Agtech startup Rantizo, primarily known as a drone spraying service for row crop farmers, is launching stadium and sports arena drone spraying services to help large-scale event vendors with sanitization efforts, the Iowa City company announced this week. Sports organizations or open areas needing to be sanitized will be charged an initial setup fee, as well as a per-unit price determined by area or number of seats. After a location is mapped, repeated applications can be made in between events, Rantizo said in a statement. More information can be requested online.