SINCE 1828
black root rot
nounDefinition 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)
Comments on black root rot
What made you want to look up black root rot? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Original Meanings Quiz
-
- Which of the following is the earliest known sense of the word awe?
Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
-
Original Meanings Quiz
A quiz for the pedantic and those annoyed by them!
Take the quiz -
A Green Quiz
How many questions can you answer about the word "green"?
Take the quiz -
True or False?
Test your knowledge - and maybe learn something along the way.
Take the quiz -
Bee Cubed
Listen to the words and spell through all three levels.
Play the game
Share black root rot
Resources for black root rot