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black canker. In DICTIOUS you will not only get to know all the dictionary meanings for the word
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English
Noun
black canker (countable and uncountable, plural black cankers)
- Any of several plant diseases causing the formation of dark cankers.
- 1927, Plant Research Institute (Canada), Annual Report of the Canadian Plant Disease Survey
- Scab and black canker is rapidly destroying Salix vitellina in Nova Scotia. Ten per cent of the trees surviving from previous years were killed. The damage caused by these two diseases can not be estimated separately.
- The larva of the turnip sawfly (Athalia rosae), an agricultural pest having the appearance of a black caterpillar.
1783, William Marshall, Account of the black canker caterpillar, which destroys the turnips in Norfolk, Royal Society, page 1:Among the numerous enemies to which turnips are liable, none have proved more fatal here than the black canker (a species of caterpillar) which in some years have been so numerous as to cut off the farmer's hopes in a few days.
1869, author unknown, Hardwick's Science Gossip, page 232:In some seasons these pests are exceedingly numerous, and in the Eastern Counties the “Black Canker,” as it is called, lays waste entire fields of turnips.
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