Mosquito Dunks® from Summit® provide a safe, non-toxic way of controlling mosquitoes before they become flying, biting, disease-carrying adults. They are also approved for organic production and gardening. Mosquitoes have always been an annoying and sometimes deadly aspect of summer and with the recent spread of dengue there has been a heightened interest in mosquito control throughout Singapore and the region. Homeowners, ranchers and farmers looking for a safe, non-toxic way to control mosquitoes can use Mosquito Dunks®, which are very safe for use among children, pregnant women and other living organisms including plants and marine life. The active ingredient in Mosquito Dunks® is Bacillus thuringiensis subspecies israelensis (BTI). BTI is a bacterium that is deadly to mosquito larvae but harmless to other living things. There are approximately 2,500 species of mosquitoes throughout the world. The BTI in Mosquito Dunks®effectively kills the larvae of all species of mosquitoes.