Thailand's export fruit is one of the leading money-income. data from the Department of Trade Ministry of Commerce, 2557 Thailand has exported fruits worth up to 32,793.60 million baht. There are a lot of exports each year, compared with industrial products. in the quarter 1 / 2558 is worth 232.9 million USD. But Thailand still faced problems of quality fruit. Because the post harvest management is poor. Make it easy to access the destruction of microbes. And physiological changes that occur faster than normal. To prevent and slow the deterioration of the quality of fruit export. the most popular methods used for handling produce after harvest. The heat treatment after harvest. Include hot water, vapor heat, forced hot air Prevent or eliminate microorganisms that cause plant diseases. Pesticides that come with the product. Reduce the abnormal way in Physiology, produces a harvest. Increase the efficiency of pesticide some microbes that cause plant diseases. Inhibit the growth of bacteria and Induced resistance.