Did you know a single bottle cap full of water is enough for a mosquito to lay up to 300 eggs? Insane, but true! Think of all the places around your home that could be holding water. This is a breeding ground for mosquitoes. Eliminating standing water by dumping it out is going to reduce the number of mosquitoes around your home. When treating your home for mosquitoes, you can also use products called insect growth regulators, or IGRs. This product will be carried back to standing water sources and interfere with the breeding cycle causing colony elimination. Hope this helps!