powdery scab


Also found in: Wikipedia.

powdery scab

[′pau̇d·ə·rē ′skab]
(plant pathology)
A fungus disease of potato tubers caused by Spongospora subterranea and characterized by nodular discolored lesions, which burst and expose masses of powdery fungus spores.
Mentioned in ?
References in periodicals archive ?
The scientists observed that in general, using mustard as a green manure reduced the incidence of powdery scab, common scab, and Verticillium wilt most consistently.
The presence of potato powdery scab in Venezuela has been reported, but the identity of the pathogen has not been confirmed yet.
Potatoes may get powdery scab and nicotiana is susceptible to powdery mildew.
Horizon" is a crisping variety, a Santa cross with a high resistance to powdery scab and blackleg and partial resistance to Globodera pallida (PCN).
It has good resistance against powdery scab and you simply wash it and boil it to enjoy its distinctly delicious taste.
ADRIENNE SAYS: Your potatoes have probably got powdery scab, which is particularly common in wet seasons and on heavy soils.
So if you want to know more about blight, bacterial speck, ring rot, downy mildew, virus diseases, purple spot, white tip, sclerotium rot, powdery scab, silver scurf, soil rot or gangrene, then this is the book you need.
Powdery scab and black dot can cause yield losses of up to 25 percent in potato crops and prevent tubers from reaching the sizes needed by the French-fry and fast-food industries.
In other studies, Larkin is finding that another Brassica member, Oriental mustard, which contains even more glucosinolates than canola or rapeseed, can curb the fungus causing powdery scab.