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Tree Insects
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Tree Insects
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Updated: February 28, 2023
Caterpillars on Trees
Many different caterpillars could be eating the leaves of shade trees.
Updated: February 28, 2023
Woolly Aphids on Trees
Wooly aphids produce a fluffy white waxy substance on new shoots of crabapple and other trees in the rose family.
Updated: February 28, 2023
Weevils on Trees and Shrubs
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.
Updated: February 28, 2023
Lace Bugs on Trees and Shrubs
Lace bugs hide on the underside of leaves of mostly azalea, Pieris, and rhododendron evergreen shrubs.
Updated: February 28, 2023
Tree and Shrub Galls
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.
Updated: February 28, 2023
Borer Insects on Trees
Beetle borers and bark beetles may be the reason gummy sap is oozing from tree branches or trunks.
Updated: February 28, 2023
Conifer Bark Beetles on Trees and Shrubs
There are multiple bark beetles that may cause damage to needled evergreen trees.
Updated: February 28, 2023
Spongy (Gypsy) Moths and Caterpillars on Trees
Caterpillars of spongy moths are a serious pest of oak trees in Maryland.
Updated: February 27, 2023
Japanese Beetles on Trees, Shrubs, and Flowers
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.
Updated: February 27, 2023
Aphids on Trees and Shrubs
Aphids are small green insects that suck plant juices from almost all plants at one time or another.
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