Summer Pests

With the change of seasons, comes the changing cast of pests. For more information on these pests, check under the insect links. All of the following pests are able to overwinter in homes.

These are some of the main culprits on the ‘pest parade’ for this season.


Paper Wasps

Paper wasps which over winter in your attics, walls and soffit areas become active with the first warm days of April and May and activity continues on the outside of the house throughout the summer into late fall.

The European paper wasp is a fairly recent introduced species and had become more numerous than our native paper wasp. It’s numbers were reduced over the past several years by two harsh winters in a row. We noticed the native paper wasp becoming more numerous towards the end of last summer, and have been very active this spring

Yellow Jackets

Over wintering queens begin new nests each spring. Their nests can be in trees or shrubs, on the sides of walls, in walls or attics of homes or in the ground. The nest starts off as very small and is easy to treat at this stage. By late summer they can become as large as soccer balls and are much more hazardous to deal with.

Bald faced Hornets

Like yellow jackets, nests are started each spring by an over wintering queen. They prefer to build their nests in trees or shrubs but can build them on walls under soffits or in attics.

Carpenter Bees

Carpenter bees become active in the first warm days of spring and their activity continues into the summer. They bore small round holes into wood surfaces of homes. Extensive damage can be done by hairy woodpeckers which open up the holes that the bees make to find the larvae & pupae of the carpenter bees.

Mud dauber Wasps

These wasps can be black or metallic blue and build mud tubes or small roundish mounds of mud on the walls or under the soffits or in the attics of homes. They are active all summer.

Carpenter Ants

Carpenter ants become active in homes in early spring and activity may continue into early summer. Activity of these ants in early spring indicates that the colony is located within the structure of the house. Look for activity on the outside of the house in warm weather.

Small Ants

Small ants are one of the most common pest problems in homes and other structures. These ants generally originate from outside around the building. The entire colony can move into the home through small cracks or weeper holes.

Wood Roaches

Wood roaches are familiar to those who spend time in cottage country. They are a native insect that lives outdoors behind bark and in rotted logs etc. Unlike roaches such as the German roach they prefer to live outside. Occasionally they will get into the house but will not usually establish a major infestation inside.

We are getting numerous calls from home owners with bugs they can’t identify that turn out to be wood roaches. It seems that they have become established in this area. If they become a nuisance inside a good thorough outside treatment is usually sufficient to keep them out.

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