Leaf Cast

Also found in: Dictionary, Thesaurus.

leaf cast

[′lēf ‚kast]
(plant pathology)
Any of several diseases of conifers characterized by falling of the needles.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Leaf Cast


a disease of coniferous needles caused by pathogenic fungi. There are three types of leaf cast. The most common is caused by ascomycetes of the genus. Lophodermium. A second type is caused by the ascomycete Phacidium infestons, and a third by the imperfect fungi of the genus Meria.

Symptoms of leaf cast are yellowing and then browning and falling of the needles. In leaf cast caused by Phacidium infestans, a white gossamer-like mycelium appears in the spring; the needles turn brown, and by autumn they are ash-gray. Leaf cast is especially dangerous in tree nurseries. Control measures include removal and burning of dead plants and fallen needles, pinching off diseased needles, arid spraying seedlings (before the formation of the snowy covering) with a suspension of zineb or other fungicides.


Zhuravlev, I. I., and D. V. Sokolov. Lesnaia fitopalologiia. Moscow, 1969.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
Mentioned in ?