Abstract: Heat-stable composition, destined to emit insecticidal vapors by being heated, which contains at least one insecticidal substance of the family of pyrethrinoids, a stabilizer chosen from among the compounds defined by the chemical formula ##STR1## in which R represents one or two optional alkyl radicals containing one to twelve carbon atoms, R' and R", alike or different, represent each an alkyl radical containing one to eighteen carbon atoms, R' and R" together can represent a divalent saturated hydrocarbon group containing two to seven carbon atoms, and R'" represents a hydrogen atom or an alkyl radical containing one to seven carbon atoms; and, optionally, an adjuvant inert to the insecticide and chosen from among diluents, thickening agents, perfumes, synergists, colorants, repellants, solid supports and comburants.

Abstract: Device which is intended for dispensing insecticide vapors and which can be used in or on a heating apparatus, the said device consisting of several different juxtaposed solid compositions each containing a substance with an action against insects, which is absorbed in an absorptive bulk material, the said active substance being chosen, in at least one of the compositions, from the group comprising the pyrethrinoids and the isopyrethrinoids.

Abstract: A process for the preparation of a straight-chain or branched alkene which has 20 to 24 carbon atoms and in which the ethylenic bond is located after a carbon atom numbered between 8 and 11, which process comprises reacting, in an anhydrous solvent, preferably in an oxahydrocarbon an organometallic copper compound with an alkyl or alkenylsulfonate.

Abstract: A composition which can be used as a bait for anthropophilic flies, containing a synergistic mixture of at least one alkene having 19 to 24 carbon atoms, in which the ethylenic bond is located after a carbon atom in the range between the 7-position and the 11-position, and at least one aminoacid source selected from the group comprising the biochemical class of protides.

Abstract: An insecticidal composition which contains a combination A of O,O-dimethyl S-[1,2-bis-(ethoxycarbonyl)-ethyl] dithiophosphate with at least one of the insecticides defined under (a) and (a') below:(a) O,O-dimethyl S-(4-aza-6-chloro-2-oxo-benzoxazol-3-yl)-methyl thiophosphate, and(a') an ortho-substituted phenyl N-methylcarbamate having the following formula: ##STR1## in which R is an alkyl radical containing 1 to 5 carbon atoms, a propargyloxy radical, a dialkoxymethyl radical in which the alkoxy group contains 1 to 4 carbon atoms, a dioxolanyl radical or a dioxanyl radical, these two latter radicals being unsubstituted or substituted by 1 or 2 methyl groups, and R' is a hydrogen atom, or R and R', together with the two carbon atoms of the benzene ring to which they are attached, form a thiophene ring, a dioxolane ring or dihydrofurane ring, these rings being unsubstituted or substituted by one or two methyl groups.

Abstract: Insecticidal compositions in the form of a homogeneous liquid organic solution comprising as essential components:A. from about 0.01 to 10% by weight, based on the weight of the composition of an insecticidal ortho-substituted phenyl N-methyl carbamate;B. from about 0.01 to 10% by weight, based on the total weight of the composition of a liquid non-volatile to low-volatile organic diluent which has a weak solvent power for the active substance A andC. from about 25 to 99% by weight, based on the total weight of said composition of a liquid volatile organic solvent for the active substance A andD. from 0 to about 75% by weight, based on the total weight of said composition of a liquid moderately volatile to volatile organic diluent which has a weak solvent power for the active substance A.

Abstract: Insecticide evaporator comprising at least one volatile phosphoric ester insecticide, an agent for stabilizing the said ester against decomposition by protonization and used in an amount of 0.2 to 20% based on the weight of phosphoric ester, characterized in that the stabilizing agent contains at least one compound selected from the compounds of the chemical class of 1,3-benzodioxoles and at least one diazene.

Abstract: A device destined for the emission of vapors of an active substance, in particular an insecticidal substance, is described which comprises, in a rigid assembly,A. a reservoir containing the active substance and having an evaporation surface for the emission of the active vapors, said reservoir comprisingI. a system of two plates of a porous or fibrous material, one of the large faces of one of the plates facing one of the large faces of the other, and a frame for the plates which separates the space between the two plates from the exterior while leaving entirely or partially free at least one of the two large external faces of the two plates, which can thus serve as an evaporation surface, andIi. an insecticidal organo-phosphorus substance having a vapor pressure, at 25.degree. C, of between 5 .times. 10.sup.-.sup.5 and 5 .times. 10.sup.-.sup.3 mbar, with or without addition of a pyrethrinoid insecticidal compound having a vapor pressure, at 25.degree. C, of between 1 .times. 10.sup.-.sup.6 and 2 .times. 10.

Abstract: A device intended to emit vapors emitted by an active substance, in particular an insecticidal substance, which comprises, in a rigid assemblyA. a reservoir intended to contain the active substance and having an evaporation surface for the emission of the active vapors,B. an electrical resistance associated with the said reservoir in such a way as to heat at least the part of the said reservoir which comprises, or is close to, the said evaporation surface, andC. a system for connecting the resistance to a source of electric current: the said reservoir comprisesI. a system of two plates of a porous or fibrous material, one of the large faces of one of the plates facing one of the large faces of the other, and a frame for the plates, which separates the space between the two plates from the exterior while leaving entirely or partially free at least one of the two large external faces of the two plates, which can thus serve as an evaporation surface, andIi.

Abstract: Granular products for the treatment of soil are described which comprises a central solid nucleus containing fertilizer, herbicide, or a mixture of fertilizer and herbicide, all soluble in water without decomposition, as well as, about each product a coating consisting of solid materials at least 40% of which are soluble in water without decomposition, and at least 15% of which consist of active material different from that of the nucleus, and a polymeric resin the amount of which does not exceed 10% of the total weight of the coating. Comparative tests are described which show that these novel granular products can be as readily dissolved in the soil as uncoated fertilizer granules.

Abstract: Pesticidal composition comprising: a pesticidal, phosphoric ester the molecule of which has at least one alkyl group of 1 to 3 carbon atoms, 0.05 to 10% of an agent stabilizing the said ester against decomposition by protonisation, together with adjuvants characterized in that the stabilizing agent comprises at least one sulphur compound containing per molecule at least one divalent sulphur atom of which one valence is bonded to an atom chosen from sulphur, carbon, nitrogen, hydrogen, and metals capable of giving a salt, the other valence being bonded to an atom chosen from hydrogen, the carbon atom already noted, a second carbon atom, the nitrogen atom already noted, a second nitrogen atom, the metal atom already noted in the case of a metal of valence greater than one, a second atom of metal and oxygen when the first valence is not attached to an atom of hydrogen, the proportion of sulphur calculated with reference to the weight of the sulphur compound being between 5 and 99%.

Abstract: An evaporator system adapted for emitting insect killing vapors of an insecticide therefrom and comprising a liquid or solid composition enclosed therein, said insecticide consisting in at least one volatile phosphoric acid ester which is stabilized by at least one diazene compound.

Abstract: Insecticide evaporator comprising at least one volatile phosphoric ester insecticide, an agent for stabilising the said ester against decomposition by protonisation and used in an amount of 0.2 to 10 % based on the weight of phosphoric ester, characterised in that the stabilising agent contains at least one compound selected from the compounds of the chemical class of 1,3-benzodioxoles and the balance of said stabilising agent being selected from elemental sulphur, a compound of divalent sulphur, a diazene and an epoxidized compound.