Abstract: Plant heat treatment assembly (100) for elimination of pathogens on living plants, comprising a process chamber (1) with inlet (3) and outlet (5), a pre-chamber (4) with pre-chamber inlet (7) and outlet (6). The pre-chamber outlet communicates with the process chamber inlet. A pump (9) is arranged between the process chamber outlet (5) and the pre-chamber inlet (7), circulating gas through the process chamber. A gas heating arrangement (19) has water steam supply. A choking arrangement (11) is between the pre-chamber and the process chamber. The plant heat treatment assembly (100) has a temperature sensor (45) and an adjustable steam supply valve (21) to govern the supply of water steam based on input from the temperature sensor (45). The choking arrangement (11) is adjustable. A method is also disclosed.

Abstract: Plant heat treatment assembly (100) for elimination of pathogens on living plants, comprising a process chamber (1) with inlet (3) and outlet (5), a pre-chamber (4) with pre-chamber inlet (7) and outlet (6). The pre-chamber outlet communicates with the process chamber inlet. A pump (9) is arranged between the process chamber outlet (5) and the pre-chamber inlet (7), circulating gas through the process chamber. A gas heating arrangement (19) has water steam supply. A choking arrangement (11) is between the pre-chamber and the process chamber. The plant heat treatment assembly (100) has a temperature sensor (45) and an adjustable steam supply valve (21) to govern the supply of water steam based on input from the temperature sensor (45). The choking arrangement (11) is adjustable. A method is also disclosed.