Using aerosol insecticide to control mosquitoes is a scorched earth strategy. These chemicals don’t just target mosquitoes. They kill just about all insects they come into contact with, including pollinators and other beneficial insects. It is more effective to control mosquito populations at the larval stage. In addition to dumping all standing water to eliminate mosquito breeding locations, we can add larval traps to our patios and yards. Larval traps contain water; straw, hay, grass, or leaves; and Bti (the ingredient in Mosquito Dunks or Bits). Bti is a selective insecticide – it targets mosquito larvae but not other wildlife. Females lay eggs in the water, and the larvae that emerge are killed. Join Extension Master Gardeners for a demonstration on how to make a DIY larva trap sized for patios and balconies, May 28, at the Small Space Garden, any time between 9 and 11 a.m.