Signs That Your Tree Might Have a Disease

Common Signs of Tree Disease

1. Discolored or Wilting Leaves
   Healthy leaves should maintain vibrant colors throughout their growing season. If your tree’s leaves are yellowing, browning, or wilting, it could be a sign of nutrient deficiencies, root rot, or fungal infections. This symptom often starts in localized areas but can spread quickly if left untreated.
2. Fungal Growth
   Fungal infections are a serious concern for trees in Tucson. Common fungi, such as mushrooms at the base of the trunk or cankers along the bark, indicate internal decay. These fungi weaken the tree’s structure, increasing the risk of falling branches or trunk failure.
3. Dead or Dying Branches
   A key sign of disease is the presence of dead, brittle branches that no longer produce leaves. This often results from fungal infections or insect infestations. Dead branches can also pose safety risks, especially during windy weather.
4. Unusual Bark Texture or Cracks
   Healthy bark is firm, intact, and consistent. If your tree’s bark is peeling, cracking, or displaying sunken areas, it could indicate disease, pest infestations, or environmental stress. Pay attention to areas with missing bark, as these may harbor harmful organisms.
5. Stunted Growth
   Trees that are diseased often experience reduced or uneven growth. Fewer leaves, shorter branches, or an overall smaller canopy can point to underlying health issues.
6. Insect Infestations
   Insects like bark beetles, borers, or aphids often target diseased trees. Look for small holes, sawdust-like frass, or clusters of insects on the bark or leaves. While not all insects cause disease, their presence can exacerbate existing conditions.

What to Do If Your Tree Is Diseased

• Consult a Certified Arborist: Licensed arborists, like our team at Southwest Environmental Management, can assess your tree’s condition and recommend effective treatments.
• Prune Affected Areas: Remove diseased branches promptly to prevent the spread of infection.
• Consider Preventive Care: Invest in a plant healthcare program to strengthen your trees and reduce the risk of future disease.

By staying vigilant and addressing early warning signs, you can save your trees and maintain the health of your outdoor space.