 Howard's books are useful coast-to-coast and border-to-border. You can learn about these helpful books by clicking on Howard's Books button on the top of his homepage of DirtDoctor.com. Mosquitoes can transmit deadly diseases, including West Nile virus and EEE. But Summit Mosquito Dunks kills mosquitoes before they are old enough to bite. Just float an organic mosquito dunk in ponds, bird baths, rain barrels, and any standing water to kill mosquito larvae for 30 days or longer.