Incident Overview
A pilot conducting aerial spraying as part of a federally sponsored boll weevil eradication program struck unmarked power lines during a final pass. According to the pilot and a witness, the aircraft was flying south while trimming the edge of a field when the right wing contacted power lines situated at 80 feet above ground level (agl).
Sequence of Events
The pilot intended to complete the trim pass beneath overhead power lines. However, the aircraft's right wing struck the unmarked lines. Following the impact, the airplane hit the ground, resulting in the wings separating from the airframe. The aircraft came to rest in an inverted position.
Pilot Statement
The pilot reported that the trim was intended to be accomplished beneath overhead power lines. The power lines involved were not marked.