European ash is a significant tree commercially, ecologically, and culturally. It is currently
threatened by two invasive species, the fungus that causes ash dieback and

Oak decline is a slow-acting disease complex that involves the interaction of biotic and abiotic factors such as climate, site quality and advancing tree age.

Interception of potential invasive species at ports-of-entry is essential for effective biosecurity
and biosurveillance programs. However, taxonomic assessment of the immature stages

Ice or snow loads can cause branch breakage or failure of entire trees and shrubs. Branches or entire trees that fall in storms can impact homes, vehicles, power lines and block roads.

• Many exotic plant pests and pathogens are unknown prior to their establishment, making prevention and management difficult.

The invasive hemlock woolly adelgid (HWA) has decimated hemlock stands across much of the eastern United States, and presents a significant threat to all eastern hemlock in Canada across Ontario, Quebec, New Brunswick, Nova Scotia, and Prince Edward Isl

Insect and disease infestations pose major threats to several North American forest tree species.

The purpose of this document is to assist anyone planning and programming the management of invasive species on islands, with the aim of reducing the negative impacts of invasives on islands’ rich and fragile natural heritage, communities and livelihood

The Plants for Planting Manual provides the background, procedures, and reference tables for regulating imported material of plants and vegetative parts that are for or capable of propagation, including buds, bulbs, corms, cuttings, layers, pollen, scio

The purpose of these guidelines is to provide recommendations to farmers, conservation districts, USDA Natural Resources Service (NRCS) field office staff, and other agricultural professionals, when designing and installing habitat features for benefici