A Gram-positive bacterium that inhibits several root-rot pathogens was isolated from alder forest soil on the Oregon coast. This organism, similar to Bacillus 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 (...

Abstract The article assumes that, the areas of dark coniferous forests with disturbed and lost stability are catastrophically expanding in Siberian regions modern period. This fully applies to plantations a prevalence Abies sibirica Ledeb., located southern part Yenisei Siberia (territory Krasnoyarsk Region). research was carried out spruce fir Biryusinsky district forestry KGU “Emelyanovskoye...

UNLABELLED Armillaria root disease affects fruit and nut crops, timber trees and ornamentals in boreal, temperate and tropical regions of the world. The causal pathogens are members of the genus Armillaria (Basidiomycota, Physalacriaceae). This review summarizes the state of knowledge and highlights recent advances in Armillaria research. TAXONOMY Armillaria includes more than 40 morphologica...

six fluorescent compounds were isolated and characterized in rhizomorph of a. mellea and were presented first as: f , f , f , mf , mf and mf . these compounds differed by rf on chromatoplaque, max in uv spectra and ex, em and max in fluorescence spectra. their gc-ms analysis indicated that f has a phenolic moiety and the other five are the benzenic derivatives. f compound was more fluorescent r...