Meaning of psyllid yellows

psyl'lid yel'lows

Pronunciation: [key]
— (used with a sing. or pl. v.) Plant Pathol. (used with a sing. or pl. v.)Plant Pathol.
  1. a viral disease transmitted by the potato psyllid, causing the young leaves of potatoes, tomatoes, eggplants, and peppers to curl and turn yellow or purplish.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.