Abstract: The present invention relates to a device for the extermination of pests like e.g., worms and arthropods such as insects and wood-louses, mites, etc., wherein said device is provided with a nozzle arranged to distribute carbon dioxide in solid state to create an atmosphere comprising of carbon dioxide and wherein said nozzle is adapted to achieve a predetermined particle size and velocity of said carbon dioxide adapted for the geometry the pest is located into and wherein the particle size and the velocity are optimized for an effective extermination of the pest in question. The invention also relates to methods and compositions for use with said devices.

Abstract: Apparatus and a method for controlling vermin either directly or indirectly via objects giving shelter to the vermin. Cooling of the vermin is effected by providing dry snow particles by passing pressurized carbon dioxide through a nozzle directed at the vermin. Smaller and larger snow particle sizes are allocated within a selected range of sizes and velocities. Environmentally friendly and rapid control of the vermin is achieved, and an effectively functioning cooling system is provided, which, by the gradual supply of snow, executes cooling through different velocities and sizes of the snow particles. In a initial cooling phase small snow particles provide cooling by sublimating and giving off cold rapidly. Larger snow particles then penetrate through the gas barrier that is created by the sublimating small snow particles to maintain the cooling effect.

Abstract: The present invention relates to a device for the extermination of pests like e.g., worms and arthropods such as insects and wood-louses, mites, etc., wherein said device is provided with a nozzle arranged to distribute carbon dioxide in solid state to create an atmosphere comprising of carbon dioxide and wherein said nozzle is adapted to achieve a predetermined particle size and velocity of said carbon dioxide adapted for the geometry the pest is located into and wherein the particle size and the velocity are optimized for an effective extermination of the pest in question. The invention also relates to methods and compositions for use with said devices.

Abstract: Arrangement and application for executing control measures against vermin either directly or indirectly via objects giving shelter to the vermin, e.g. substrates of substances. The control measure is based on the rate of cooling the vermin, object, etc., with the help of dry snow particles to which smaller and larger sizes are allocated within a selected range of sizes and velocities are allocated within a selected range of velocities. The arrangement and the application arc associated with advantages in the sense that environmentally friendly and rapid control is achieved, and in that an effectively functioning cooling system is obtained, which, by the gradual supply of snow, executes cooling through different velocities and sizes of the snow particles. Rapid cooling of a defined target can be obtained in this way. In an initial phase the small snow particles contribute most to the cooling by sublimating and giving off cold rapidly.

Abstract: The invention relates to a method for bringing about the transformation of a medium such as carbon dioxide or other gases or mixtures thereof into snow. In accordance with the invention, the aforementioned medium and the snow produced from it are caused to interact with surfaces of a snow-producing nozzle extending from a discharge orifice for the medium. The aforementioned medium, after exiting from the discharge orifice, is either permitted to expand into an elongated space which exhibits a uniform cross section. Or the medium is also permitted to act against a number of obstructions in the form of flexible bristles situated along the flow path of the medium as it flows out between the discharge orifice for the medium and an outlet for the formed snow. The produced carbon dioxide snow is intended for use in small animal pest decontamination. Means for producing snow are included in the invention.