Diffusers for thermal weeders, thermal weeders having diffusers andmanufacture ofthermal weeders having diffusers. The diffuser 2 may be for a thermal weeder 1which is capable of producing a jet of hot air along an axis 3, andcharacterized inthat the diffuser comprises at least one deflector 6 arranged across the hotair jetaxis, so as to deflect hot air radially. The diffuser 2 may be for a thermalweeder 1,comprising a hollow body 8 substantially closed to the exclusion of a firstopening 4adapted to allow an air inlet from the weeder 1 to inside the diffuser 2, asecondopening 5 capable of allowing the diffuser 2 to be applied to an area to betreated anda third opening able to allow egress of air to the outside of the diffuser 2,andcharacterized in that the diffuser further comprises a limiting means capableoflimiting the cooling of the air.
