The commercial pilot reported that during an aerial application flight, he sprayed a row on the field and climbed to avoid wires on the south side of the field. He then made a right turn and began his descent back to the field. After he cleared the wires, he entered the field on the spray line and began raising the collective. He noticed that the torque gauge was responding, however, the rate of descent was not being halted and the helicopter subsequently impacted the ground and came to rest on its right side.

The helicopter sustained substantial damage to the fuselage.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation.