A tree disease can be defined as an abnormal condition that affects a plants ability to properly function. Tree diseases are mainly caused by fungi; however, other organisms such as nematodes, bacteria, and viruses can also cause disease in trees.

Trees in urban environments provide many benefits to our communities. However, an urban setting isn’t always the most conducive environment for a tree to thrive i.e., confined root space, salt, competition for water, compacted soil, and pollution just to name a few.

These abiotic stresses can damage a tree by themselves or cause a tree to become more susceptible to a pathogen or pest.

Its important to remember that many tree diseases cannot be cured after a tree has been infected. Therefore, these diseases must be treated on a preventive basis to ensure that the tree does not succumb to the disease.  Other diseases cannot be cured, but treatment and management strategies can be aimed at reducing symptoms and prolonging the life of the tree.

Treatment methods include:

– Spray Application

– Soil Application

– Trunk Injection

Some of the following plant health care treatments for insects require specific timing for proper control: