cedar-apple rust
noun Date: 1946 a gall-producing disease especially of the apple caused by a rust fungus (Gymnosporangium juniperi-virginianae) that completes the first part of its life cycle on the common red cedar (Juniperus virginiana) and the second on the leaves and fruit of the apple

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • cedar-apple rust — noun rust fungus causing rust spots on apples and pears etc • Syn: ↑apple rust, ↑Gymnosporangium juniperi virginianae • Hypernyms: ↑rust, ↑rust fungus • Member Holonyms: ↑Gymnosporangium, ↑ …   Useful english dictionary

  • cedar apple rust — noun see apple rust …   Useful english dictionary

  • cedar-apple rust — ▪ plant disease  common disease in North America of red cedar (Juniperus virginiana (eastern red cedar)), related Juniperus (juniper) species, apple, and crab apple, caused by the fungus Gymnosporangium juniperi virginianae. Both hosts, the… …   Universalium

  • apple rust — noun rust fungus causing rust spots on apples and pears etc • Syn: ↑cedar apple rust, ↑Gymnosporangium juniperi virginianae • Hypernyms: ↑rust, ↑rust fungus • Member Holonyms: ↑Gymnosporangium, ↑ …   Useful english dictionary

  • cedar apple — noun also cedar ball : a hard brown more or less spherical excrescence on cedar trees of the genus Juniperus formed by various rusts (genus Gymnosporangium) during their telial stage compare apple rust * * * a brown gall on the branches of the… …   Useful english dictionary

  • cedar apple — a brown gall on the branches of the juniper, produced by several rust fungi of the genus Gymnosporangium. [1840 50, Amer.] * * * …   Universalium

  • rust fungus — noun any of various fungi causing rust disease in plants • Syn: ↑rust • Hypernyms: ↑fungus • Hyponyms: ↑flax rust, ↑flax rust fungus, ↑Melampsora lini, ↑ …   Useful english dictionary

  • cedar rust — noun : apple rust * * * cedar rust, 1. a destructive disease caused by a fungus that begins its life cycle on cedar trees and later spreads to apple trees. 2. the fungus that produce this disease …   Useful english dictionary

  • rust — /rust/, n. 1. Also called iron rust. the red or orange coating that forms on the surface of iron when exposed to air and moisture, consisting chiefly of ferric hydroxide and ferric oxide formed by oxidation. 2. any film or coating on metal caused …   Universalium

  • crab apple — 1. a small, sour, wild apple. 2. any of various small, tart, cultivated varieties of apple, used for making jelly and preserves. 3. any tree bearing such fruit. [1705 15] * * * ▪ tree also called  Crab,    any of several small trees of the genus… …   Universalium

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