Plant pests and diseases kill millions of trees, both in our neighborhoods and in natural areas. This damage has a negative impact on vital ecosystem services like clean air and water and costs billions of dollars in cleanup and lost revenue.

Explore this website to learn about the impact, life cycle, host species and symptoms of threats like the Asian long-horned beetle, emerald ash borer, laurel wilt, ramorum blight, and thousand cankers disease as well as tips on how to report and help prevent the spread of these threats.