| 单词 | black knot |
| 释义 | black knotnoun1 : 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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