Canker

Canker: Dead sections that appear on the main trunk or branches of trees. Cankers usually occur from mechanical injuries or fungal or bacterial infections. This type of disease can quickly cause a lot of harm to the infected tree, and kill all of the bark on a main stem or branch; if the main stem or trunk is infected that the entire tree could die. Mechanical injuries can cause an opportunity for wood-rotting organisms to invade the plant. Every step to prevent cankers including proper and regular tree care and maintenance should be taken to avoid cankers.