Production of disease suppressive compost and microorganism culture for use therein
AssigneeThe Ohio State University
InventorHarry A. J. Hoitink
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Abstract
Compost is rendered suppressive to plant pathogens, such as Rhizoctonia solani, Pythium ultimum and Fusarium, and/or diseases caused thereby by adding to the compost, desirably after peak heating has been achieved but before substantial recolonization of the compost by mesophilic microorganisms has occurred, one or more microorganisms antagonistic to the plant pathogen. Desirably the inoculated antagonistic microoganisms comprise Trichoderma hamatum species A.T.C.C. No. 20765 or 20764, together with a Pseudomonas maltophilia bacterium species A.T.C.C. No. 53199 or a Flavobacterium species, A.T.C.C. No. 53198.
Claims18
A biologically pure culture for inducing suppression of plant pathogens and/or diseases caused thereby in a compost, said culture consisting essentially of at least one Trichoderma fungus selected from the group consisting of Trichoderma hamatum isolate 382, A.T.C.C. No. 20765 and T. hamatum isolate 559, A.T.C.C. No. 20764, and at least one bacterium selected from the group consisting of Pseudomonas maltophilia sp. isolate 76, A.T.C.C. No. 53199 and Flavobacterium sp. isolate 299, A.T.C.C. No. 53198.
A method for producing a compost which is suppressive to at least Rhizoctonia solani and Pythium ultimum and/or diseases caused thereby, which method comprises inoculating into said compost at least one Trichoderma fungus selected from the group consisting of Trichoderma hamatum isolate 382, A.T.C.C. No. 20765 and T. hamatum isolate 559, A.T.C.C. No. 20764, and at least one baterium selected from the group consisting of Pseudomonas maltophilia sp. isolate 76, A.T.C.C. No. 53199 and Flavobacterium sp. isolate 299, A.T.C.C. No. 53198.
A method for producing a compost which is suppressive to a plant pathogen and/or disease caused thereby, which method comprises inoculating into said compost, after peak heating has been achieved but before substantial recolonization of said compost by mesophilic microorganism has occurred, a microorganism culture combination consisting essentially of at least one fungus antagonistic to Rhizoctonia solani and suppressive to plant disease caused thereby and at least one bacterium antagonistic to Pythium ultimum and suppressive to plant disease caused thereby with innoculating by at least 100 colony forming units each of said fungus and of said bacterium for each gram of the compost, based on dry weight of the compost.
A biologically pure culture consisting essentially of any one or more of the following microorganisms:
- Trichoderma hamatum isolate 382, A.T.C.C. No. 20765;
- Trichoderma hamatum isolate 559, A.T.C.C. No. 20764;
- Pseudomonas maltophilia sp. isolate 76, A.T.C.C. No. 53199;
- and
- Flavobacterium sp. isolate 299, A.T.C.C. No. 53198.
Dependencies are inferred from the claim text.