Abstract: Hexahydrotriazine compounds of the formula: 1

Abstract: A hexahydrotrazine compound which is 1-(2-chloro-5-pyridylmethyl)-3,5-dimethyl-2-nitroiminohexahydro-1,3,5-triazine or 1-(2-chloro-5-thiazolylmethyl)-3,5-dimethyl-2-nitroiminiohexahydro-1,3,5-triazine and insecticides containing the same.

Abstract: An insecticidal, acaricidal or nematocidal composition which comprises an organophosphorus compound represented by formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 each represents C.sub.1 to C.sub.4 alkyl; A represents H, C.sub.1 to C.sub.4 alkyl, C.sub.1 to C.sub.4 alkylthio or N(R.sup.4)R.sup.5 ; Z represents C(CN)R.sup.4 or N-R.sup.7 and an inert carrier show excellent effect for controlling harmful insects, mites and nematodes, do not give off a bad or irritating odor and exhibit very low toxicity to warm-blooded animals. R.sup.4, R.sup.5, R.sup.6, and R.sup.7 are defined in the specification.

Abstract: Insecticidal, acaricidal or nematocidal compositions which comprise a series of organophosphorus compounds represented by the compounds represented by the following structural formulae: ##STR1## show excellent effect for controlling harmful insects, mites and nematodes, do not give off a bad or irritating odor and exhibit very low toxicity to warm-blooded animals.

Abstract: Insecticidal, acaricidal or nematocidal compositions which comprise a series of organophosphorus compounds represented by the following representative structural formulae: ##STR1## show excellent effect for controlling harmful insects, mites and nematodes, do not give off a bad or irritating smell and exhibit very low toxicity to warm-blooded animals.

Abstract: Insecticidal, acaricidal or nematocidal compositions which comprise organophosphorus compounds of the formula ##STR1## wherein R.sup.1 and R.sup.2 each represents a C.sub.1 to C.sub.4 alkyl group;X represents NH or N--R.sup.4 wherein R.sup.4 represents an alkyl; an alkenyl; an alkynyl; a phosphoric acid ester radical; a cyano group; a group of formula (II): ##STR2## (wherein R.sup.5 represents an alkyl or alkylamino group); or a group of the formula: --(R.sup.6).sub.n --CO--R.sup.7 (wherein n is 0 or 1; R.sup.6 represents a methylene or an ethylene group; and R.sup.7 represents an alkyl, an alkoxy, an alkylthio group, an alkylamino group or a hydrogen atom);Z represents N--R.sup.8 (wherein R.sup.8 represents a nitro group, a cyano group, an alkylsulfonyl group, a tosyl group or an alkylcarbonyl group) or a group represented by the formula: C(CN)R.sup.9 (wherein R.sup.9 represents a cyano group or an alkoxycarbonyl group); andA represents an ethylene group which may be substituted with C.sub.1 to C.sub.

Abstract: Insecticides which are improved over the conventional insectides are provided by the use of a nitroguanidine compound represented by the following general formula (I): ##STR1## wherein R stands for hyydrogen or methyl; R.sup.1 and R.sup.2 are the same or different, and stand for hydrogen or methyl; and X stands for a group indicated by ##STR2## The insecticides provided by this invention are extremely active for controlling various harmful insects and yet are low in toxicity to warm-blooded animals, fishes and Crustacea, the remaining quantity thereof after their use is small, and they do not produce phytotoxicity in various plants.

Abstract: An insecticide having high insecticidal activities against various harmful insects, which is low in toxicity to warm-blooded animals and fishes to be used safely. The insecticide comprises a derivative of 2,3-dihydro-2,2-dimethylbenzofuran-7-yl N-(substituted sulfonylcarbamoyl)-N-methylcarbamate represented by the general formula: ##STR1## wherein X stands for a halogen atom; --NHR where R is an alkyl group, cycloalkyl group, lower alkenyl group, lower alkynyl group or ##STR2## (where Z is a hydrogen atom, halogen atom, alkyl group, alkoxy group or alkoxycarbonyl group), aralkyl group, a 5-member or 6-member heterocyclic group, or an alkoxy group.

Abstract: An organo phosphoric acid dithioester is produced by reacting either O-ethyl.S-normalpropyldithiophosphoric acid salt and substituted ethylmercaptoethyl halide or O-ethyl.S-normalpropylthiophosphoric acid halide and substituted ethylmercaptoethylmercaptans. Said organo phosphoric acid dithioester has excellent insecticidal activity against a wide variety of insects.