Hemlock Diseases

Hemlock: Annosus root rot categories: Conifers Hemlock Hemlock Diseases Ornamentals last review date: 2025-08-13 08:20 Annosus root rot decayed wood with black flecksPhoto by: B.M. Johnson Biology Annosus root rot is caused by the fungus Heterobasidion annosum. This native soil pathogen is often in large old tree stumps. It can live several decades as a […]

Hemlock: Phytophthora root rot categories: Conifers Hemlock Hemlock Diseases Ornamentals last review date: 2025-08-13 08:27 Dieback on creeping hemlock due to Phytophthora root rotPhoto by: R.S. Byther Biology Phytophthora root rot is usually a problem only in areas with poor drainage or where flooding occurs. The fungus attacks the roots, which rot and die. Phytophthora […]