Abstract: Described is an anti-termite material intended for preventive protection of structures against the invasion of subterranean termites. The material of the invention is in the form of a woven material constituted of textile fibers known for their tenacity. The woven mesh is dimensionally stabilized by any suitable method. To render the material impassible by subterranean termites, the threads constituting the mesh are coated with an abrasive powder securely affixed with an adhesive, a polymerisable mastic, or a resin. This coating of threads by an abrasive powder renders contact with them harmful to subterranean termites. To avoid injury, the target insects will turn away from the material through which they will not pass.

Abstract: A method protecting building structures against termites comprising over the entire erection surface exposed by digging erection of the structure a non-porous film of plastic material impregnated throughout the film with a low concentration of an insecticide whereby the insecticide slowly diffuses.

Abstract: A method and device are disclosed for calibrating a regulated flow spraying apparatus of the type including a source of spraying fluid under pressure, and spray nozzles, the flow rate of the spray nozzles being regulated by varying the pressure of the liquid delivered thereto, the regulation being controlled as a function of at least one external parameter and a calibration parameter. Fluid from the source is conveyed to a calibration circuit comprising a flow rate sensor and at least one calibration nozzle. The flow rate and the pressure of the fluid are measured in the claibration circuit. The calibration parameter is calculated from the measured values of the flow rate and pressure.