Our arborist advice section is the most extensive expert collection of tree, lawn and landscape care tips and educational resources that you will find anywhere.
Follow our winter checklist to keep your trees and landscape healthy by identifying potential issues.
This species is an armored scale with a hard, waxy covering. It damages hemlock needles by inserting needle-like mouth parts into leaf tissue and removing cell fluid.
Most Ips beetle problems occur on newly transplanted pines or plants under stress. Prolonged drought can increase Ips beetle infestations.
In this episode of Talking Trees, Davey Expert and ISA Certified Arborist Jim Houston discusses Diplodia Tip Blight and ways to prevent damage to your pine trees.
Davey expert Jim Zwack discusses the emerald ash borer, from identification to flexible treatment options that are now available and may protect your ash trees.
Anthracnose is a leaf disease of shade trees, specifically ash, maple, oak and sycamore.
Emerald Ash Borer: Plant Health Care Tips. The emerald ash borer represents a significant challenge to our urban forests and our backyards.
Coalition for Urban Ash Tree Conservation: Emerald Ash Borer Management Statement. Emerald ash borer has killed millions of ash trees since its discovery in 2002 and the number of dead ash is increasing rapidly. Ash species are abundant in planted and natural areas of urban forests, representing 10 - 40% of the canopy cover in many communities.
A fungus that discolors spruce needles and causes premature drop, especially in overly wet conditions.