Abstract: A device and method for generating cyclopropene gas comprising bubbling a gas through a vessel that contains water. A cyclopropene/cyclodextrin complex is added to the water to form an aqueous suspension. Cyclopropenes are used to inhibit the ethylene response in plants and plant products, such as fruits and vegetables. The device of the invention may treat small volume facilities as well as very large volume storage facilities, such as warehouses and the like. The bubbled gas rapidly and completely liberates the cyclopropene gas from its cyclodextrin carrier to provide a cost effective and efficient treatment against the ethylene response in plants.