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aster yellows

American  

noun

Plant Pathology.

  1. a dwarfing and yellowing of asters and various other plants, caused by a mycoplasma transmitted by a leafhopper.

Etymology

Origin of aster yellows

First recorded in 1920–25

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

One stumbling block was the prevalence of a disease named aster yellows, which killed almost a quarter of all the plants in the trial and interfered with the long-term evaluation.

From Washington Post • Feb. 16, 2021

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.