aster yellows

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aster yellows

pl.n. (used with a sing. verb)
A widespread disease of plants caused by a phytoplasma, usually resulting in stunted growth and yellowing of infected individuals.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.