进入冬季后,对果树树干刷上涂白剂,可有效地避免冻害,并杀死在树干上越冬的病虫。1.防冻冬季冻害、尤其是霜冻、由于冷空气下沉,树干受冻首当其中。生产中人们发现,树体温差大或温度前后变幅大,冻害往往严重。因此,冬天刷白树干,晴天可反射太阳光,减少晴天吸收的太阳热,缩小冻 After entering the winter, brush the tree trunk whitener, which can effectively avoid frost damage and kill pests on the trunk of the winter. 1. frost winter frost damage, especially frost, due to the cold air sink, the trunk of the first by the cold. People found in production, the tree body temperature difference between the large or large amplitude, frost damage is often serious. Therefore, the winter brush white trunks, sunny days can reflect the sun, reduce the sunny day to absorb solar heat, shrink frozen