Rhizosphere-competent trichoderma strains

摘要

A rhizosphere-competent Trichoderma polysporum, (ATCC 20852) and a rhizosphere-competent Trichoderma viride (ATCC 20853) are described. They are respectively, mutants of rhizosphere-incompetent Trichoderma polysporum ATCC 20475 and rhizosphere-incompetent Trichoderma viride ATCC 20476. The rhixosphere-competent strains are particularly effective biocontrol agents for plant and/or tree diseases associated with various fungi e.g., Pythium spp., Sclerotium, spp., Rhizoctonia solani and basidiomycetes such as Chondrostereumm purpureum.