Ophiostoma novo-ulmi
Fungi» Ascomycota» Sordariomycetes» Ophiostomatales» Ophiostomataceae» Ophiostoma novo-ulmi
Two destructive pandemics of Dutch Elm Disease occurred in the 20th century, caused by two closely related micro-fungi. Ophiostoma novo-ulmi, initially termed the aggressive subgroup of O. ulmi sensu lato, was responsible for the...
Phytophthora cinnamomi
Chromista» Oomycota» Peronosporomycetes» Peronosporales» Peronosporaceae» Phytophthora cinnamomi
This fungus-like organism is a soil-borne pathogen causing disease on many woody hosts. Primary infections in the root system result in two main types of (visible) symptoms: bleeding cankers on trunks and/or crown symptoms (little leaves, yellowing, ...
Seiridium cardinale
Fungi» Ascomycota» Sordariomycetes» Xylariales» Amphisphaeriaceae» Seiridium cardinale
Seiridium cardinale is a micro-fungus that causes a lethal canker disease on cypress and other related conifers. The first evidence of the disease is a browning or reddening of the live bark around the point of entry of the pathogen. Subsequen...