In vitro inhibition of root-rot pathogensPhellinus weirii, Armillariella mellea, Fomes annosus, andPhytophthora cinnamomi by a newly isolatedBacillus sp.
A Gram-positive bacterium that inhibits several root-rot pathogens was isolated from alder forest soil on the Oregon coast. This organism, similar toBacillus cereus, produces in culture media a heat-stable, broad-spectrum antibiotic which inhibits growth of four important Northwest conifer root disease fungi:Phellinus weirii (Murr.) Gilbertson,Fomes annosus (Fr.) Cke.,Armillariella mellea (Fr.) Karst., andPhytophthora cinnamomi Rands.
USDA Forest Service, Forestry Sciences Laboratory, Pacific Northwest Forest and Range Experiment Station, 97331, Corvallis, Oregon.
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Hutchins