ring spot

ring spot
noun
1. : a lesion of plant tissue consisting of yellowish, purplish, or necrotic, often concentric rings
2. : any plant disease of which ring spots are the characteristic lesion: as
a. : a virus disease of tobacco and related plants producing chlorotic rings on the leaves
b. : a disease of sugarcane caused by a fungus (Leptosphaeria sacchari) and characterized by purplish bordered spots
c. : a disease of the lower leaves of cauliflower and related crucifers caused by a fungus (Mycosphaerella brassicicola)
d. : an anthracnose of lettuce caused by a fungus (Marssonina panathoniana)
e. : frogeye a(1)

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Plant Pathol.
any of various plant diseases caused by a virus or fungus and characterized by concentric rings of discoloration or necrosis on the leaves.
[1905-10]

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ring|spot «RIHNG SPOT», noun, or ring spot,
1. a yellowish, necrotic discoloration in the form of spots or circles, symptomatic of a disease in plants.
2. any one of various plant diseases characterized by such discoloration: »

tobacco ringspot.


Useful english dictionary. 2012.

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  • ring|spot — «RIHNG SPOT», noun, or ring spot, 1. a yellowish, necrotic discoloration in the form of spots or circles, symptomatic of a disease in plants. 2. any one of various plant diseases characterized by such discoloration: »tobacco ringspot …   Useful english dictionary

  • ring spot — ring′ spot n. ppa any of various viral or fungal plant diseases characterized by concentric rings of discoloration or necrosis on the leaves • Etymology: 1905–10 …   From formal English to slang

  • ring spot — noun Date: 1923 1. any of various plant diseases caused by viruses (genus Nepovirus of the family Comoviridae) and marked by circular lesions of usually chlorotic or necrotic tissue 2. a turf disease caused by an ascomycetous fungus… …   New Collegiate Dictionary

  • ring spot — Plant Pathol. any of various plant diseases caused by a virus or fungus and characterized by concentric rings of discoloration or necrosis on the leaves. [1905 10] * * * …   Universalium

  • corky ring spot — noun : internal brown spot …   Useful english dictionary

  • necrotic ring spot — noun : a virus lead spot of cherries characterized by small dark water soaked sometimes incomplete rings which may alternate with the normal green tissue and later often drop out and give the leaf a shredded or tattered appearance …   Useful english dictionary

  • black ring spot — noun see black ring …   Useful english dictionary

  • Spot the Dog — is a series of books by Eric Hill, which were later made into a popular children s animation for BBC television by David McKee s King Rollo Films .First published in 1980, Where s Spot was inspired by the reaction of Eric s 2 year old son to an… …   Wikipedia

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  • fairy ring spot — noun : a disease of carnations found especially in the greenhouse and caused by a fungus (Heterosporium echinulatum) that produces on the leaves bleached spots with concentric dark zones …   Useful english dictionary

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