Cucumber cultivated in open field sometimes has no luster and produces a white powdery cream on the surface. This phenomenon is commonly known as "frosting fruit." Cucumber bloom is a physiological disease. The reasons are: the cultivation land is too shallow, the roots are shallow, and the absorption force is not strong; the cultivated land is large in sand, the soil layer is too thin, and the nutrient supply is insufficient; the cucumbers grow late in the growth period, and the root absorption capacity decreases; the pests and diseases are serious, Aging of plants; continuous plots, malnutrition; temperature, nighttime temperature is too high; continuous cloudy, lack of sunshine. Due to the above factors, the nutrient production of the plant is reduced, and the respiration is enhanced, resulting in insufficient respiratory consumption and suppressed, and waxy substances are produced on the peel.