Identify and Manage Outdoor Insects

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Updated: July 15, 2021

Spotted Lanternfly Management for Residents

Spotted lanternfly (Lycorma delicatula) is an invasive sap-feeding insect native to eastern Asia. It was first detected in Maryland in 2018.
spotted lanternfly side view
Updated: July 14, 2021

Asiatic Garden Beetle

What are the medium brown beetles drawn to outdoor lights on summer nights?
Asiatic garden beetle
Updated: July 12, 2021

Orange Aphids on Milkweed

Oleander aphids, (Aphis nerii) are little orange insects that commonly infest milkweed plants.
orange oleander aphids on swamp milkweed
Updated: July 7, 2021


The emergence of Brood X of the 17-year periodical cicadas will occur in the spring of 2021. This page covers the biology and behavior of cicadas, what to expect during the cicada emergence, and how to protect young trees from egg laying damage.
periodical cicada
Updated: June 14, 2021

Carpenter Ants

Carpenter ants are large dark insects that can sometimes become a problem in the home. Unlike termites, they do not feed on wood but cause damage by creating nests in damp or moisture-compromised wood. 
black carpenter ant
Updated: June 14, 2021

Earwigs on Flowers

Earwigs are commonly found inside and outside of the home and are easily recognized by the pair of pincers at the tip of the abdomen.
earwigs on zinnia
Updated: May 27, 2021

Asian Longhorned Beetle

Asian longhorned beetle (ALB) is a very serious exotic insect pest that was introduced in solid wood packing material from China. It is known to attack 29 species of deciduous hardwood trees.
asian longhorned beetle
Updated: May 25, 2021

Carpenter Bees

Carpenter bees are important pollinators, they are not aggressive, and controlling them is not necessary unless they are damaging wooden structures. 
carpenter bee on a flower
Updated: May 12, 2021

Emerald Ash Borer (EAB)

Emerald Ash Borer (EAB) is an exotic invasive insect that is a serious threat to Maryland ash trees. It has killed many millions of ash trees across the Mid-West and Eastern U.S.
emerald ash borer
Updated: May 11, 2021


Chiggers are a tiny larvae of mites in the genus Eutrombicula. Their bite causes intense itching.
chigger mites