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    • 4. 发明公开
    • COMPOSITION FOR CONTROLLING FOREST PATHOGENS ON TREE STUMPS
    • EP3785525A1
    • 2021-03-03
    • EP20202174.7
    • 2019-02-15
    • Envion OYDanstar Ferment AG
    • ESKOLA, LauriSEISKARI, Pekka
    • A01G23/099A01N25/08A01N25/12
    • The invention relate to spreading device (1) adapted to be administer onto a tree stump (T) a composition which comprises microbial propagules to control or prevent the growth of a forest pathogen. The invention also relate to a method for controlling or preventing the growth of a forest pathogen. The spreading device comprises: a spreading end (3) connected to a pipe-like frame (2), and administering means (4) for administering said composition, wherein said administering means (4) comprise a pressure accumulator (42) for loading pressurized air (I). Said pressure accumulator (42) is connected to a first end of the pipe-like frame (2) via a supply pipe (413) and regulating means (41) which comprises at least one regulating valve (411) for regulating flow of the pressurized air (I) entering the frame (2) which regulating means (41) further comprises communication means (47) for providing to at least one regulating valve (411) data about starting time of pressurized air (I) delivery and data about duration of said pressurized air (I) delivery, wherein said pressure of delivered pressurized air depends on the diameter of the tree stump. Administering means (4) further comprises
      - a powder storage (45) which contains a powder-like mixture (S, K) comprising microbial propagule (S) and a solid fine carrier (K), which powder storage (45) is configured to be capable of being brought into a flow connection of the powder-like mixture with the frame (2), and
      - a control apparatus (43) connected to a second end of the frame (2) for administering the powder-like mixture (S, K) inside the frame (2) and means for blowing the powder-like mixture (S, K) onto a tree stump, via a spreading head (3) connected to the frame (2).