Is it true that the white frost on grapes is actually pesticide residue? Don't buy grapes with too much white frost on them? What is the white frost on grapes and blueberries? Can I eat it? In this regard, the monthly "scientific" rumor list guided by the Beijing Association for Science and Technology, the Beijing Municipal Committee Cyberspace Office, and the Capital Internet Association gave an explanation. In fact, grapes, blueberries, plums, and other ripe fruits will have a layer of white frost on their surface. This is the fruit powder produced by the fruit itself, which belongs to the sugar alcohol substance and is evenly distributed on the surface of the fruit. It is insoluble in water. It is not only non-toxic, but also has certain nutritional value. To some extent, wearing white frost is a sign of fresh grapes. Of course, if farmers spray pesticides during grape growth, there will also be a faint layer of white frost. To distinguish whether the white frost on the surface of grapes is natural fruit powder or pesticide residue, the method is simple: natural fruit powder is naturally evenly distributed and does not cover the color of the grape skin itself, but only makes the grapes look more beautiful; However, the distribution of pesticide white frost is uneven, and there may also be droplet shaped pesticide spots. (New Society)