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When harvesting, clear sunny dew should be selected. When rainy days, foggy days, and dew are still dry, fruit cells are filled with water, the peels are swollen, they are easily bumped, and they are easy to infect bacteria. Therefore, it is not appropriate to pick fruit; at noon, the temperature is high and the field heat is not easy to spread. The fruit rots and should not be harvested.
Second, the fine harvesting In order to avoid causing fruit mechanical injury as much as possible, we must master the harvesting technology, pay attention to improving the quality of fruit picking, is the key to maintaining the fruit's inherent resistance to Tibet and disease resistance. To avoid mechanical injuries, harvesters must take care. When harvesting, do not break the handle, and must use a fruit cutter to cut the fruit pedicle. The method of cutting is: the first cut and cut to 1 cm away from the fruit pedicle, and the second cuts and cuts the pods, neatly cuts the stems, avoids the stems being too long and too short, causing too much damage to other fruits, too short It also caused fruit wounds. Tree classification and under tree packing are effective measures to avoid mechanical damage caused by fruit picking, grading and packaging. In the process of harvesting, some people pick a first fruit, then most people pick up the second fruit, and other fruits are processed separately. The trees used for harvesting are to be covered with film or thick paper. The harvested fruit was directly loaded into a wooden box that was stored. After each box scale, the box was nailed into the storage tank to avoid sunlight and rain.
Third, the preservation of pesticides Pre-harvest, post-harvest pharmaceutical treatment is one of the important measures to ensure the quality of fruit storage and reduce decay. One week before harvest, the fruit pedicle was sprayed with 50-100ppm of 2,4-D; it could also be sprayed with 1,000-fold carbendazim or thiophanate and 50-100ppm of 2,4-D in the whole tree. Attached to the fruit on the role of bacteria, the effect of anti-corrosion of the fruit. Care should be taken when spraying the medicine. The fruit must be sprayed completely. After harvesting, dipping with 200ppm 2,4-D and 1000-fold thiophanate or carbendazim mixture can play a role in preservation.
In order to reduce the infection of germs, all boxes filled with orange must be sprayed with 0.1% carbendazim or 0.2% thiophanate. In particular, the boxes used last year should be cleaned, dried, and then sterilized with thiophanate-methyl or carbendazim.
Fourth, the warehouse storage of citrus at room temperature storage, do not require special equipment, general residential, general warehouse can be used, but the warehouse should be selected in the location of the West does not dry. The inside of the store is well ventilated and does not leak rain. The pile will not be exposed to sunlight and it will prevent rat damage.
Two weeks before the storage of citrus, use sulfur powder (100 g/m2) to seal and fumigate for 24 hours, or spray with 4% bleach, and then ventilate and ventilate for storage.
After packing, the citrus can be directly stored in the warehouse without being pre-cooled and stacked and stored. Keep a certain channel when stacking. There should be a top clearance between the boxes. The stacking should not be too large. When opening the library, all doors and windows must be opened to facilitate ventilation and ventilation of the citrus fruit. After 20-25 days of fruit sweating, when the weight loss of the fruit is 3%-4%, the doors and windows must be closed to continue sweating for a week, and then the box should be covered with a film. It will be reopened once a week for ventilation. During the storage period, the window temperature and the temperature difference between day and night should be used to adjust the temperature in the storage. When the temperature drops below 10°C, it is necessary to maintain the storage temperature so as to avoid freezing damage. In the later period of storage, when the temperature rises, more attention should be paid to ventilation to prevent changes in flavor. After the oranges are put into storage, it is best not to flip and pick out the rotten fruit in time, which can reduce the chance of infection and reduce the incidence.
Citrus harvesting and room temperature storage
I. Early or late harvesting of timely harvested citrus can affect its loss, decay, onset, and shelf life. For the storage of oranges, it is required that the fruit be fully grown, that sufficient sugars be accumulated and that the sugar content no longer increase substantially, the acid is not reduced, and the skin color is generally harvested when it turns yellow.