purple blotch

purple blotch

[′pər·pəl ¦bläch]
(plant pathology)
A fungus disease of onions, garlic, and shallots caused by Alternaria porri and characterized by small white spots which become large purplish blotches.
References in classic literature ?
In front, upon a raised platform behind a rail, sat a stout, florid-faced personage, with a nose broken out in purple blotches.
The variety was developed by EASEED Company and it matures in 90 days, is resistant to purple blotch, tuber rust and blight.
Increased moisture, especially from the excessive rainfall Georgia experienced in November and December, can raise the potential risk for diseases like Botrytis leaf blight, purple blotch and Stemphylium leaf blight.
If this ink were to leak in your field vest it would go through many layers of clothes and leave a purple blotch on your skin that will not wash off for a month or more.
There are reliable bulbs and corms for summer, too ( old favourites like lilies and newly fashionable Acidanthera murielae (pictured), bearing numerous pure white blooms with a purple blotch in the throat.
Pointing to a purple blotch, where he has a cabin with a Grassy Narrows trapper, Billard says, "If they cut here, we'll have to pretend we're living in a forest." His passion is simple; he cares about old-growth forests and about a way of life.
The tragic events started when Aleesha was sick and developed a purple blotch on her ribcage at 7.30pm.
When his parents examined him they found a series of mysterious purple blotches on his skin, which spread very quickly.
Fred's rash is impressive: big, purple blotches all over.