In addition to promoting fruit enlargement, proper watering prior to watering in bags has two functions. First, it reduces the incidence of sunburn after bags are removed, and the other function is to change the microclimate conditions of orchards, increase the temperature difference between day and night, and create night dew. Fruit coloring (it is also possible to spray water throughout the park in the evening of fruit coloring). The watering time was carried out 5 days before the bag was removed. Afterwards, it was watered timely depending on the weather conditions. The amount of water was not easy to be large, and the soil moisture content was maintained at about 60%. To control the time of bag removal, Red Fuji apples are removed from the bag 30 days before picking. It is best to choose cloudy or cloudy weather in order to avoid the daily burning of the fruits after bag removal. If the bags are removed at high temperatures, they can be taken at 10:00 am When the temperature of the surface is similar to or slightly higher than the temperature of the atmosphere, bags are not removed and it is not easy to remove bags in the morning or in the evening. The purpose of removing the bag at the same time is to prevent the wear of the leaves on the fruit surface after removing the bag. The used waste bag can be used to pad the surface of the fruit near the branch, and the branches that are easy to pierce the fruit surface can be removed before removing the bag. Pick the leaves and turn the fruits to remove the fruit in the bag. Fuji apple coloring is mainly due to direct light, under the astigmatism conditions, poor coloring, so in addition to the bag should be removed in time to affect the coloring of the branches and leaves, pick the leaves at the same time the fruit's dark side turned to the positive side, the production of red fruit. Be careful when handling to avoid turning off the fruit. The total amount of picked leaves is controlled at 10% to 15%, and cannot exceed 20%. Leaf picking should not be carried out at noon during the sun exposure to avoid the occurrence of sunburn. The time should be after 3 o'clock in the cloudy or sunny afternoon. After spraying foliar Fuji apples with bags, because of the high temperature inside the bag, the metabolism of calcium is strong, and the mobility of calcium in the tree body is small, compared with not bagging fruit, it is more likely to cause calcium deficiency, causing bitter pit disease. After the bag is in the near mature stage, it is once again the peak of calcium absorption. Therefore, the timely spraying of calcium fertilizer 2 to 3 times after bag removal can reduce the occurrence of bitter pit disease. A variety of Amino Acid calcium fertilizers are available. In addition, in order to promote the coloration of the fruit, in combination with calcium supplementation, 200 to 300 times more potassium dihydrogen phosphate is sprayed on the leaves for 2 to 3 times. Prevent disease and protect the red spot disease and ring rot disease can infect the fruit after removing the bag, so that the fruit surface occurs 1 to 2 mm red-brown lesions, reduce the good fruit rate, affect the selling price. The prevention and control method is to start spraying the whole tree 5 days after bag removal. Pharmaceutics should use powders or liquids that are therapeutic and do not stimulate the fruit surface, such as: 70% of the imports of domestic products or 1000 tons of domestic pure products, and 80% of carbendazim powder 1000 times.
Veterinary Drug Premix,Premix For Animal,Veterinary Premix,Poultry Premix Feed NANYANG CHENGPENG PHARMACEUTICAL CO.,LTD , https://www.chppharm.com