Delaware Pest Library

Subterranean termites swarm in spring. A must-check before any home sale.

Move inside as nights cool. Droppings and gnawing are the first signs.

Odorous house ants and carpenter ants lead spring kitchen calls.

Gather on sunny walls in fall and slip in around windows.

Hitchhike in luggage. A year-round risk for rentals and travelers.

German roaches live indoors year-round; American roaches come in from outside.

Yellowjackets get aggressive in late summer. Don’t disturb ground nests.

Mostly harmless and helpful. Know the two that aren’t.

Ride in on pets and wildlife. Humid summers make them worse.

Big bees that drill round holes in bare wood eaves, doors and decks in spring.

Black-and-red bugs that cluster on sunny walls in fall and wander indoors.

Indian meal moths and flour or grain beetles in cereal, flour, pet food and birdseed.

Humpbacked, wingless jumpers that hide in damp basements, crawl spaces and garages.

Salt marsh and backyard breeders. Worst near standing water and the coast.

Deer ticks carry Lyme. Found in tall grass, leaf litter and wooded edges.

Invasive planthopper spreading south. Report and destroy egg masses.

Invasive tick found in New Castle and Kent counties. Rarely bites people; hard on livestock.

Biting flies of salt marsh edges and summer woods. Only the females bite.