Identify and Manage Outdoor Insects

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Updated: October 13, 2021

Predatory Bugs

Predatory bugs are in the insect order Hymenoptera and use piercing-sucking mouthparts to kill their prey.
wheel bug
Updated: October 1, 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: September 30, 2021

Brown Marmorated Stink Bug - Frequently Asked Questions

Answers to common questions about brown marmorated stink bugs
Updated: September 30, 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: September 24, 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: September 8, 2021

European Hornets

The European hornet is the only true hornet in the United States. The notches on the abdomen distinguish it from the Asian Giant Hornet ("murder hornet"), which is not present in Maryland.
European hornet
Updated: August 13, 2021


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