1. Fruit tree rot All apple production regions in the country have occurred, and old orchards and orchards with extensive management have been seriously affected; tree orchards have been afflicted with severe disease incidence, and fruit trees that are subject to freezing injury in winter are prone to disease. Once the fruit trees are onset, if they are not treated in time, the tree vigor will be weakened and the disease will be aggravated. For several years, it will cause the death of the main branch or lateral branch, or even the death of the whole tree. There are two types of damage symptoms of apple tree rot: ulcer type and branch dry type. Control methods: The main method of controlling apple tree rot is scraping and treating lesions. After the scraping of the lesion, it is sterilized by applying the medicine. The commonly used agents are Corbicidal Emulsion 2 times, 5% Mycorrhizal Moisture Reagent 30 to 50 times, 2% Agricultural Anti Retardant 120 Water 10 to 20 times, and 10% Silver Emulsion 150 times. Apply once a month after the first application. In order to prevent the recurrence of disease, the second year of spring will be applied once again at the affected area. 2. Ringworm disease This pathogen is both harmful to the branches and also harms the fruit. The pathogen is overwintering in the diseased tumor on the trunk and has the characteristics of latent infection. The pathogen invades in the young fruit period and develops in the late stages of fruit development. Usually about 10 days after flowering, if there is rain, germs can infect young fruit. The period of infection of the bacteria is from late May to early September. The peak period of infection is concentrated from early June to mid-August. Every time there is rain, bacteria must infect the fruit. The extent of the disease is greatly affected by the rainfall and rainfall frequency. In the years when the frequency of rainfall is high and the rain is heavy, the disease is heavy; in the drought year, the disease is light. Different varieties of apple have different disease resistance. Golden crown and Fuji are more susceptible. Control methods: a. Scratch treatment of tumors. It is an effective way to eradicate germs by scraping off the tumors on the trunk and applying medicine in the early spring. Generally, after scraping off the tumor, apply 50% carbendazim WP 50 times to effectively eradicate the bacteria and reduce the initial infection source. b. Chemical control. For the first time, the control of rotten fruit should be sprayed about 15 days after flowering, and it should be sprayed every half month or so until mid-August. The number of sprays should be based on rainfall after fruit trees fall. The commonly used agents include 50% carbendazim WP, 600-800 times, 70% Mancozeb WP, 600-700 times, 80% WP, 800 times, 70% thiophanate-methyl wettable 800 times liquid powder, Bordeaux liquid and so on. Practice has proved that the use of Bordeaux mixture and organic synthetic fungicides can improve the control effect, especially in the rainy season, the effect is more obvious. 3. Early deciduous disease Early defoliation is mainly caused by Alternaria alternata and Alternaria brassicae, the former being heavy. Slight incidence of saplings, the results of the tree is more severe, the Marshal is more severe disease. Severely diseased fruit trees often fall ahead of fallen leaves, which seriously affects flower bud formation and fruit quality in the following year. The environmental conditions that cause major diseases are mainly rainfall. In rainy years, disease epidemics often occur. The characteristic of the Alternaria alternata is that it can be infected after infection, and it will soon cause fallen leaves. Control methods: The prevention and control of early-stage apple defoliation is mainly based on chemical control. The key period of spraying is from mid-May to early August. When the diseased leaf rate reaches 10%, the spraying is started. After that, when the diseased leaf rate reaches 20% to 30%, it is sprayed once and sprayed three times. The agents with good control effect are 50% acetaminophen wettable powder 1000-1500 times, and 10% polyoxorubicin (Polaroid) wettable powder 1000-1500 times liquid. These agents can be combined with Bordeaux mixture and Pharmacy. Manganese zinc alternate use. Face Temperature Machine,Temperature Face Recognition,Face Recognition Temperature Scanner,Face Recognition Time Attendance Chongqing Huifan Technology Co., Ltd , https://www.hfsecuritytech.com