A system for mowing grass, weeds or the like on an area of interest (S), comprising: - a vehicle (V) susceptible to move on said area of interest (S) along a forwarding direction (d); - at least one apparatus for mowing grass, weeds or the like on an area of interest (S); wherein the apparatus comprises: - at least one first feed line of a first working fluid ( F1 ) including at least one high pressure pump (P) for pumping the first working fluid ( F1 ) at a pressure of at least 250 bar; - at least one first spraying device of the first working fluid ( F1 ) towards the area of interest (S), said at least one first spraying device including at least one first high-pressure spraying nozzle fluidically connected with the at least one first feed line ; said at least one first spraying device being mounted on the vehicle (V); wherein said at least one first nozzle is movably mounted on said at least one first spraying device to rotate in a plane ( π ) or to oscillate along the same plane ( π ), said at least one first spraying nozzle being further mounted on said at least one first spraying device for spraying a jet of the first working fluid ( F1 ) along a direction which is substantially parallel to or lying on said plane ( π ), or a direction which is inclined with respect to the same plane ( π ), in such a manner to transversely hit the grass, weeds or the like, thus cutting the latter; characterized in that the system further comprises at least one second feed line for a second working fluid (F2), at least one second spraying device , the latter being mounted on the vehicle (V), said at least one second feed line comprising heating means to heat the working fluid (F2) at a temperature of at least 100 °C, said at least one second spraying device comprising at least one second nebulizer nozzle fluidically connected with said second feed line , said at least one second nebulizer spraying nozzle being mounted on said at least one second spraying device for spraying the hot nebulized second working fluid (F2) toward the area of interest (S) so as to inhibit the regrowth of the grass; wherein said at least one first spraying device and at least one second spraying device are mounted on said vehicle (V) in a spatial relationship such as upon the move along the forwarding direction (d) of the vehicle (V) acts on the area of interest (S) at first the first working fluid ( F1 ) flowing from said at least one first spraying device to cut the grass, weeds or the like and then the hot nebulized second working fluid (F2) flowing from said at least one second spraying device to inhibit its regrowth. - a vehicle (V) susceptible to move on said area of interest (S) along a forwarding direction (d); - at least one apparatus for mowing grass, weeds or the like on an area of interest (S); - at least one first feed line of a first working fluid ( F1 ) including at least one high pressure pump (P) for pumping the first working fluid ( F1 ) at a pressure of at least 250 bar; - at least one first spraying device of the first working fluid ( F1 ) towards the area of interest (S), said at least one first spraying device including at least one first high-pressure spraying nozzle fluidically connected with the at least one first feed line ; said at least one first spraying device being mounted on the vehicle (V); <EOS>