Dan from Taylor, Michigan writes
You should start applying Arena .25 Granules per the product label: For preventive applications: Make applications through peak egg hatch of target species. Use the upper end of the rate range if application is made 60 days or more prior to peak adult flight and/or egg lay. Treatment Applications: For applications after egg hatch or when obvious turf damage has occurred use the upper end of the rate range.
Most people are able to recall what month they have noticed damage in the past and they start making application a couple of weeks before that. For more specific timing you should call your local cooperative extension office as they will be able to narrow down the timing in your area.
Answer last updated on: 10/14/2019