• Abnormal Discoloration 
• Deformed Growth 
• Dead Branches
• Infestations

Causes can include:

• Disease
• Lack of nutrients
• Too many nutrients 
• Over watering
• Under watering
• Insect infestation
• Improper pruning/trimming techniques
• Construction activities

Cause For Major Concern:

If you don't pay attention to your trees, you can lose them. Worse case scenario sick or dying trees can cause property damage or become life endangering. (As a result of  falling on something or someone.) Furthermore you could be held responsible for damage or personal injury caused by a tree on your property. 

Remember treatment is less expensive than replacement!

Warning signs of potential structural instability include the following:

• Cracks in the trunk or major limbs.
• Hollow and decayed areas.
• The presence of dead wood.
• Mushrooms growing at the base of the tree. (Possible sign of decay!)

Other factors that could be contribute to structural instability include: 

• Trees that have been subjected to construction activities such as:  trenching, digging, removing or adding soil. (Can cause root death.)
• Storm damage and flooding can cause root damage and structural instability as well.