防治梨树病虫害是获得梨丰收的关键措施之一。我在三十年的实践中,经过精心观察,逐渐对梨树病虫害的发生和发展有了一些认识,摸索出一些防治的办法。一、梨树病虫害的一般规律在一年中,病虫害的发生、发展与气候变化有关。如果每年阴历正月下雪多,则春、夏病虫害多,发病早,虫害发生晚;下雪少,则发病轻、发病晚、虫害发生早。如梨黑星病,每当正月下大雪,该病多在5月 Prevention and control pear pests and diseases is one of the key measures to get pear harvest. In my thirty years of practice, after careful observation, I gradually learned some about the occurrence and development of pests and diseases of pears trees and worked out some measures for prevention and control. First, the general rule of pear pests and diseases in the year, the occurrence and development of pests and diseases and climate change. If the lunar January each year more snow, spring and summer pests and diseases, early onset, pests occur late; less snow, the incidence of light, late onset, early pests. Such as pear scab, whenever the first month of heavy snow, the disease mostly in May