The pilot reported that during an agricultural application flight, he was making spray passes under a power line. During the last pass, the left wing of the airplane struck the power line, and the airplane descended and impacted the ground. The pilot exited the airplane, and a postcrash fire ensued.

The pilot reported that he believed he encountered a dust devil which caused the left wing to rise and contact the power line. About the time of the accident, a nearby weather reporting station was reporting, temperature 90 degrees Fahrenheit and wind from 120 degrees true at 4 knots.

The pilot reported no preimpact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.