blight


blight
blightingly, adv.
/bluyt/, n.
1. Plant Pathol.
a. the rapid and extensive discoloration, wilting, and death of plant tissues.
b. a disease so characterized.
2. any cause of impairment, destruction, ruin, or frustration: Extravagance was the blight of the family.
3. the state or result of being blighted or deteriorated; dilapidation; decay: urban blight.
v.t.
4. to cause to wither or decay; blast: Frost blighted the crops.
5. to destroy; ruin; frustrate: Illness blighted his hopes.
v.i.
6. to suffer blight.
[1605-15; of uncert. orig.]
Syn. 2. curse, plague, scourge, bane.

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Any of various plant diseases whose symptoms include sudden and severe yellowing, browning, spotting, withering, or dying of leaves, flowers, fruit, stems, or the entire plant.

Usually the shoots and other young, rapidly growing tissues of a plant are attacked. Most blights are caused by bacteria or fungi (see fungus); some result from drought. Fungal and bacterial blights are most likely under cool, moist conditions. Most economically important plants are susceptible to one or more blights. Measures taken to fight blight include destroying the infected plant parts; using disease-free seed or stock and resistant varieties; rotating crops (see crop rotation); pruning and spacing plants for better air circulation; controlling pests that carry the fungus from plant to plant; avoiding overhead watering and working among wet plants; and, where needed, applying fungicides or antibiotics. Maintaining sanitary conditions is the most important measure for stopping the spread of the infestation. See also chestnut blight.

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 any of various plant diseases whose symptoms include sudden and severe yellowing, browning, spotting, withering, or dying of leaves, flowers, fruit, stems, or the entire plant. Usually the shoots and other young, rapidly growing tissues of a plant are attacked. Most blights are caused by bacterial or fungal infestations, but they can also occur from drought. Fungal and bacterial blights are most apt to occur under cool, moist conditions. Most economically important plants are susceptible to one or more blights.

      Measures for controlling and preventing blight typically involve the destruction of the infected plant parts; use of disease-free seed or stock and resistant varieties; crop rotation; pruning and spacing of plants for better air circulation; controlling pests that carry the fungus from plant to plant; avoidance of overhead watering and working among wet plants; and, where needed, the application of fungicide or antibiotics. Sanitation to stop the spread of the infestation is the cardinal measure. For bacterial blights (e.g., fire blight), fixed copper or streptomycin is an effective antibiotic when applied weekly during damp weather when leaves and shoots are expanding. See also botrytis blight; chestnut blight; fire blight; late blight.

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Universalium. 2010.

Synonyms:

Look at other dictionaries:

  • Blight — refers to a specific symptom affecting plants in response to infection by a pathogenic organism. It is simply a rapid and complete chlorosis, browning, then death of plant tissues such as leaves, branches, twigs, or floral organs. [Agrios, George …   Wikipedia

  • blight — blight; blight·ed; blight·er; blight·ing; blight·ing·ly; un·blight·ed·ly; …   English syllables

  • Blight — (bl[imac]t), v. t. [imp. & p. p. {Blighted}; p. pr. & vb. n. {Blighting}.] [Perh. contr. from AS. bl[=i]cettan to glitter, fr. the same root as E. bleak. The meaning to blight comes in that case from to glitter, hence, to be white or pale, grow… …   The Collaborative International Dictionary of English

  • blight — [blīt] n. [? akin to ME blichening, blight, rust (on grain) < bliknen, to lose color < ON blikja, turn pale: see BLEACH] 1. any atmospheric or soil condition, parasite, or insect that kills, withers, or checks the growth of plants 2. any of …   English World dictionary

  • Blight — Blight, v. i. To be affected by blight; to blast; as, this vine never blights. [1913 Webster] …   The Collaborative International Dictionary of English

  • Blight — Blight, n. 1. Mildew; decay; anything nipping or blasting; applied as a general name to various injuries or diseases of plants, causing the whole or a part to wither, whether occasioned by insects, fungi, or atmospheric influences. [1913 Webster] …   The Collaborative International Dictionary of English

  • blight — blīt n Austral an inflammation of the eye in which the eyelids discharge a thick mucous substance that often seals them up for days and minute granular pustules develop inside the lid called also sandy blight …   Medical dictionary

  • blight — n blast, nip (see under BLAST vb) Analogous words: *injury, damage, hurt, harm: frustration, thwarting (see corresponding verbs at FRUSTRATE) blight vb *blast, nip Analogous words: *injure, damage, hurt, harm, s …   New Dictionary of Synonyms

  • blight — [n] disease; plague affliction, bane, blot on the landscape*, canker, contamination, corruption, curse, decay, dump, evil, eyesore, fungus, infestation, mildew, pest, pestilence, pollution, rot, scourge, sight, withering, woe; concepts 306,674… …   New thesaurus

  • blight — ► NOUN 1) a plant disease, especially one caused by fungi. 2) a thing that spoils or damages something. 3) ugly or neglected urban landscape. ► VERB 1) infect (plants) with blight. 2) spoil or destroy. ORIGIN …   English terms dictionary

  • blight|ed — «BLY tihd», adjective. afflicted with blight; blasted: »A blighted spring makes a barren year (Samuel Johnson). Figurative. A blighted area is a district of a city that is on the way toward becoming a slum (Emory S. Bogardus) …   Useful english dictionary