The answer to 'when to treat for mosquito control' is to treat for mosquitoes during the spring, summer, and early fall months when mosquitoes are most active. Mosquitoes breed in standing water, so it's important to treat areas around your home where water can collect, such as gutters, birdbaths, and flowerpots.
The best time to treat for mosquitoes is in the early morning or evening hours when they are most active. Professionals can assess your property and recommend the most effective treatment methods, which may include applying insecticides, using traps, or eliminating standing water sources.