果树萌芽前后,往往是果树病虫侵染的源头,随着早春气温回升和果树开始萌芽,经过越冬期的病虫害便开始初次侵染或危害。同时有些农药的安全有效使用也必须选定 Before and after the fruit tree sprout, it is often the source of pest and disease infection in fruit trees. As the temperature rises in early spring and the fruit tree begins to sprout, the pests and diseases begin to infiltrate and endanger the initial infection or endangerment. At the same time, the safe and effective use of some pesticides must also be selected