August evenings in Oswego are worth defending. The low, shaded ground holds its damp all day under the big old maples along the streets near Main, and the moment the heat finally lets go, the mosquitoes find the patio and the night is over before it started. Zenitram Landscaping & Mosquito Services tends both halves of a yard — the green underfoot, mowed and trimmed and edged clean, fed and kept ahead of the weeds through a growing season that runs hot and fast here, and then the air above it, treated where the standing water and deep shade let mosquitoes wait out the sun. What they are really handing back is an evening. A porch worth sitting on, a lawn that looks handsome in the low gold light, and nobody going inside until the fireflies come up and the last of the day drains off west toward the river.