一、巧施草木灰。①防治蚜虫。用10千克草木灰对水50千克浸泡48小时,取滤液喷洒,可有效防治果树上的蚜虫。②防治根腐病。草木灰对防治梨、桃、山楂等果树根腐病效果很好。其方法是,先扒开果树根部的土壤,清除腐根周围的泥土,刮去发病根皮,晾晒24小时后每株覆盖新鲜草木灰2.5-5千克,再覆盖泥土。③防治白粉病。对发生白粉 First, Qiao Shi grass ash. ① control aphids. With 10 kg of ash to 50 kg of water soak for 48 hours, take filtrate spray, can effectively control aphids on fruit trees. ② control root rot. Ash against pears, peaches, hawthorn and other fruit tree root rot effect is very good. The method is to first open the soil at the root of the fruit tree, remove the soil around the rot root, and scrape off the diseased root bark. After drying for 24 hours, each plant covers 2.5-5 kg ​​of fresh grass ash and then cover the soil. ③ control powdery mildew. White powder occurs