B from St. Cloud, Mn writes
Each Mosquito Dunk will last roughly 30 days or until the briquett is dissolved completely. The Talstar will last anywhere between 30-60 days outdoors and 90 days indoors. The outdoor residual will all depend on the weather conditions and environment in your area. Please let us know if you have any other questions.
Answer last updated on: 06/11/2013