To save this word, you'll need to log in.
Definition of thread blight
: a disease of cocoa, tea, citrus, and other woody plants in semitropical and tropical countries caused by basidiomycetous fungi of the genera Pellicularia and Marasmius that form filamentous strands of mycelium over the surface of leaves and twigs
Comments on thread blight
What made you want to look up thread blight? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Confusing Words—A Quiz
- I invented a brand new toaster robot and
______it "Sir Toasts-a-Lot."
Can you spell these 10 commonly misspelled words?
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
- Confusing Words—A Quiz
Test your knowledge of these commonly confused words!
Take the quiz - Here Be Dragons: A Creature Identification Quiz Take the quiz
- Spell It
Can you spell these 10 commonly misspelled words?
Take the quiz - Dictionary Devil
The dictionary has been scrambled—can you put it back together?
Play the game
Share thread blight
Resources for thread blight