On August 20, 2008, at 1300 central daylight time, a Cessna A188B, N53243, collided with a ditch during takeoff from a private airstrip in Camanche, Iowa. The commercial pilot was not injured. The airplane received substantial damage. The aerial application flight was operating under Title 14 Code of Federal Regulations Part 137. Visual meteorological conditions prevailed and no flight plan was filed. The local flight was originating at the time of the accident. The pilot stated that during the takeoff run the airplane became airborne when it contacted a "hump" in the grass airstrip. He stated he attempted to keep the airplane airborne, but it settled back onto the airstrip where it contacted a "washed-out" rut that crossed through the middle of the airstrip. This resulted in the right landing gear being sheared off the airplane and the left landing gear collapsing rearward. The internal airframe structure was damaged at the gear attach points. The pilot stated he was aware of the condition of the airstrip prior to the takeoff.