Abstract: An apparatus suitable for controlling vegetation which apparatus comprises a hot-liquid reservoir (28), release means (38) connected to the hot-liquid reservoir (28) and at least one nozzle (74), for applying a stream of foam that contains steam, connected to the reservoir through the release means. The apparatus includes a heating means (34) to keep the liquid hot so the pressure is above atmospheric pressure. The liquid may be pumped by a pump (36) through the hot-water reservoir (28), the water being heated on demand by heaters (34) within the reservoir (28). The apparatus is either propelled by or mounted on a vehicle; and during use of the apparatus to control vegetation the vehicle provides power (24) to the heating means.

Abstract: An apparatus suitable for controlling unwanted vegetation which apparatus comprises a reservoir (2), release means (6) connected to the reservoir (2), and a nozzle (10) for applying a stream of foam including steam, connected to the reservoir (2) through the release means (6). A liquid is heated in the reservoir (2) to an elevated pressure, the liquid comprising water and a surfactant, i.e. a foaming agent, and forms a foam when discharged through the nozzle (10). The foam contains steam, and is effective at killing the foliage.

Abstract: An apparatus suitable for controlling vegetation which apparatus comprises a hot-liquid reservoir (28), release means (38) connected to the hot-liquid reservoir (28) and at least one nozzle (74), for applying a stream of foam that contains steam, connected to the reservoir through the release means. The apparatus includes a heating means (34) to keep the liquid hot so the pressure is above atmospheric pressure. The liquid may be pumped by a pump (36) through the hot-water reservoir (28), the water being heated on demand by heaters (34) within the reservoir (28). The apparatus is either propelled by or mounted on a vehicle; and during use of the apparatus to control vegetation the vehicle provides power (24) to the heating means.