Ash yellows

{
  "id": "MLC-T-ENV-002195",
  "term": "Ash yellows",
  "field": "Environment",
  "term_source": "Ash Yellows",
  "definition": "(Phytoplasma infection of ash trees.) Symptoms that are characteristic of diseases caused by phytoplasmas include yellowing of leaves, reduced size of leaves, stunting of the plant, and proliferation of axillary buds (buds in the leaf axil where the leaf's petiole is attached to the stem). Such growth from axillary buds often results in a witches' broom appearance, or symptom. Other symptoms may be dieback (death) of terminal portions of branches on trees and other woody plants, poor growth of roots, and bunchy growth at ends of branches.",
  "subject": "Biological substances",
  "references": [
    "USDA Agricultural Research Service Phytoplasma Resource Center at http://plantpathology.ba.ars.usda.gov/pclass/pclass_whatarephytoplasmas.html"
  ],
  "url": "https://mlchart.com/terminology/environment/ash-yellows/"
}