From the wonderful obit site Life in Legacy:
Kay Kuter, character actor best remembered for his long-running role as farmer Newt Kiley on the CBS sitcoms “Petticoat Junction” and “Green Acres,” who was born to show business—son of pioneer motion picture art director Leo “K” Kuter and screen actress Evelyn Elder—died Nov. 12 of pulmonary complications Burbank, CA, at the age of 78.