Black Flag Liquid Fogger 20The Black Flag 190095 Propane Fogger is small, lightweightand easy to operate with no electricity required. The secret to fogging is in the microscopic particles it produces, up to 7 times finer than mist. When applied before dusk or dawn, the fog floats and penetrates deep into landscaped areas where mosquitoes hidekilling on contact and creating a mosquito free zone that lasts up to 6 hours. Foggers give you immediate, effective, long lasting