Tree Insects

Many different caterpillars could be eating the leaves of shade trees.

Wooly aphids produce a fluffy white waxy substance on new shoots of crabapple and other trees in the rose family.

You won't see these small black weevils unless you go out with a light at nighttime. They cause classic notching damage on the edges of leaves.

Lace bugs hide on the underside of leaves of mostly azalea, Pieris, and rhododendron evergreen shrubs.

Corky swollen or unusual growths on tree leaves or branches can be caused by mites, bacteria, fungi, or other insects. They are unsightly but not life-threatening.

Beetle borers and bark beetles may be the reason gummy sap is oozing from tree branches or trunks.

There are multiple bark beetles that may cause damage to needled evergreen trees.

Caterpillars of spongy moths are a serious pest of oak trees in Maryland.

Larvae or grubs feed on the roots of Kentucky bluegrass, fine fescues, and other grasses. Adults are brown beetles with metallic green heads that emerge mid-June and feed on more than 275 plant species.

Aphids are small green insects that suck plant juices from almost all plants at one time or another.