Some bagged apples have black spots of varying sizes and sizes on the surface of the fruit, especially pods, and are slightly sunken. Some black spots have white spots. According to the survey, trees are generally more important than small trees. Weak trees are more important than strong trees. Trees are heavier than trees. Peripheral organs are heavier than internal warts. Spraying drugs is more important than bagging immediately. Bagging is preceded by more varieties. And the concentration is higher than that of less varieties and lower concentrations. Bitter bitter disease Because spring is the peak of apple absorption of calcium, but this year although the frequency of rain, but the rainfall is small, mostly ineffective rain, a considerable part of the farmers only see the surface of the wet, while ignoring the water, serious water shortage below 10 cm Affects the absorption of calcium. In particular, some depressions are caused by calcium deficiency. Phytotoxicity Improper spraying before bagging. One is blindly pursuing "new" drugs and increasing the concentration of epidermal cells. The second is too many varieties of drugs. Many growers spray 4 or 5 kinds of medicine before bagging, and the concentration is relatively increased, and the peel cells are damaged. The third is that the spraying is not scientific. Sprinklers stay in a certain place for a long time, large doses, damaged skin, too many holes in the water outlet, spray pressure is too large, the nozzle is too close to the fruit, are easy to hurt the skin and produce phytotoxicity. Weak trees, weak branches and old trees are poor in drug resistance and are prone to phytotoxicity. Some growers immediately bagged after spraying, and the drug did not penetrate evenly. The bag was immediately bagged. Due to the high humidity in the bag, the liquid was concentrated on the surface of the apple and drooped to the sagging part, resulting in a large concentration of the liquid in the sputum. Impaired skin. Special climate That is high temperature and humidity. Before July 20 of this year, although the rainfall was not large, the high frequency and high frequency allowed the black spot pathogens to enter the fruits through the vent holes of poor paper bags and bags with rain, and the black spot pathogens on the surface of the bag were at high temperatures. Breeding under high humidity. Black spot disease After the occurrence of phytotoxicity and bitter pit disease, the skin cells died, resulting in the invasion of saprophytic black spot pathogens. As the healthy parts continued to grow, the dead parts stopped growing. Therefore, some fruits are mostly sunken on the lesions. Bad bag quality The first is that the permeability is too strong, the bacteria is affected by the bag entering the fruit, and the second is poor permeability, that is, airtight, high temperature, high humidity, and more prone to phytotoxicity and breeding of germs. The reasons for the above may be one reason or two or more reasons. Lessons should be summarized and lessons learned. Self Propelled Reaper,Rice Harvester Reaper,Self Propelled Hay Baler,Self Propelled Reaper Binder Henan Qianli Machinery Co.,Ltd. , https://www.chalionagri.com