Aphids are small, softbodied sucking insects which pierce plant tissues and draw out the juices

Bagworms are the larval (caterpillar) stage of a moth that is rarely seen.

These fungi overwinter in infected dead needles, twigs and cones either on the tree or on the ground.

The dark grub-like larvae chew on the underside of leaves but avoid the larger leaf veins, producing a type of injury pattern known as skeletonizing.

Iron chlorosis is a yellowing of plant leaves caused by iron deficiency, usually in high pH soils (pH above 7.0).

A fatal disease of exotic pines in the Midwest

Twospotted spider mites are tiny, oval, eight legged creatures about 0.4mm long.

The lilac borer is a clearwing moth with a single generation per year whose larvae bore within the trunks of lilac and ash.

This disease attacks susceptible cultivars of apples & crabapples.

This causal fungus infects and kills needles.

Fireblight is a destructive, highly infectious, and widespread disease caused by the bacterium Erwinia amylovora.

Scale insects are sap-feeding insects that derive their name from the shell-like waxy covering that conceals their bodies.

Rhizosphaera needle cast is a fungal disease of spruce trees that causes needles to turn brown and fall off.