First, frost warning 1, based on early warning (1) weather forecasting and analysis at all levels of meteorological observatories and apple stations; (2) Relevant departments of all levels of government on the occurrence and prevention of apple frost bloom related documents and notices; (3) early warning and notification of apple flower frost frost at all levels of government and other relevant departments; (4) Observing and understanding of the facts of apple frost during the flowering period by the industry, the department, and the unit. 2, early warning level and emergency plan Apple's early frost warning system uses a three-level early warning system, which is called blue warning, yellow warning and orange warning. The warning level of the blue warning is lower, and the warning level of the orange warning is higher. The classification of the warning level is based on the time and intensity of possible frost, and the extent and degree of damage that the frost may cause. (1) Blue warning: The minimum temperature will fall below 0°C within 48 hours of apple flowering, which will have adverse effects on apple flowering and fruit setting, and may cause the apple fruit setting rate to decrease by less than 20% than normal. The government and industry authorities should do a good job in frost prevention preparation according to their responsibilities; rural grassroots organizations, fruit farmers' associations, fruit industry cooperatives, apple production companies, and fruit farmers should pay attention to local frost warning information in order to take measures to strengthen protection. (2) Yellow warning: The minimum temperature will fall below -3°C within 24 hours of the apple flowering period, which will have a more serious impact on apple flowering and fruit setting, which may cause the apple fruit setting rate to be reduced by more than 20-50% than normal, and the flower organ Or young fruit, young leaf development will also be slightly affected. The government and industry authorities shall do a good job of frost prevention emergency work in accordance with their responsibilities; rural grassroots organizations, fruit farmers associations, fruit industry cooperatives, etc. shall widely launch apple production enterprises and fruit farmers to prevent and respond to disasters; actively take field irrigation, smoke, cover, spray freeze protection Liquid and other anti-frost, freezing measures to reduce freezing damage and minimize losses. (3) Orange warning: The minimum temperature within 24 hours of the apple flowering period will fall below -5°C, which will have a serious impact on the flowering and fruit setting of the apple. This may cause the apple fruit setting rate to be reduced by more than 50-75% than normal, and may even cause Production; and flower organs or young fruit, young leaves may show obvious symptoms of frost damage. The government and industry authorities shall do a good job of frost prevention emergency work in accordance with their responsibilities; rural grassroots organizations, fruit farmers associations, fruit industry cooperatives, etc. shall widely launch apple production enterprises and fruit farmers to prevent and respond to disasters; actively take field irrigation, smoke, cover, spray freeze protection Liquid and other anti-frost, freezing countermeasures to reduce freezing damage and minimize losses. Second, post-disaster emergency work 1. After the frost has passed, organize a thorough inspection of the growth and results of the orchard tree in the production area, and propose specific plans for the actual disaster situation. 2. To comprehensively assess the impact and degree of frost on young fruit, shoots, young leaves, and flower organs of fruit trees, and implement positive countermeasures to minimize disaster losses as much as possible. III. Post-disaster rescue measures 1. Relieve frost damage: After the occurrence of frost, spray the water on the canopy in time, which can effectively reduce the temperature of the ground and the temperature of the trees, thereby effectively alleviating the hazard of frost. 2. Protecting fruit and fruit, promoting fruit setting: If the flowers are not finished, artificial pollination can be carried out immediately. That is, the appropriate pollination tree is used for flowering and milling, and then each flower left in the inflorescence is pollinated one by one by artificial dot method. , And it is best to repeat 2 to 3 times throughout the flowering period to improve the fruit setting rate. After flowering, spraying Tianda 2116 or brassinolide 481 etc. immediately after flowering can significantly increase the fruit setting rate and can compensate for a certain loss of production. 3, to strengthen the comprehensive management of soil and fertilizer water, promote fruit development: timely frost after the occurrence of frost, in order to facilitate the absorption of root water, so as to achieve the purpose of roots and trees, so that the tree as soon as possible to restore growth. Timely application of compound fertilizer, silicon, calcium, magnesium, potash fertilizer, soil conditioning fertilizer, humic acid fertilizer, etc., to promote fruit development, increase the weight of single fruit, restore production. Strengthen soil management and promote root and fruit growth to reduce disaster losses. 4, to strengthen the prevention and control of pests and diseases. After the fruit trees suffer frost damage, the trees are weakened and the resistance is poor, and the diseases and insect pests are easy to occur. Especially, fruit rust and frost ring disease are prone to occur. Therefore, we must pay attention to the comprehensive prevention and control of pests and diseases to minimize the production and economic losses caused by pests and diseases. SICHUAN UNIWELL BIOTECHNOLOGY CO.,LTD. , https://www.uniwellbio.com