apple scab
noun Date: circa 1899 a disease of apple trees caused by a fungus (Venturia inaequalis) producing dark blotches or lesions on the leaves, fruit, and sometimes the young twigs

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • Apple scab — is a disease of apple trees (genus Malus ) caused by the ascomycete fungus Venturia inaequalis . The disease manifests as dull black or grey brown lesions on the surface of tree leaves, buds or fruits. Lesions may also appear less frequently on… …   Wikipedia

  • apple scab — Disease of apple trees caused by the fungus Venturia inaequalis, producing dark blotches or lesions on the leaves, fruit, and sometimes young twigs. Affected plants may drop their fruit prematurely, resulting in potentially high crop losses.… …   Universalium

  • apple scab — noun : a widespread destructive disease caused by a fungus (Venturia inaequalis) producing dark or sooty blotches on the leaves and blackish scurfy or scablike lesions on the fruit and sometimes on the young twigs * * * apple scab, a fungous… …   Useful english dictionary

  • Scab — can refer to the following:* Coagulation, a clot of bodily fluids * Strikebreaker, person who works despite strike action or takes against will of employeesAnimal and plant diseases* Apple scab, a fungal infection of the apple * Fusarium head… …   Wikipedia

  • Apple — This article is about the fruit. For the technology company, see Apple Inc.. For other uses, see Apple (disambiguation). Apple tree redirects here. For other uses, see Apple tree (disambiguation) …   Wikipedia

  • scab — /skæb / (say skab) noun 1. the encrustation which forms over a sore during healing. 2. Veterinary Science a mangy disease in animals, especially sheep; scabies. 3. Plant Pathology a. a hyperplasic plant disease with scab like lesions: apple scab …   Australian English dictionary

  • apple — /ap euhl/, n. 1. the usually round, red or yellow, edible fruit of a small tree, Malus sylvestris, of the rose family. 2. the tree, cultivated in most temperate regions. 3. the fruit of any of certain other species of tree of the same genus. 4.… …   Universalium

  • scab — [[t]skæ̱b[/t]] scabs 1) N COUNT A scab is a hard, dry covering that forms over the surface of a wound. The area can be very painful until scabs form after about ten days. 2) N COUNT (disapproval) People who continue to work during a strike are… …   English dictionary

  • 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

  • pear scab — noun : a disease of the pear caused by a fungus (Venturia pyrina) that is similar to apple scab but produces lesions more frequently on the twigs …   Useful english dictionary

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