Abstract: A fumigant composition comprising a pressurized mixture of a diluent gas and phosphine in predetermined proportions within a container adapted for release of gaseous fumigant. A method of preparing the composition comprises the steps of pumping a predetermined quantity of phosphine under pressure into the container and filling the container with a liquified diluent gas. A method of fumigating a substantially closed space by liberating the composition is also disclosed.

Abstract: A method of automatically mixing predetermined quantities of liquid organic compound and liquid propellant is disclosed. A metering cylinder is filled from a storage reservoir of a liquid organic compound and then disconnected from the reservoir. Then one end of the metering cylinder is connected to a source of liquid propellant, the other end is connected to a mixing vessel, and vapour pressure of the liquid propellant is utilized to force all of the liquid organic compound into the mixing vessel, together with a predetermined volume of liquid propellant.