Spreading device, method and powder-like mixture composition for controlling or preventing forest pathogens on tree stumps
AssigneesEnvion, LLC, Danstar Ferment AG
InventorsLauri ESKOLA, Pekka SEISKARI
Life of this patent
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Abstract
A spreading device, a powder-like mixture composition and a method for spreading the composition for control or prevent forest pathogens on tree stumps are disclosed.
Claims43
A spreading device (1) adapted to administer onto a tree stump (T) a composition which comprises microbial propagules to control or prevent the growth of a forest pathogen, which 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) being 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 the 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 pressurized air depends on the diameter of the tree stump and which 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).
A composition in the form of a powder-like mixture (S, K), wherein said composition comprises microbial propagules and a solid fine carrier wherein said microbial propagules are fungal spores which control or prevent the growth of forest pathogens on a tree stump and wherein said solid fine carrier has a volumetric weight of at least 0.50 g/cm3, or at least 0.60 g/cm3, or at least 1 g/cm3.
A method for spreading or dispersing onto a tree stump a powder-like mixture comprising microbial propagules which control or prevent the growth of a forest pathogen and a solid fine carrier having a volumetric weight of at least 0.50 g/cm3, or at least 0.60 g/cm3 or at least 1 g/cm3, wherein said method comprises the following steps:
- receiving data about dosage of a powder-like mixture (S, K) by regulating means (41),
- dosing the powder-like mixture (S, K) to an amount which depends on the diameter of the tree stump,
- forming an aerosol (A) from pressurized gas and the powder-like mixture by delivering pressurized gas on adjusted rate and amount into the powder like-mixture (S, K),
- reading or dispersing the aerosol (A) onto a tree stump by means of pressurized gas flow,
- wherein said pressurized gas is preferably pressurized air (I).
The method according to 31, wherein said method comprises receiving control commands relating to starting time and pressure level of delivered pressurized air and/or dosage of the powder-like mixture from the harvester control system preferably from the control commands of harvester control system comprises control commands relating to working hydraulics of the harvester head which controls the usage of the chain saw or/and usage of tree stump treatment device for liquid.
Dependencies are inferred from the claim text.