| 单词 | black root rot | 
| 释义 | black root rotnoun  : any of several diseases of plants marked by dark often confluent lesions of the root and sometimes the crown often involving the whole cortex: such as    a     : a disease of apples caused by a fungus (Xylaria mali)    b     : a disease of tobacco and various other plants caused by a fungus (Thielaviopsis basicola)    | 
	
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