Canker


Canker

Canker and anthracnose are general terms for a large number of different plant diseases, characterised by broadly similar symptoms including the appearance of small areas of dead tissue, which grow slowly, often over a period of years. Some are of only minor consequence, but others are ultimately lethal, and of major economic importance in agriculture and horticulture. Different cankers and anthracnoses are caused by a wide range of organisms, including fungi, bacteria, mycoplasmas and viruses. The majority of canker-causing organisms are tied obligately to a single host species or genus, but a few will attack a wider range of plants. Canker can be spread by weather and animals, making an area that even has a slight amount of canker hazardous.

Some cankers are treatable with fungicides or bactericides, but many are not; often the only treatment available is to destroy the infected plant to prevent the disease from spreading to other plants.

Some cankers:
*Apple canker, caused by the fungus "Nectria galligena"
*Ash bacterial canker, caused by the bacterium "Pseudomonas syringae"
*Butternut canker, caused by the fungus "Sirococcus clavigignenti-juglandacearum"
*Citrus canker, caused by the bacterium "Xanthomonas axonopodis"
*Cypress canker, caused by the fungus "Seridium cardinale"
*Dogwood anthracnose, caused by the fungus "Discula destructiva"
*Grape canker, caused by the water mould "Eutypa lata"
*Honey locust canker, caused by the fungus "Thyronectria austro-americana"
*Mulberry canker, caused by the fungus "Gibberella baccata"
*Oak canker, caused by the fungus "Diplodia quercina"
*Pine pitch canker, caused by the fungus "Fusarium pini"
*Plane anthracnose, caused by the fungus "Apiognomonia veneta"
*Poplar canker, caused by the bacterium "Xanthomonas populi"
*Rapeseed stem canker, caused by the blackleg fungus "Leptosphaeria maculans"
*Rose cankers, caused by the fungus "Leptosphaeria coniothyrium" and "Cryptosporella umbrina"
*Scleroderris canker, caused by the fungus "Gremmeniella abietina"
*Willow anthracnose, caused by the fungus "Marssonina salicicola"

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External Links

* [http://www.oznet.ksu.edu/library/plant2/mf2658.pdf Canker Diseases of Trees]


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  • Canker — Can ker (k[a^][ng] k[ e]r), n. [OE. canker, cancre, AS. cancer (akin to D. kanker, OHG chanchar.), fr. L. cancer a cancer; or if a native word, cf. Gr. ? excrescence on tree, ? gangrene. Cf. also OF. cancre, F. chancere, fr. L. cancer. See… …   The Collaborative International Dictionary of English

  • Canker — Can ker (k[a^][ng] k[ e]r), v. t. [imp. & p. p. {Cankered} ( k[ e]rd); p. pr. & vb. n. {Cankering}.] 1. To affect as a canker; to eat away; to corrode; to consume. [1913 Webster] No lapse of moons can canker Love. Tennyson. [1913 Webster] 2. To… …   The Collaborative International Dictionary of English

  • Canker — Can ker, v. i. 1. To waste away, grow rusty, or be oxidized, as a mineral. [Obs.] [1913 Webster] Silvering will sully and canker more than gliding. Bacom. [1913 Webster] 2. To be or become diseased, or as if diseased, with canker; to grow… …   The Collaborative International Dictionary of English

  • canker — [kaŋ′kər] n. [ME < OFr cancre < L cancer: see CANCER] 1. an ulcerlike sore, esp. in the mouth: thought to be an immune reaction: cf. COLD SORE: also canker sore 2. a) a disease of plants that causes local decay of bark and wood b) a… …   English World dictionary

  • canker — O.E. cancer, from L. cancer (see CANCER (Cf. cancer)); influenced in M.E. by O.N.Fr. cancre (Mod.Fr. chancre). The word was the common one for cancer until c.1700. Canker blossom is recorded from 1580s …   Etymology dictionary

  • canker — [n] blistered infection bane, blight, blister, boil, cancer, corrosion, corruption, lesion, rot, scourge, smutch, sore, ulcer; concept 306 canker [v] blight, corrupt animalize, bestialize, consume, corrode, debase, debauch, demoralize, deprave,… …   New thesaurus

  • canker — ► NOUN 1) a destructive fungal disease of trees that results in damage to the bark. 2) an open lesion in plant tissue caused by infection or injury. 3) fungal rot in parsnips, tomatoes, or other vegetables. 4) an ulcerous condition in animals,… …   English terms dictionary

  • canker — index decay, degenerate, infect, pervert Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • canker — /kang keuhr/, n. 1. a gangrenous or ulcerous sore, esp. in the mouth. 2. a disease affecting horses feet, usually the soles, characterized by a foul smelling exudate. 3. a defined area of diseased tissue, esp. in woody stems. 4. something that… …   Universalium

  • canker — [[t]kæ̱ŋkə(r)[/t]] cankers 1) N COUNT A canker is something evil that spreads and affects things or people. [FORMAL] As in Europe, the canker of anti Semitism is growing again in America. Syn: cancer 2) N VAR Canker is a disease which affects the …   English dictionary


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