The invention provides a method wherein a treating solution containing a compound of specific structure having a C10 to C22 hydrocarbon group at a concentration of 1 to 1000 ppm is applied at least once in a period of from germination of a fruit vegetable to planting in a field and applied at least once after planting in the field. The integrated circuit is provided for processing signals generated by the control means. The torque, which is to be monitored, is compared to a permissible torque. The support element includes a plurality of struts, preferably having a thickness of 100-150 micrometers. Also disclosed are various apparatus and vapor engines that utilize the heat transfer medium and to generate electrical power or motive forces.