Forestry Pests and Diseases

A new and deadly insect pest that kills trees by boring holes in the trunk. It affects maples, horsechestnuts, poplars, willows, elms, mulberries and black locusts.

Extensive resource on forest insects and related topics.

This site provides information about Dutch elm disease and ELMguard - a new experimental preventative treatment being developed at the University of Toronto, Faculty of Forestry.

Fire blight is a bacterial disease that affects apple trees, pear trees and rosebushes. It is caused by a bacteria "erwinia amylovora" which attacks the blossoms or flowers moving up to the twigs and then the branches.

Quality photographs of forest insects and disease organisms. Contains image search or browse by categories.

The gypsy moth is a serious threat to trees including maples, oaks and elms. Caterpillars feed on leaves, weakening the tree.

Oak wilt is a devastating fungal disease that attacks red oaks, white oaks and live oaks of North America. Learn how you can identify and control this oak tree disease.

Oak wilt is a devastating fungal disease that attacks red oaks, white oaks and live oaks of North America. Learn how you can identify and control this oak tree disease.

Oak Wilt Prevention and Treatment, Oak Wilt Analysis, Alamo Fungicide Sales, Oak Wilt Root Trenching

Powdery mildew is a fungus that attacks the leaves of various plants including poplar and willow trees and roses.

The Eastern tent caterpillar affects black cherry trees and other fruit and shade trees. The forest tent caterpillar infests hardwood trees such as sugar maple and oak.

Care of trees and plants, treatment of diseases, insects, malnutrition and other pathologies with fertilizer, mycorrhixae, biostimulants and microinjection. Online ordering of products and books, also lists of professional arborists and pertinent links.