The mosquito season has started in earnest. Of course mosquitoes aren't pleasant to begin with, but throw in the West Nile Virus, and many people are rightly concerned about West Nile Virus and how to control mosquitoes. For now, if you are using a program in stagnant water, with no fish, the wiggler stage is present and controls such as the B.t. israelae should be started. Also continue to remove development sites such as standing water, old tires, and other containers that hold water. The B.t. israelae can be applied to areas you can't drain, and it won't affect people, pets, or livestock.