Phytophthora ramorum Occurrence in Ornamentals in Serbia

Phytophthora ramorum

Phytophthora ramorum in North America

Two apparently unlinked events marked the beginning of one of the most devastating forest diseases known to man in recent times: Sudden Oak Death (SOD). In the mid 1990s, while a novel species of Phytophthora was being isolated from mildly diseased Rhododendron and Viburnum plants in German and Belgian nurseries, the first reports of inexplicable death of tanoaks (Notholithocarpus densiflorus) ...

Genetic Diversity of Phytophthora ramorum in Belgium

Phytophthora ramorum is thought to be an introduced pathogen in North America and in Europe based on the presence of only three clonal lineages. The North American lineages (NA1 and NA2) are responsible for infections in North American forests and nurseries, while the European lineage (EU1) is responsible for infections in Europe, mostly in nurseries. There have also been a few isolated finding...

Phytophthora ramorum: a pathogen with a remarkably wide host range causing sudden oak death on oaks and ramorum blight on woody ornamentals.

UNLABELLED Phytophthora ramorum is an oomycete plant pathogen classified in the kingdom Stramenopila. P. ramorum is the causal agent of sudden oak death on coast live oak and tanoak as well as ramorum blight on woody ornamental and forest understorey plants. It causes stem cankers on trees, and leaf blight or stem dieback on ornamentals and understorey forest species. This pathogen is managed i...

Status of California’s Phytophthora ramorum Stream Survey

Since 2004, we have annually monitored Phytophthora ramorum in streams, creeks, and rivers throughout infested and at-risk areas of California by baiting with rhododendron leaves. This survey helps delineate the pathogen’s range and can quickly detect its spread. Our sites are dispersed from Del Norte to San Luis Obispo counties on the coast, and in Butte, El Dorado, Nevada, Placer, and Yuba Co...