Presented by William Scott | ISA Board Certified Master Arborist Urban Forest Professional

Wood decay and biomechanical instability are major contributors to tree failure but can be difficult to detect and evaluate. This course reviews the biology of wood decay fungi, methods for identifying external and internal signs, and the application of biomechanics to predict failure potential. Case studies and diagnostic tools (resistographs, sonic tomography, and visual inspection) will be discussed to provide arborists with practical approaches for evaluating hidden risks.

Learning Outcomes

• Explain the biology of wood decay organisms and their effects on trees.
• Identify visual and diagnostic indicators of internal decay.
• Apply biomechanical principles to evaluate tree stability and failure risk.
• Use diagnostic tools to support decay assessment and management decisions.

Earn the Following CEUs Upon Completion:

• 3.5 - ISA Certified Arborist
• 3.5 - ISA BCMA – Science
• 3.5 - ISA Practice
• 3.5 - ISA Urban Forest Professional

Time/Place of Live Training

• February 27th, 2026
• 10:00am – 1:30pm MST
• Live via Zoom Webinar