Asian Citrus Psyllid

This little insect causes a disease that threatens citrus trees.

Asian Longhorned Beetle

Eastern hardwoods are being seriously affected by this destructive beetle.

Emerald Ash Borer

One of the country’s most valuable woodland and landscape trees is being devastated.

Japanese Beetle

Introducing one of the most serious garden pests east of the Rockies.

Hemlock Wooly Adelgid

Hemlock forest and landscape trees are being attacked by this invasive insect.


Though tiny, this is a serious threat to landscape and edible plants.

Featured Articles

Looking for more information about diseases that affect trees in your area?
Learn more about sudden oak death and thousand cankers disease.

Information provided April 2015, courtesy of the Bayer Advanced Healthy Trees for Life initiative. Bayer®, the Bayer Cross® and Bayer Advanced™ are trademarks of Bayer. is designed to provide nonbiased information to the general public with no intended endorsement of specific products, companies or services. Questions related to cultural practices and issues not specifically covered by should always be referred to your local Cooperative Extension office, Certified Arborist, or local Nursery Professional.