Canker

{
  "id": "MLC-T-ENV-004054",
  "term": "Canker",
  "field": "Environment",
  "definition": "Localized, dead, sometimes sunken, portion of the cambium and bark of branches or the bole of a tree, often caused by a pathogen. Many layers of dead callus folds surround some cankers as the tree repeatedly attempts to heal the dead portion, only to have the pathogen kill the callus folds.",
  "references": [
    "USDA Forest Service Field Guide to Insects and Diseases of Arizona and New Mexico Forests Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/canker/"
}