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1A destructive fungal disease of apple and other trees that results in damage to the bark.‘cut out lesions on branches caused by canker’
- ‘But chief health officer Chris Adriaansen says states want trees in the quarantine area at Emerald individually inspected for canker.’
- ‘In the first stage, 8,000 trees are being treated with a copper spray, to contain the canker when trees are chopped down and burnt.’
- ‘Activity in the citrus orchards of central Queensland has ground to a halt as the state calls for help to deal with the mammoth task of inspecting trees for the disease canker.’
- ‘Trees appear to resist bacterial canker but are very susceptible to fire blight.’
- ‘It pays to be on the lookout for apple scab, canker and mildew, tackling any problems before they become deeply ingrained and hard to treat.’
- 1.1[count noun]An open lesion in plant tissue caused by infection or injury.‘check trees for cankers’
- ‘He visits other chestnut trees, too, packing mud on their cankers and clipping flowers for use in breeding programs.’
- ‘As the infection progresses, trees undergo twig and branch dieback and develop stem cankers, which results in tree-death.’
- ‘Removal of bark over the canker reveals a sharply defined region of darkened or discolored wood bordered by white, healthy wood.’
- ‘Punching holes around each canker, Cummings Carlson's team inoculated the tree with a slurry of hypovirulent fungus.’
- ‘In dry edible beans, anthracnose causes unsightly cankers on plant stems, pods, and seeds.’
- 1.2Fungal rot in some fruits and vegetables, e.g. parsnips and tomatoes.‘canker is this crop's arch enemy’
2An ulcerous condition or disease of a human or animal, in particular.
- 2.1North American A small ulcer of the mouth or lips.‘a remedy for canker sores’
sore, ulceration, open sore, abscess, boil, carbuncle, pustule, blister, cyst, gumboil, wenView synonyms
- ‘Call your doctor if your child's canker sore gets worse.’
- ‘If your child's doctor prescribes a medicine that should be applied directly to the canker sore, first dry the area with a tissue.’
- ‘Once it does, the canker sore may swell and burst in about a day.’
- ‘Most villagers show symptoms such as skin cankers as a result of breathing the poisonous air or drinking the polluted water over a long period.’
- ‘When my husband was a little boy, the doctor told his mom he had a canker sore.’
- ‘This means that you swish the medicine around in your mouth, especially around your canker sore, for a few minutes before swallowing it.’
- 2.2another term for thrush
- 2.3Ulceration of the throat and other orifices of birds, typically caused by a protozoal infection.‘secondary infections of canker and coccidiosis’
- 2.4Inflammation of the ear of a dog, cat, or rabbit, typically caused by a mite infestation.
- ‘Whether or not ear mites are present, accumulated ear wax in a dog's ear can lead to ear canker and other serious infections.’
- ‘When we took our cat to the clinic yesterday, the vet told us that the ear mites were gone, but he thinks that the ear canker may be too strong for our cat and it caused irritation.’
- ‘It promotes healing and dries up the inner ear canker as well as the external areas that may become sore and moist from the canker discharge.’
- ‘Be sure to purchase ear canker powder as it has the additional benefit of helping to control canker and ear mites in your Shih Tzu.’
- ‘Ear mite or ear canker is a very common infection in most rabbitries and is economically important because of the loss of condition and poor reproductive performance that this infestation can cause.’
- 2.1North American A small ulcer of the mouth or lips.
3A malign and corrupting influence that is difficult to eradicate.[in singular] ‘racism remains a canker at the heart of the nation’
blight, evil, scourge, poison, cancer, sickness, disease, pestilence, plagueView synonyms
- ‘Now the big question is how to curb the canker of corruption and restore much needed probity in public life.’
- ‘The problem is the blind smugness of a society, and a political class, that see teenage violence simultaneously as a canker and an abstraction.’
- ‘Yet it is impossible not to recognise in the modern game an additional and growing canker that has attached itself to all the old familiar forms of dubious behaviour.’
- ‘‘That is the canker in the heart of the Conservative Party and that is what sparked the trouble,’ he said’
- ‘Anti-intellectualism is a hideous canker in our society, but it feeds on needless pretension and superiority.’
- ‘His hurt never diminished and remained as a canker that ate away at him as he grew older.’
- ‘It is quite a remarkable thing for a novelist to name the canker that makes for human rottenness, especially since James does it with such fine literary craft and such acute theological discernment.’
- ‘As music lovers might we not more frequently draw attention to this noise canker in our society?’
- ‘For politicians, the overstayer issue is a bit of a canker.’
- ‘There is a certain pathological view about corruption, about the entire organ being diseased, about a canker in national character, a view which has no basis in facts.’
- ‘‘The frenzied addiction to art,’ wrote Baudelaire, is a canker that devours.’
1[no object] (of woody plant tissue) become infected with canker.‘we found some cankering of the wood’
- ‘Stems may be girdled just above the soil line; tissue thus damaged may appear cracked or cankered.’
- ‘Spring shoot growth on diseased canes is weak and stunted above the cankered area.’
- ‘Tiny black specks, which are reproductive bodies of the cane blight fungus, develop in the brown cankered bark.’
- ‘Many larger trees showed cankered boles and parasite-bloated boughs.’
- ‘Because of Adam's sin, the whole mass of mankind is cankered at the roots.’
2Infected with a pervasive and corrupting bitterness.‘he hated her with a cankered, shameful abhorrence’
- ‘I'm a 37-year-old graduate student who's having the usual dating difficulties common among those of us who are old and grey and cankered.’
- ‘Your gold and silver is cankered; and the rust of them shall be a witness against you, and shall eat your flesh as it were fire.’
- ‘I mean, you know, irony's funny and all, but if all you do is make fun of other things, you get this kind of cankered, empty feeling.’
Middle English (denoting a tumour): from Old French chancre, from Latin cancer crab (see cancer).
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