Sclerotinia sclerotiorum Cottony soft rot General Sclerotinia sclerotiorum, also known as cottony soft root, is a plant pathogenic fungus. It has a…
Pythium ultimum Black leg of seedlings General Pythium is considered a ‘weak pathogen’, meaning that it can usually only affect plants that are in a…
Pyrenophora graminea Leaf stripe General Pyrenophora graminea is a disease of Barley that causes significant yield losses. Life cycle and appearance…
Phomopsis sclerotioides Black root rot of cucurbits General Phomopsis sclerotioides is a plant pathogen infecting cucurbits, causing black root rot of…
Phytophthora cactorum Apple collar rot General Phytophthora cactorum is a plant pathogen that causes root rot, rhizome rot of strawberry, apple rot,…
Clavibacter michiganensis sp. Bacterial canker of tomato General Clavibacter is a quarantine organism in Europe, which means that strong efforts are…
Mycosphaerella cucumis (Didymella bryoniae) Gummy stem blight General Mycosphaerella cucumis (Didymella bryoniae) is a fungal plant pathogen that…
Alternaria solani Early blight General The only known stage in all Alternaria species is the asexual stage. Conidia and mycelium overwinter in the…
Pseudoperonospora cubensis Downy mildew of Cucurbits General Pseudoperonospora cubensis is a plant pathogen causing downy mildew on cucurbit crops…
Xylella fastidiosa Pierce's disease of grapevine General Xylella fastidiosa is a gram-negative bacterium which is limited to xylem tissue. It has many…
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