Have used these for years in our swamp
Shipping from this vendor took far too long, summer was about over, but these work. They use a bacteria that only activate when in water and travel along surface. They only effect baby mosquitos when they are living in water and are no harm to anything else including humans (unlike mosquito sprays). When mosquito larve ingest, they basically implode. Not even dragonflies who eat them are effected by it. Read directions on how mush surface area a dunk will treat. Place a dunk in any standing water. No big deal if it dries up. It will work again if water pools there again.
Rating: 5 stars