Abiotic Tree Diseases

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It's not hard to understand how much trees give to society day to day. They offer ecological, economic, and aesthetic benefits to the landscape. Many people are familiar with tree diseases caused by fungi, bacteria, and insects (biotic factors), many tree health problems are actually due to abiotic factors (non living). These conditions are categorized as abiotic tree diseases or disorders.

What Are Abiotic Tree Diseases?

Abiotic tree diseases are caused by environmental or human caused activities rather than living organism issues.  These diseases are not infectious, but instead arise when environmental conditions align.

Abiotic tree disorders include:

• Drought / Overwatering 

• Mulch misuse (mulch volcano) 

• Extreme temperatures (heat/frost)

• Soil compaction (vehicle/foot traffic compaction)

• Poor drainage 

• Pollution

• Mechanical injuries

• Nutrient deficiencies  

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Symptoms of Abiotic Disorders

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Most abiotic disease signs tend to look almost exactly how many biotic disease signs appear making it difficult for tree owners to distinguish the cause.

Signs include:

1. Leaves

• Wilting

• Yellowing

• Browning 

• Leaf scorch / premature leaf drop

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2. Structural

• Cracked / splitting bark

• Stunted growth

• Dieback in upper part of canopy

• Fungal root rot

• Root damage / dieback

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Fungal root rot shown below:

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What can be done?

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Unfortunately, there is no outright cure for these issues. Although, there are many preventive actions that can be taken:

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• Proper pruning practices (proper timing)

• Proper watering during times of drought (not over watering or underwatering) 

• Proper mulching 

• Avoiding mechanical damage (hitting trees with objects) 

• Diagnosis of soil compaction and nutrient deficiencies,  

• Correct management of tree species planting and placement 

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Weed wacked trees root collars are very common (as shown below):

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^Conclusion

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Most tree problems aren't caused by pests or disease—they're due to environmental stress. That’s why our ISA-certified arborists at Tree Scouts are trained to diagnose and prevent these hidden threats. Protect your investment—your trees—with a free consultation today.   

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