Small trees in Taiwang can be peeled once every once in a while, preferably in late May. In addition, pruning should be done later, and it is necessary to cut it lightly and put it long, leave more branches and carve more buds to slow down the trend. Don't overemphasize the tree shape, mix first and then clear it, and then gradually clean it up after the tree is stable. Don't bundle the moderately weak trees. Apple root cotton aphid occurs once a year 1-9 generations. Accurately mastering the occurrence regularity of apple root cotton aphid is the key to effectively control cotton aphid. There are two reproductive peaks of the apple root cotton aphid, the first peak is from mid-May to mid-July, and the second peak is from mid-September to late June of 10. In areas where insect pests occur, when applying base fertilizer to dig fertilizer ditches in autumn and winter, pay attention to check whether there is white flocculent cotton wool and small roots absorbing root browning and necrosis, and if there is, it should be prevented. The suitable time for the first control is after the apple blossom falls, and it can be sprayed with 65,438+0,500-2,000 times of solution or coated with 5 times of solution. The second application is to spray 40% Aphidae EC on the water surface with the volume of 1500-2000 times at the end of June or the beginning of 10 after apple harvest, which can effectively kill root aphids and greatly reduce the harm of Aphidae in May and June of the following year. Apple root cotton aphid occurs once a year 1-9 generations. Accurately mastering the occurrence regularity of apple root cotton aphid is the key to effectively control cotton aphid. There are two reproductive peaks of the apple root cotton aphid, the first peak is from mid-May to mid-July, and the second peak is from mid-September to late June of 10. In areas where insect pests occur, when applying base fertilizer to dig fertilizer ditches in autumn and winter, pay attention to check whether there is white flocculent cotton wool and small roots absorbing root browning and necrosis, and if there is, it should be prevented. The suitable time for the first control is after the apple blossom falls, and it can be sprayed with 65,438+0,500-2,000 times of solution or coated with 5 times of solution. The second application is to spray 40% Aphidae EC on the water surface with the volume of 1500-2000 times at the end of June or the beginning of 10 after apple harvest, which can effectively kill root aphids and greatly reduce the harm of Aphidae in May and June of the following year.