What happened
Prior to departure, the pilot performed a series of pre-takeoff checks, including inspections of the magneto, propeller, and engine instruments. During the takeoff roll on a 2600' x 40' grass airstrip, the aircraft's tail lifted approximately 800 feet down the runway. At this point, the pilot noted that the aircraft felt underpowered.
To assist with lift, the pilot extended full flaps, which allowed the airplane to become airborne. While remaining in ground effect, the pilot retracted the flaps and proceeded to verify the settings for the throttle, propeller, and mixture controls. The aircraft continued flying for approximately 1000 feet; however, the pilot was unable to increase airspeed or climb in altitude.
As trees approached the flight path, the pilot executed a maneuver to the left and dumped the aircraft's load of chemicals. During this maneuver, the airplane entered a stall and impacted the ground. There were no injuries reported.