as a hetero atom a nitrogen atom is addition to the nitrogen atom attached to R.sub.2 and R.sub.3, or oxygen atom, and an acid addition salt thereof. The compounds have antibacterial and insecticidal action.

Abstract: 2,2'-BIS(3,4-Epoxy-5-oxotetrahydropyran)ethers represented by the formula ##STR1## wherein R is hydrogen atom or straight-chain or branched-chain alkyl having 1 to 6 carbon atoms; a process for preparing the same.