We decided to try Cedarcide products to control a chigger problem in our small, well manicured back yard.  After applying the PCO concentrate with a hose-end sprayer, spreading a couple bags of "granules" (which is actually just cedar sawdust) as well as spraying our two small dogs generously with the Best Yet spray, then repeating the abover regimens three additional times over the span of one week (with no rain fall), we STILL have chiggers and have seen no improvement at all.   I might also add that even after spraying my legs until shiny wet with the Best Yet spray, two mosquitos landed...