# US 5,242,907 A · Pesticidal control > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,242,907 A - Document ID: US5242907A - Status: Granted - Kind: A - Application number: 07/668,500 - Filed: 1991-04-29 - Granted: 1993-09-07 - Earliest claimed: 1988-09-30 - Assignees: NC Development, Inc. - Inventors: Howard B. Dawson - Web page: https://patentgrep.com/patent/US5242907A ## CPC - A01N 25/04: Dispersions, {emulsions, suspoemulsions, suspension concentrates} or gels (foams A01N25/16) - A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS ## Abstract Tropical and temperate crops, particularly rice, maize, cotton, soya and fruit, can be protected, particularly against insect pests of the orders Leoidoptera, Diptera, Coleoptera, Hemiptera, Orthoptera, Dictyoptera, Hymenoptera and Isoctera and acarine pests, by treatment with a pesticidal water-miscible formulation whose average particle size is at most 200 nm. Public health pests, including the house fly (Musca domestica), cockroach (Blatta sp. or Periplaneta sp.) and mosquito (Aedes aegyoti) as well as pests which infest or affect timber, particularly in buildings, can also be controlled with such formulations. The formulations include water, oil, a surfactant, and a cosurfactant, wherein either the oil is a pesticide or the formulation comprises a pesticide dissolved in the oil. The pesticide may be a pyrethroid such as cypermethrin or deltamethrin. The formulations can be molecular solutions, micellar solutions or microemulsions (water-in-oil or oil-in-water) and are generally clear. ## Claims ### Claim 1 A method of protecting tropical and temperate crops, other than cabbages and apples, the method comprising a step of treating the crops, or a locus for the crops, with a pesticidal water-miscible formulation having an average particle size of at most 200 nm, wherein said formulation comprises water, a pesticidal oil, a surfactant and a co-surfactant, wherein either the pesticidal oil is a pesticide or the pesticidal oil comprises a pesticide dissolved in oil, the co-surfactant comprising a nonionic surfactant having a hydrophile/lipophile of less than 10. ### Claim 2 (depends on 1) A method as claimed in claim 1, wherein the crop to be protected is rice, maize, cotton, soya or fruit other than apples. ### Claim 3 A method of controlling acarine pests and insect pests of the order Lepidoptera (other than Tortrix larvae and Pieris brassicae), Diptera, Coleoptera, Hemiptera (other than Bravicoryne brassica), Orthoptera, Dictyoptera, Hymenoptera and Isoptera, the method comprising a step of treating the pests, or a locus for the pests, with a pesticidal water-miscible formulation having an average particle size of at most 200 nm, wherein said formulation comprises water, a pesticidal oil, a surfactant and a co-surfactant, wherein either the pesticidal oil is a pesticide or the pesticidal oil comprises a pesticide dissolved in oil, the co-surfactant comprising a nonionic surfactant having a hydrophile/lipophile of less than 10. ### Claim 4 A method of controlling public health pests, the method comprising a step of treating the pests, or a locus for the pests, with a pesticidal water-miscible formulation having an average particle size of at most 200 nm, wherein said formulation comprises water, a pesticidal oil, a surfactant and a co-surfactant, wherein either the pesticidal oil is a pesticide or the pesticidal oil comprises a pesticide dissolved in oil, the co-surfactant comprising a nonionic surfactant having a hydrophile/lipophile of less than 10. ### Claim 5 (depends on 4) A method as claimed in claim 4, wherein the method is a method of controlling at least one pest selected from the group consisting of the house fly (Musca domestica), the cockroach (Blatta sp. and Periplaneat spp.) and the mosquito (Aedes aegypti). ### Claim 6 (depends on 1) A method as claimed in claim 1, wherein the pesticidal oil consists substantially only of a pesticide. ### Claim 7 (depends on 1) A method as claimed in claim 1, wherein the surfactant comprises an anionic surfactant. ### Claim 8 (depends on 1) A method as claimed in claim 1, wherein the cosurfactant comprises a nonionic surfactant or an aliphatic alcohol. ### Claim 9 (depends on 1) A method as claimed in claim 1, wherein the formulation comprises on a w/v basis: oil (20 to 50%), surfactant (1to 20%), cosurfactant (1 to 20%) and water (20 to 70%), provided that the total number of percentage parts of the ingredients cannot exceed 100. ### Claim 10 (depends on 1) A method as claimed in claim 1, wherein the formulation comprises on a w/v basis: oil (1 to 20%), surfactant (1 to 10%), cosurfactant (1 to 10%) and water (40 to 95%), provided that the total number of percentage parts of the ingedients cannot exceed 100. ### Claim 11 (depends on 3) A method as claimed in claim 3, wherein the surfactant comprises an anionic surfactant. ### Claim 12 (depends on 3) A method as claimed in claim 3, wherein the cosurfactant comprises a nonionic surfactant or an aliphatic alcohol. ### Claim 13 (depends on 3) A method as claimed in claim 3, wherein the formulation comprises on a w/v basis: oil (20 to 50%), surfactant (1 to 20%), cosurfactant (1 to 20%) and water (20 to 70%), provided that the total number of percentage parts of the ingredients cannot exceed 100. ### Claim 14 (depends on 3) A method as claimed in claim 3, wherein the formulation comprises on a w/v basis: oil (1 to 20%), surfactant (1 to 10%), cosurfactant (1 to 10%) and water (40 to 95%), provided that the total number of percentage parts of the ingredients cannot exceed 100. ### Claim 15 (depends on 4) A method as claimed in claim 4, wherein the surfactant comprises an anionic surfactant. ### Claim 16 (depends on 4) A method as claimed in claim 4, wherein the cosurfactant comprises a nonionic surfactant or an aliphatic alcohol. ### Claim 17 (depends on 4) A method as claimed in claim 4, wherein the formulation comprises on a w/v basis: oil (20 to 50%), surfactant (1 to 20%), cosurfactant (1 to 20%) and water (20 to 70%), provided that the total number of percentage parts of the ingredients cannot exceed 100. ### Claim 18 (depends on 4) A method as claimed in claim 4, wherein the formulation comprises on a w/v basis: oil (1 to 20%), surfactant (1 to 10%), cosurfactant (1 to 10%) and water (40 to 95%), provided that the total number of percentage parts of the ingredients cannot exceed 100. ### Claim 19 (depends on 1) A method as claimed in claim 1, wherein the pesticide is a pyrethroid. ### Claim 20 (depends on 3) A method as claimed in claim 3, wherein the pesticide is a pyrethroid. ### Claim 21 (depends on 4) A method as claimed in claim 4, wherein the pesticide is a pyrethroid. ### Claim 22 (depends on 1) A formulation as claimed in claim 1, wherein the formulation is a microemulsion. ### Claim 23 (depends on 3) A formulation as claimed in claim 3, wherein the formulation is a microemulsion. ### Claim 24 (depends on 4) A formulation as claimed in claim 4, wherein the formulation is a microemulsion. ### Claim 25 (depends on 1) A method as claimed in claim 1, wherein the cosurfactant comprises a nonionic surfactant. ### Claim 26 (depends on 3) A method as claimed in claim 3, wherein the cosurfactant comprises a nonionic surfactant. ### Claim 27 (depends on 4) A method as claimed in claim 4, wherein the cosurfactant comprises a nonionic surfactant. ### Claim 28 (depends on 1) A method as claimed in claim 1, wherein the cosurfactant is oil-soluble. ### Claim 29 (depends on 3) A method as claimed in claim 3, wherein the cosurfactant is oil-soluble. ### Claim 30 (depends on 4) A method as claimed in claim 4, wherein the cosurfactant is oil-soluble.