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.
Download our spring checklist to prepare your trees and landscape for a healthy growing season.
If infestations continue, spruce spider mites may kill tree branches and possibly lead to tree death. Save your trees from these pests with the following tips.
White, tan, or rust colored resin flowing on the trunks of austrian, scots and red pines could indicate an infestation of Zimmerman Pine Moth (ZPM) caterpillars.
The southern pine beetle is one of the most destructive insects to pine in the South and Southeast with the ability to rapidly kill large trees.
The Cytospora canker is caused by a fungus that primarily attacks trees that have been weakened by drought, low fertility, mechanical injury, insect feeding or poor soil conditions.
This disease causes holes in the leaves which start as brownish spots them dry and fall out.
Caterpillars feed on the leaves of oak trees and other species. Found on the Pacific coast.
Causes severe damage to forests and landscape pines, discoloring needles and eventually defoliation.
The California oakworm is one species of caterpillar that feeds on oak trees.