Abstract: A machine for applying and retracting a protective covering to agricultural plants is disclosed. The implement (10) is supportively attached by forward and rearward attachment mechanisms (12, 14) to a tractor (16) and movably supported additionally by a coaster wheel (18) laterally spaced from the tractor (16). Vertically-oriented supports and rearward attachment mechanisms (12, 14) and front attachment to wheel (18) to support a horizontally-oriented, substantially-rectangular frame (26). A rotatable shaft mechanism (28) attached to a universal joint (108) is supported at the ends by shaft supports (30, 32) which extend upwardly from the rearward portion of the frame (26). A shaft mechanism (28) is driven by a hydraulic motor (34) which receives controllable power from tractor (16).