The japonicus are very far from their old home in Asia, and scientists must race to understand how they'll behave here. DEET is effective for approximately four hours. Use sparingly to cover exposed skin and clothing. Vitamin B, ultrasonic devices, incense and bug zappers have not been shown to be effective in preventing mosquito bites. Mosquitoes lay their eggs in standing water.
Mosquitoes can enter homes through unscreened windows or doors, or broken screens.
Make sure that doors and windows have tight-fitting screens. Repair or replace all screens in your home that have tears or holes. Remove all discarded tires from your property. Dispose of tin cans, plastic containers, ceramic pots or similar water-holding containers. Make sure roof gutters drain properly.