Mosquito season does not start on a single date — it builds gradually as temperatures rise above 50°F and standing water accumulates from spring rains. The most effective mosquito control strategies are implemented 4–6 weeks before peak season, not after mosquitoes are already biting. This guide provides a week-by-week preparation plan.
Eliminating standing water removes 80% of your mosquito problem without any chemicals. Mosquitoes need as little as one tablespoon of stagnant water to complete their 7–10 day larval development cycle.
Walk your entire property and dump, drain, or cover: flower pot saucers, bird baths (refresh weekly), clogged gutters, old tires, buckets, wheelbarrows, tarps that collect water, children's toys, pet water bowls (refresh daily), and any container that holds water for more than 5 days.
The Asian tiger mosquito — the most aggressive daytime-biting species — breeds preferentially in small, dark containers near homes. It does not need ponds or ditches. A forgotten bottle cap in your yard is enough.
For water features you cannot drain — ornamental ponds, rain barrels, drainage ditches, tree holes — apply Bti (Bacillus thuringiensis israelensis) larvicide. Bti is a biological larvicide that kills mosquito larvae specifically without harming fish, birds, pets, or beneficial insects. It is certified organic and considered the safest mosquito control product available.
Bti dunks last approximately 30 days. Bti bits provide faster knockdown (24 hours vs 48) but need reapplication every 7–14 days. Use both: dunks for season-long control and bits for immediate treatment of active breeding sites.
See our complete guide: How to Treat Standing Water for Mosquitoes.
Repair or replace all window and door screens. Even small tears allow mosquitoes entry. Standard fiberglass screening (18×16 mesh) blocks most mosquitoes, but if you deal with no-see-ums or very small species, upgrade to 20×20 mesh.
Consider adding screen to porches, patios, and outdoor dining areas if mosquito pressure is severe in your area. Outdoor fans also provide meaningful protection — mosquitoes are weak fliers and cannot navigate winds above 5 mph.
If your property borders woods, wetlands, or has persistent mosquito pressure despite eliminating breeding sites, a perimeter barrier spray is the next step. Bifenthrin or lambda-cyhalothrin applied to vegetation, under decks, and along fence lines kills resting adult mosquitoes and provides 30–60 days of residual protection.
Timing matters: Apply in early morning or late evening when pollinators are inactive. Never spray flowering plants directly. See our complete yard mosquito treatment guide.
For personal repellents, DEET (20–30% concentration) remains the gold standard with 6–8 hours of protection. Picaridin (20%) is equally effective, less greasy, and does not damage plastics. Permethrin-treated clothing provides excellent protection — treat pants, socks, and shoes for tick and mosquito prevention during outdoor activities.
For a detailed comparison, see our mosquito repellent comparison guide.