Heterobasidion occidentale and H. irregulare - a disposition of two North American species.
What's in a name? Two of the most serious wood pathogens of conifers worldwide have been renamed by U.C. Berkeley and US Forest Service
scientists. Because of the significant economic and scientific importance of these organisms, and because one of them was introduced in Europe by US soldiers
during World War II, this is a long-awaited publication.