Five most common pests and diseases
These five are just the most prevalent of the 400 or more insects and diseases in North America deemed threats to urban trees. Of that total, between 20 and 30 are deemed significant threats.
What coming to your community
To combat what shows up – or may show up – in your community, you need solid information on what’s coming and from where. Fortunately, federal agencies and most states monitor and track forest pests and disease.
National sources
US Forest Service Pest Maps
Annual Forest Insect and Disease Conditions Reports have been published annually since 1955, identifying the then-current status of and changes to the most significant forests pests and diseases. Reports provide a national summary of conditions on all ownerships.
Alien Forest Pest Explorer
A joint project of the USDA and Purdue University, the AFPE tracks the location of a select group of pathogens. Information is localized to enable use in county planning.
State and local resources
The most comprehensive list of organizations and resources tackling invasive pests and diseases at the local, state and multiagency level. Here you can locate primary state agencies and councils, along with reports on response and mitigation for current hazards.