Top Signs of Tree Disease that Indicate it is Time to Call a Tree Doctor

Trees are a vital part of any landscape, providing beauty, shade, and environmental benefits. However, when a tree becomes diseased, it can pose a serious risk to property and safety. Recognizing the signs of tree disease early can help prevent further damage and even save the tree. As professional arborists in Chico, the team at J and J Tree Service recognizes the following as the top warning signs that indicate your tree may be in trouble. If you notice any of them, don’t hesitate to reach out to us for a proper inspection and diagnosis.

Leaf Issues

One of the first signs of tree disease is abnormal leaf color or wilting. If leaves turn yellow, brown, or develop spots outside of their normal seasonal changes, it could be a sign of a fungal or bacterial infection. Diseases like anthracnose or leaf rust commonly cause discoloration and premature leaf drop.

Cankers & Other Growths

If you notice strange growths, such as swelling, mushrooms, or oozing wounds on the trunk, your tree may be infected. Cankers, which are sunken, dead areas of bark, often indicate a fungal infection and can weaken the tree, making it more vulnerable to breaking.

Bark Damage

Healthy trees have firm, intact bark. If you see peeling, cracking, or missing bark, this could indicate disease or decay. In some cases, underlying rot is already present, weakening the tree’s structure and increasing the risk of collapse.

Dead, Dying or Falling Branches

Large dead branches, also known as "dieback," suggest that a tree is struggling to fight off disease or stress. If you notice significant limb loss or a tree that fails to produce new growth in the spring, it may need professional assessment.

Tree Pests

An increase in insects, such as borers or beetles, can signal disease. Some pests feed on weakened trees, while others spread fungi or bacteria that accelerate tree decline. Watch for exit holes, sawdust-like frass, or sap leaks.

If you suspect your tree is diseased, prompt action is essential. J and J Tree Service offers expert tree inspections and tree disease treatments in Chico, CA, and nearby areas. At the first sign of a problem, give our local tree doctors in Chico a call at 530-924-3309 to schedule a consultation and together we can keep your trees healthy for years to come!