US2345903A - Synergists to aerosol insecticides - Google Patents

Synergists to aerosol insecticides Download PDF

Info

Publication number
US2345903A
US2345903A US517370A US51737044A US2345903A US 2345903 A US2345903 A US 2345903A US 517370 A US517370 A US 517370A US 51737044 A US51737044 A US 51737044A US 2345903 A US2345903 A US 2345903A
Authority
US
United States
Prior art keywords
synergists
aerosol
synergist
insecticide
kill
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US517370A
Inventor
William N Sullivan
Lyle D Goodhue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Aeronautics and Space Administration NASA
US Department of Agriculture USDA
Original Assignee
National Aeronautics and Space Administration NASA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US412960A external-priority patent/US2345891A/en
Application filed by National Aeronautics and Space Administration NASA filed Critical National Aeronautics and Space Administration NASA
Priority to US517370A priority Critical patent/US2345903A/en
Application granted granted Critical
Publication of US2345903A publication Critical patent/US2345903A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N45/00—Biocides, pest repellants or attractants, or plant growth regulators, containing compounds having three or more carbocyclic rings condensed among themselves, at least one ring not being a six-membered ring
    • A01N45/02—Biocides, pest repellants or attractants, or plant growth regulators, containing compounds having three or more carbocyclic rings condensed among themselves, at least one ring not being a six-membered ring having three carbocyclic rings
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
    • A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
    • A01N25/06—Aerosols
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/30—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests characterised by the surfactants
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N29/00—Biocides, pest repellants or attractants, or plant growth regulators containing halogenated hydrocarbons
    • A01N29/04—Halogen directly attached to a carbocyclic ring system
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N31/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic oxygen or sulfur compounds
    • A01N31/08—Oxygen or sulfur directly attached to an aromatic ring system
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A01N37/02—Saturated carboxylic acids or thio analogues thereof; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A01N37/06—Unsaturated carboxylic acids or thio analogues thereof; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A01N37/36—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids
    • A01N37/38—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids having at least one oxygen or sulfur atom attached to an aromatic ring system
    • A01N37/40—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids having at least one oxygen or sulfur atom attached to an aromatic ring system having at least one carboxylic group or a thio analogue, or a derivative thereof, and one oxygen or sulfur atom attached to the same aromatic ring system
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N41/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom
    • A01N41/02—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom containing a sulfur-to-oxygen double bond
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
    • A01N43/04—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom
    • A01N43/14—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom six-membered rings
    • A01N43/16—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom six-membered rings with oxygen as the ring hetero atom
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
    • A01N43/36—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom five-membered rings
    • A01N43/38—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom five-membered rings condensed with carbocyclic rings

Definitions

  • Our invention relates to materials which will increase the effectiveness of insecticides in aerosol form.
  • synergism Certain agents which may or may not be toxic in themselves when added to aerosol insecticides greatly increase the rate of mortality.
  • the increased toxicity obtained by the combination of such materials is often referred to as synergism" and the added material a synergist. Therefore, in these terms, the general object of our invention is the provision of materials suitab as synergists for aerosol insecticides.
  • Another object of our invention is the provision of agents which will not only increase the insecticidal action of materials known to possess some toxicity, but which will also impartinsecticidal properties to materials which are known to be non-toxic or to have a very low toxicity.
  • a further object of our invention is the provision of such agents acting as synergists, which can be applied by dispersion simultaneously with and by the same methods used for the preparation of aerosol insecticides.
  • materials suitable for the purposes of this invention belong most frequently to the class of chemical compounds which are surface active in non-aqueous solvents or which act as detergents in non-aqueous solvents.
  • These compounds in general, contain polar groupings such as the hydroxyl, the carboxyl, the amine, the ammonium, or the sulfonic acid, alone, in multiple, or in combination, which is attached to some long chain aliphatic radical. or, in some cases, an aromatic radical.
  • Substances acting as detergents or Surface active agents in non-aqueous media can be easily applied by the usual methods of aerosol production, but this invention is not limited to these substances becaus difierent methods of aerosol production can be used with different types of synergists.
  • this class of chemical compounds we have found the fatty acids, the mono'esters of fatty acids and ethylene or propylene glycol, of glycerine 0r sorbitol, to be especially suitable as well as fatty acids in combination with amines such as methanolamine, sulfonated aryl and alkyl radicals alone or combined with an amine.
  • a synergist to an insecticide in aerosol form is not necessarily also a synergist to an insecticide in spray form, even of the same compound.
  • Actual tests have disclosed that an agent which possesses little or no effect as a synergist to an insecticidal spray may be extremely effective as a synergist to an insecticidal aerosol. The rea son for this it not apparent, but it would seem that the mere wetting of the insect cannot explain the action.
  • An insecticide in aerosol form comprising thiocresol and an agent chosen from the group consisting of diglycol laurate, propylene glycol oleate, propylene glycol laurate, sorbitol laurate, and monoglycol laurate.
  • An insecticide in aerosol form comprising thiocresol and lauryl sulfate.
  • An insecticide in aerosol form comprising thiocresol and sulfonated naphthalene.

Description

Patented Apr. 4, 1944 UNITED STATES PATENT OFFICE SYNER-GISTS T AEROSOL INSECTICIDES William N. Sullivan, Washington, D. C., and Lyle D. Goodhue, Bcrwyn, Md., assignors to the United States oi America as represented by Claude R. Wickard, Secretary of Agriculture, and his successors in office No Drawing. Original app ication September 30,
1941, Serial No. 412,960.
Divided and this application January 7, 1944, Serial No. 517,370
(Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) 3 Claims.
States of America for governmental purposes without the payment to us of any royalty thereon.
This is a division of our copending application for patent, Serial No. 412,960, filed September 30, 1941.
Our invention relates to materials which will increase the effectiveness of insecticides in aerosol form.
Certain agents which may or may not be toxic in themselves when added to aerosol insecticides greatly increase the rate of mortality. The increased toxicity obtained by the combination of such materials is often referred to as synergism" and the added material a synergist. Therefore, in these terms, the general object of our invention is the provision of materials suitab as synergists for aerosol insecticides.
Another object of our invention is the provision of agents which will not only increase the insecticidal action of materials known to possess some toxicity, but which will also impartinsecticidal properties to materials which are known to be non-toxic or to have a very low toxicity.
A further object of our invention is the provision of such agents acting as synergists, which can be applied by dispersion simultaneously with and by the same methods used for the preparation of aerosol insecticides.
We have found that materials suitable for the purposes of this invention belong most frequently to the class of chemical compounds which are surface active in non-aqueous solvents or which act as detergents in non-aqueous solvents. These compounds, in general, contain polar groupings such as the hydroxyl, the carboxyl, the amine, the ammonium, or the sulfonic acid, alone, in multiple, or in combination, which is attached to some long chain aliphatic radical. or, in some cases, an aromatic radical.
Substances acting as detergents or Surface active agents in non-aqueous media can be easily applied by the usual methods of aerosol production, but this invention is not limited to these substances becaus difierent methods of aerosol production can be used with different types of synergists. In this class of chemical compounds we have found the fatty acids, the mono'esters of fatty acids and ethylene or propylene glycol, of glycerine 0r sorbitol, to be especially suitable as well as fatty acids in combination with amines such as methanolamine, sulfonated aryl and alkyl radicals alone or combined with an amine.
There are manyprocesses which can be used to apply these materials in the form of aerosols, such as spraying into the atmosphere, vaporization, by chemical reaction, by spraying on a heated surface, and so forth. Although this invention is not limited to any particular method of application, our preferred method of application comprises dissolving the synergist in the insecticide, if the insecticide is a liquid, or dissolving in some solvent common to both if a solid, and spraying the solution on a heated surface, whereby an aerosol is formed composed of both the synergist and the insecticide.
A synergist to an insecticide in aerosol form is not necessarily also a synergist to an insecticide in spray form, even of the same compound. Actual tests have disclosed that an agent which possesses little or no effect as a synergist to an insecticidal spray may be extremely effective as a synergist to an insecticidal aerosol. The rea son for this it not apparent, but it would seem that the mere wetting of the insect cannot explain the action.
The following results were obtained using synergists in accordance with this invention. These results were obtained on the basis of preliminary tests first carried out in a small chamber of 7 cu. ft. and then on a larger scale in a 216 cu. ft. chamber. In each test from 500 to 600 flies were used. Six-tenths of a pound of odichlorobenzene per 1000 cu. ft. gave only a 2% kill. However, when mixed with 0.16 lb. of oleic acid as a synergist, a kill was obtained. This same quantity of oleic acid, when used alone under the same conditions gave only a 1% kill. Lauric acid when used alone in the same amount, namely, 0.16 lb. per 1000 cu. it, gave only a 1% kill, but when used as a synergist with 0.6 lb. of o-dichlorobenzene per 1000 cu. ft. a kill was obtained.
The same synergists were tested at other concentrations and it was found that little is gained by adding more than The following is a list of substances which were tested as synergists at a concentration of 0.06 lb. in 0.6 lb. of o-dichlorobenzene per 1000 cu. it. against the housefly, the percentage of kill in each case being indicated in the right hand column:
Per cent kill Spermaceti 3'7 Diglycol laurate 48 Sulfonated naphthalene 60 Salicylic acid 91 Propylene glycol oleate 28 Myristic acid 49 Propylene glycol laurate '74 Sorbitol laurate 59 v Monoglycol laurate 56 Triethanolamine oleate 56 Lauryl sulfate '10 oleic acid was effective, lauric acid was also found to be effective and vice versa. The kill without a synergist was always less than 100% and usually less than 50%.
In a 1100 cu. ft. room, naturally infested with cockroaches, more than 5000 were killed in 18 hours and none were found living, using 1 lbs. of o-dichlorobenzene with 3% lauric acid and 2% oleic acid. Excellent results were also obtained in a 3200 cu. ft. room.
Tests were also conducted against the carpet beetle larva, the confused flour beetles and crickets. The halogenated esters in combination with any one of the synergists mentioned above are extremely toxic to the confused flour beetle and produce a high mortality to the carpet beetle larva.
Among compounds tested against the housefly in the form of aerosols, in combination with synergists of the type mentioned above, are 3- chloroacenaphthene, 2-chlorofluorene, 3-chlorodibenzofuran, chlorinated diphenyls, halogenated naphthalenes, halogenated esters, halogenated ketones, carbazole, thiocresol and halogenated phenols. The synergist was shown to be responsible in each case for an increase in toxicity.
Having thus described our claim:
1. An insecticide in aerosol form comprising thiocresol and an agent chosen from the group consisting of diglycol laurate, propylene glycol oleate, propylene glycol laurate, sorbitol laurate, and monoglycol laurate.
2. An insecticide in aerosol form comprising thiocresol and lauryl sulfate.
3. An insecticide in aerosol form comprising thiocresol and sulfonated naphthalene.
invention, we
WILLIAM N. SULLIVAN. LYLE D. GOODHUE.
US517370A 1941-09-30 1944-01-07 Synergists to aerosol insecticides Expired - Lifetime US2345903A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US517370A US2345903A (en) 1941-09-30 1944-01-07 Synergists to aerosol insecticides

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US412960A US2345891A (en) 1941-09-30 1941-09-30 Synergists to aerosol insecticides
US517370A US2345903A (en) 1941-09-30 1944-01-07 Synergists to aerosol insecticides

Publications (1)

Publication Number Publication Date
US2345903A true US2345903A (en) 1944-04-04

Family

ID=27021994

Family Applications (1)

Application Number Title Priority Date Filing Date
US517370A Expired - Lifetime US2345903A (en) 1941-09-30 1944-01-07 Synergists to aerosol insecticides

Country Status (1)

Country Link
US (1) US2345903A (en)

Similar Documents

Publication Publication Date Title
US2394916A (en) Methods and compositions for killing weeds
US3683078A (en) Transparent toxicant compositions
US3119736A (en) Halo-nitroaniline fungicides
US2362128A (en) Insecticide
US3189428A (en) Method for inhibiting plant growth
US2345891A (en) Synergists to aerosol insecticides
HU184676B (en) Pesticide preparation containing organic phosphorus compound and pyretroide derivative
US2345903A (en) Synergists to aerosol insecticides
US3373011A (en) Composition and method for suppressing plant growth
US2345895A (en) Synergists to aerosol insecticides
US2345905A (en) Synergists to aerosol insecticides
US2345894A (en) Synergists to aerosol insecticides
US2345892A (en) Synergists to aerosol insecticides
US2345900A (en) Synergists to aerosol insecticides
US2345908A (en) Synergists to aerosol insecticides
US2345907A (en) Synergists to aerosol insecticides
US2345899A (en) Synergists to aerosol insecticides
US2345896A (en) Synergists to aerosol insecticides
US2345904A (en) Synergists to aerosol insecticides
US2345901A (en) Synergists to aerosol insecticides
US2345893A (en) Synergists to aerosol insecticides
US2345902A (en) Synergists to aerosol insecticides
US2345897A (en) Synergists to aerosol insecticides
US3927207A (en) Method for combating insects employing certain ketones
US2345898A (en) Synergists to aerosol insecticides