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单词 black knot
释义

black knot

noun

1
: a destructive disease of plum and cherry trees characterized by black excrescences on the branches and caused by a fungus (Dibotryon morbosa)
2
: a destructive disease of the gooseberry characterized by black excrescences on the branches and caused by a fungus (Dibotryon ribesia)
3
: a disease of the filbert and hazel characterized by black warty excrescences on the bark and caused by a fungus (Cryptosporella anomala)
4
: a cane infection of the grape caused by the crown-gall bacterium
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更新时间:2026/5/30 22:30:42