How to kill insects without pollution when storing grain?

How to kill insects without pollution when storing grain? Please introduce the method of high temperature insecticidal method when storing grain. The general stored grain pests can endure high temperature of 35-40 ℃. Under the condition of 46-48 ℃, the pests can be killed for a long time, while above 50 ℃, most pests will die in a short time. High temperature insecticidal generally requires a temperature above 46 ℃. The following methods are often used to kill insects at high temperature. 1. Sunlight exposure. In the high temperature season, the hot field is exposed to the sun, and the thin stall is turned frequently, generally for 4-6 hours, the grain temperature reaches more than 46 ℃, and the killing effect can be guaranteed by keeping it for 2 hours. However, the moisture content in the warehouse should be controlled below 12%. 2. Killing insects by mechanical heating. Heating and drying machines such as curing tank dryer, drum dryer and tower dryer are used to heat the grain for 33-60 minutes, so that the grain temperature is heated to 50-55 ℃, then out of the machine, slow for 1-2 hours, and then ventilated and cooled, all the young and adults can be killed. If you slow down for 4-6 hours, you can kill the eggs. 3. Kill silkworms and pea elephants with boiling water. First, put the grain in the turnip basket, soak it in boiling water together with the basket, and constantly stir the beans. After 28-30 seconds, put the basket immediately, put it in cold water for cooling, and then spread it out to dry so that the moisture is reduced to less than 12% before storage. Click to get more pesticide application techniques