Before and after flowering of apple, it refers to 10 to 15 days after the apple tree germinates until it falls. The time is generally from early April to early May. During this period, most of the overwintering pests have begun to be active, and natural enemy beneficial insects have also been involved in activities. The comprehensive prevention and control work during this period must be focused on the prevention and control of the main harmful objects. On the other hand, we must pay attention to the protection of natural enemies, try to use selective pesticides that have little effect on natural enemies, or minimize the use of natural enemies in pesticide application. The injury created a good situation for the comprehensive prevention and control work throughout the year. Scratch treatment on the basis of early spring curettage, check again, continue to adhere to curettage and lesions disinfection protection. When the applicator is sterilized, it must be sterilized again to prevent the disease from recurring. For the main trunk and main branch, 300 to 500 times of golden rot is used or 200 times of top cyprodin is sprayed. Prevention of leafhoppers and powdery mildew in the pre-harvest period of hawthorn leaves (mid-April, mid-April) and apple crucian carp hatching in the winter, and the progeny of the flowering period (from the end of April to the beginning of May) when When the female adult lycopene averages 1 to 2 heads per leaf, the entire garden is immediately prevented and controlled, spraying 2,000 times as much as extinction powder or 1500 to 2000 times of ferronickel tin or 2000 times of aspartame. Mixing 70% of RenoRota Chloride 1000 times can cure powdery mildew. If powdery mildew occurs seriously and the tip shoot bud damage rate reaches 5%, then 10% top benzalkonylcarbazole 2000 to 3000 times liquid or Jincuibei 50 toxin 4000 times liquid spray, the effect is very good. If both diseases and pests occur at the same time, the drugs for controlling leafhoppers and powdery mildew can be mixed and used. The golden tortoise shells that kill the flower shells of the golden tortoise shell are mainly the apple hairy golden tortoise, the small blue and white gold turtle and the black downed golden tortoise. It can use the dead nature of the tortoiseshell to kill the tree in the early morning and early evening, kill it with sweet and sour liquid, or sprinkle it on the ground. Black light and solar insect killer lights can also be set in the orchard to kill black velvet beetle. The main control objects for the treatment of flowering stage of spraying are spiraea purpurea, apple scutellariae and apple nevus. Can be controlled by the following two methods. 1 Emulsion coating: In the early stage of the mid-April and late-stage aphid damage, use a brush to apply a diluted agent with a systemic suction effect directly on the main stem or the base of the main branch, and apply a 6-cm ring. If the tree is rough, you can scrape the rough skin first, but don't hurt the tender skin. It can be slightly white, coated with plastic film or waste newspaper. Pharmaceutics can be used in Dingsheng red wolfberry fruit 20% imidacloprid solution can be 100 times liquid, the effect is very good, and does not harm the natural enemies, but the efficacy is slow, coated 3 to 5 days before significant efficacy, it should be used in the early stages of occurrence. 2 spray on the tree: when it happens, it can be sprayed with 25% blue peony 3000～4000 times before the leaf rolling or just before the start of leaf rolling. Note that the tumor should be used before flowering, and the effect after the flowering is not good. . The natural long-horned cows that control the damage of the beetle pests are mainly Sang Tianniu, Pyrocera longibrata, and Zhigenniu. For the prevention and control of longhorn cattle, small wire punctures, 20% imidacloprid 2000 times or 80% DDVP 1500 times injection can be used.