aster yellows

plural noun

Definition of aster yellows

: a widespread disease affecting more than 40 families of plants, characterized especially by yellowing and stunting, and caused by a phytoplasma transmitted by leafhoppers

First Known Use of aster yellows

circa 1907, in the meaning defined above

Keep scrolling for more

Learn More about aster yellows

Time Traveler for aster yellows

Time Traveler

The first known use of aster yellows was circa 1907

See more words from the same year

Statistics for aster yellows

Cite this Entry

“Aster yellows.” Dictionary, Merriam-Webster, Accessed 19 Oct. 2020.

More from Merriam-Webster on aster yellows Encyclopedia article about aster yellows

Comments on aster yellows

What made you want to look up aster yellows? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!