According to the accident pilot, the agricultural airplane was loaded with 120 gallons of product and the fuel tanks were half full. During the takeoff roll about one-third down the runway, he airplane encountered a gust of wind. The airplane veered left and exited the runway into tall grass. The pilot attempted to maneuver the airplane back to the runway to continue the takeoff. The airplane collided with a barbed wire fence and rotated 180 degrees. The responding Federal Aviation Administration inspector reported the airplane sustained substantial damage to the wings, fuselage and empennage. The pilot reported that the airplane had no mechanical malfunctions or failures and the engine was producing power.