Do you get Purple Martins up there? I grew up in a town that the local grade school Principal started a project of putting Purple Martin houses in many places around town. The farmers all got involved and also put them up. Within a few years the problem with many of the insects was eradicated.
The Eastern Shore part of the state has beautiful Purple Martin “houses”. I don’t know if I have ever seen them in my region. However, I am now wondering if it is the type of thing where “if you build it, they will come?” I am more than willing to erect one of those houses in the front and backyard. Heck... I’d put them in the side yards, too.
I have barn swallows which are just as good as purple martins. In fact, the fact that I have barn swallows may be the very reason that the purple martins refuse to colonize here.
My research indicates that purple martins require a clean, apartment style bird house, or a series of hollow gourds hung on a pole. The bird house is mounted on a sliding pole that can be raised and lowered. The bird house has removable floors so that it can be cleaned out each winter. You should take the bird house down over the winter, or (at least) remove the floors in the compartments. Then, you have to watch for the "scout" martin in the spring. You immediately hoist the clean bird house up a pole (with the floors re-installed) and hope the "scout" bird spots it. He will then bring the rest of the flock back to move in. The trick is to get the martins in before sparrows move in. The two species will not live together.
I can't vouch for these instructions because they never worked for me. In contrast, you only have to leave your barn door open, or a window, to attract barn swallows; and supply open space to fly and a lot of insects for them to catch. They leave in the fall as quickly as they appeared in the spring. That's why barn swallows are easier!