MADISON, Wis. (WRN) — Aerial spongy moth treatments across the state will start in May.
Residents in eight western Wisconsin counties may hear loud, low-flying planes shortly after sunrise on certain mornings. The invasive spongy moth can defoliate trees, stress forests, and even reduce property values. Caterpillar skins can also irritate eyes, skin, and breathing. In May and early June, planes will spray a naturally occurring bacteria that kills the caterpillars. In June and July, they’ll apply a pheromone that disrupts moth mating.
Officials say both treatments are organic, biodegradable, and safe for people, pets, and wildlife. Exact treatment days depend on weather and moth development.