The Problems of Improper Bag Removal of Red Fuji Apple and the Countermeasures
Back to green Some fruit growers focus on the prospects of the “selling point†of the Bag-out Fuji market before the Mid-Autumn Festival, and advance the time of picking the bags to the end of August to the beginning of September. As a result, Red Fuji, which had a white background after the bag was removed, began to return to green five days later, and it was difficult to meet the merchant's acquisition requirements. In this way, paper bags that could have sold high prices could only sell at ordinary fruit prices. Reasons We all know that the fruit of the late-maturing coloring fuji such as Changfu No. 2 is 180 days. 30 days before maturity, fruit and leaf nutrients began to accumulate, and ethylene content gradually increased. Prior to this, the chlorophyll content of the bagged fruit was reduced under shading conditions, but as long as the tree body grew normally after the bag was removed, the chlorophyll of the leaves and fruit could be exchanged constantly. The more prosperous the tree vigor, the quicker the fruit exchanges after seeing light. The tree vigor is relatively stable or relatively weak. Countermeasures: Picking bags at the right time is the key to ensure the tenderness of the delicate skin of the fruit. It has been observed that it is more appropriate for the bags to be bagged in the growing period of about 100 days in Red Fuji bags. Therefore, it is estimated that the bag picking season in Shaanxi Weibei is from September 20 to the end of September. At a high altitude (above 800 meters), the eucalyptus area has a cool climate. Picking bags from September 20 to 25 is beneficial to coloring. Some northern parts of northern Fujian (500~700 meters) are too early to pick up the bags, and a small temperature difference is not conducive to coloration. Note that the bag removal time is closely related to climate change, and it is necessary to prevent the bag from returning green to a rough color when it is picked off, and to prevent the bag from yellowing and coloring due to a late bagging. According to another observation, during the suitable bag-out period (September 25 to October 1), it was best to pick a bag from a sunny sunny day after rain. Fruit sunburn Problems In recent years, fruit growers have been successful in selecting “one-off bags†for even a cloudy day. This is a daylong wish. However, the risk of doing so is very high. If a high temperature and strong sunshine weather occurs within 1 to 2 days after bag removal, a large amount of sun-burning fruit will be caused. Light local whitish, severe burns browning depression. Reason Bagging fruit is in the micro-environment of shading, heat preservation and moisturizing for a long period of time. If the bag suddenly encounters a drastic change of light and high temperature, the delicate skin will cause sunburn due to high temperature and drastic environmental changes. Measures to divide bags are effective measures to avoid and reduce sunburn. The fruit of the double-layer paper bag is recommended to be the first excluded bag, and the inner bag should be removed after 3 sunny days; the single-layer paper bag should be torn firstly on the backside of the fruit bag and removed once every 3 days; the paper bag should be put in the bag. Tear, remove the paper bag every 3 sunny days, keep the film bag color, after the full color film bags with storage or according to the merchant's request to remove the bag sales. Picking up the bag during the day should avoid the noon high temperature period, which will help the fruit gradually adapt to environmental changes and reduce sunburn. Water crack The problem water cracks mainly occur in the 3 to 4 days after the collection of bags in the year in which the previous high-temperature drought lasted. From September 20th to October 10th, it is a period of rapid expansion before fruit ripening, and it is also a period of high incidence of water cracks, which should attract sufficient attention from the majority of farmers. Cause Water cracks are the intermittent water supply during the growing season. The main reason for cracks is the inability of simultaneous development of peel cells and pulp cells. Paper-enveloped bags and bags of fruit bags have few moisture due to their good moisturizing properties throughout the growing season. Countermeasures Balanced water supply is the main measure to reduce the rate of water cracks. Especially during the second expansion in August, timely irrigation should be performed during drought, but do not flood the entire garden (without pouring between plants or between pouring plants). The balanced supply of water enables simultaneous growth and development of the skin and pulp cells and reduces the proportion of fruit cracks. According to the survey, from September 20 to October 10 before and after bag unwrapping is a rapid expansion of the fruit, do not irrigate, and the rate of fruit rind and sesame cracking increased significantly after irrigation. Because the irrigation water before and after bagbreaking meets the high temperature weather, during the day, the fruit is reduced due to the high temperature, and the fruit pulp is enlarged due to the moisture in the evening. The peel will be broken due to the excessive tension and form water cracks. Infrared Forehead Thermometer,High Quality Infrared Forehead Thermometer,Digital Thermometer:baby thermometer:best thermometer Shenzhen Urion Technology Co., Ltd. , https://www.urionhealth.com