Ips bark beetle can attack many conifers including spruce (left) and pine (right). They start feeding at the tops of the trees.
Landscape
Ips bark beetle on trunk of spruce, showing pitch ooze (left) and on closer view, exit holes (right).
European elm scale nymphs on the underside of a leaf (circled; left) and mature scales on the bark of a twig (right).
Old black pineleaf scales covering the previous (yellow) needles, and new (immature) scales settling on the emerging needles.
European elm sawfly larvae feed communally on the older foliage.
An adult lilac root weevil chewing the characteristic half-circle "notch" on a leaf edge.
Heavy infection of oak leaf blister on white oak.
Adult females of pine needle scale with their white egg sacs.
Oystershell scale lives up to its name in terms of the shape of each scale, as shown here on willow bark.
Sycamore plant bug nymph on underside of leaf.
Feeding damage from sycamore plant bug is very evident by July, as shown on this sycamore leaf.
Honeylocust plant bug nymph.
Damage to honeylocust foliage from plant bug feeding.
A young fall cankerworm caterpillar spotted on an elm tree.