Host Plant: Boxwood Psyllid Damage: Cupping and curling of new terminal leaves. Young leaves curl, cup, and turn yellow creating a protective pocket for the nymphs. Nymphs create a white, cottony-like, waxy secretions on the leaves. This damage is noticeable in the...
HOST PLANTS: Found mostly on the Butternut (Juglans cinerea) but other members of the walnut family may also be affected. All naturally occurring Butternut trees of any age and size are protected in Ontario whether or not they are infected with Butternut Canker, but...
Host Plant: All native and introduced Birch (Betula) species in Canada. Damage: Adult bronze Birch borers feed on leaves in the upper canopy causing little noticeable damage. The larvae create feeding galleries under the bark with in the phloem and xylem of the...
