1, "three gray" pest control law. Ash is the plant ash, lime, coal ash. Pour the sun-dried seeds into the tank, do not fill it (approximately 2 inches), lay 2-3 layers of paper on top, and then fill the paper with dry grass ash or lime, coal ash, cover and save. It can be insect-proof and moisture-proof, and it is economical and effective. 2, cryogenic freezing method. Pests die at temperatures below 0°C for a certain period of time. For example: -13 °C low temperature for 7 days, can kill all moth eggs; -15 °C low temperature for 12 hours, you can kill the Ottomans, rice bran, soybean meal and other adults. Therefore, in the winter or early spring in the afternoon to remove the seeds, frozen for a day and night, and then sifted or swept after picking cold collection, can achieve the purpose of killing insects. 3, pressure top method or shift top method. Mainly used for controlling wheat moths. The wheat moth enters the warehouse as the wheat is harvested, mainly in the surface of 20 cm. Immediately before the emergence of the first generation of moths, the seed glands were closed and the moths that had emerged within the seeds could not move and die. The glands should use insect-free material or other seeds (such as beans) that are not harmed by moths. It is also possible to remove the wheat from the epidermis to bring out the insect pests in the seeds. The method of removing the top of the seed is usually performed in two stages. Each time the surface layer is thickened. China Agricultural Network Editor
