Phytophthora nicotianae or black shank is an oomycete belonging to the order Peronosporales and family Peronosporaceae.
Black shank affecting a field of tobacco
Black shank infection on American boxwood
Phytophthora nicotianae disease cycle
Black shank disease effects
The oomycetes, or Oomycota, form a distinct phylogenetic lineage of fungus-like eukaryotic microorganisms within the Stramenopiles. They are filamentous and heterotrophic, and can reproduce both sexua
Phytophthora nicotianae
…Phytophthora nicotianae or black shank is an oomycete belonging to the order Peronosporales and family Peronosporaceae. Phytophthora nicotianae has a broad host range comprising 255 genera from 90 families…
Sexual structures (only oogonia, antheridia not shown) of Saprolegnia.[citation needed]
Pythium sp. (Peronosporales), which causes pythiosis in animals, under microscope.
Symptom of late blight (P. infestans, Peronosporales) on the underside of a potato leaf.
Albugo candida (Albuginales) on shepherd's purse (Capsella bursa-pastoris, Brassicales).