Coccomycosis of Stone-Fruit Crops

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Coccomycosis of Stone-Fruit Crops

 

a disease of amygdalaceous fruit trees, caused by the Ascomycete Coccomyces hiemalis (conidial stage, Cylindrosporium hiemale). It primarily affects the leaves; small reddish spots appear which subsequently enlarge and merge. In damp weather a pinkish film develops on the underside of the spots. A severe affection causes the leaves to turn brown and dry; the dead tissue often falls out, forming little holes. Coccomycosis of stone-fruit crops is widespread in the USA and Western Europe; it is found in the USSR in Latvia, Estonia, Byelorussia, Kaliningrad Oblast, and the Ukraine. Favorable factors for the disease are a rainy summer, abundant dew, severe fog, and temperatures around 21°C. Control measures call for removing and destroying fallen leaves and treating the plants with fungicides.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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