Host Tree

Many Armillaria species are economically damaging pathogens with a broad host range, which cause disease in coniferous and deciduous tree species and shrubs. Most woody plants are probably susceptible to the disease to some extent, also young and some non-woody plants may be attacked. Age of the host may influence the disease and older trees can tolerate infections much better and they survive much longer with infection. Older trees often get butt rot if they are infected rather than extensive killing of sapwood, cambium, and phloem. With conifers, killing of young, vigorous trees is common especially in plantations.