black root rot

noun

Definition of black root rot

: 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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“Black root rot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/black%20root%20rot. Accessed 27 Jan. 2021.

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