Apple bagging is to increase the appearance quality of fruits and reduce the pollution of pesticides. Over the years, more and more bags have been used, and many fruit growers do not value the management of apple bags before and after bag removal. Members of the fruit innovation team in Shandong Province, the person in charge of the fruit and vegetable video network, and Xu Mingju, the director of Xu Mingju's model innovation studio, also found that many farmers only had problems in the final stage of management, which affected their earnings.
Then, what are the main points of fruit tree management before and after bag extraction?
Pest prevention before bag removal
First, before picking the bags, the orchards have to pour water to reduce the incidence of sunburn. Conditional farmers can install integrated irrigation and irrigation facilities for water and fertilizer so that they can perform better.
Second, before picking the bags, the orchards must also fight drugs and pests. Two or three days before picking the bag, the orchard must take good medicine, clear the garden, and create a safe environment for Apple to pick it up. Xu Mingju said that one year's payoffs will be harvested, and the fruit grower must not take it lightly at this time. Otherwise, an oversight, a big apple that has become infected or be bitten by insects, makes people feel bad.
During this period, there are many diseases that need to be prevented, such as black spot disease, red dot disease, ringworm disease, anthrax and the like. Pests that need to be prevented include insects such as Heliothis virescens and leaf roller moths. For the fruit farmer's drug regimen, it can be selected 2000 times more than quinolone sodium 1500 times, plus another 400 times polypeptin.
Bags to prevent pests and diseases
After picking the bag, when the apple encounters light rain or heavy fog, the fruit surface is prone to red spot disease. Therefore, on the day after the bag is removed or within 2 days, the water disinfectant should be sprayed. Can be used for sterilization of 500 times of Ningnanmycin. In addition, we must mention the light and reduce the daily burning. “People live a face and sell a piece of skin.†Apple's performance is good or bad, and whether there is a daily burning will directly affect the price of Apple.
After the bag is picked, the fruit is directly exposed to the outside. During this period, the spraying calcium fertilizer can be directly absorbed and utilized by the fruit, which is very important for the prevention of bitter pit disease. Spray 400 times amino acid calcium is also good.
In addition, after the bag is removed, the fruit may not be colored due to the influence of the climate, and it is more difficult to paint it when frost occurs. Therefore, the crop may be sprayed with a foliar fertilizer to promote coloring before the bag is removed. 0.3% potassium dihydrogen phosphate can be applied.
Picking the bag is a key
In recent years, it has been very prominent that apples have not been painted after bag extraction, especially for striped apples and old red varieties. Of course, there are many reasons for this, but it is also crucial to take control of the bag.
Picking the bag prematurely, the green apple of the fruit is hard to color, or it has a green head when it is colored; the apple that has been picked too late, especially when the fruit turns yellow, is not easily colored. Therefore, Apple must ensure that the time in the bag is sufficient - but not too long. Red Fuji apples generally take 100-120 days or so depending on the weather conditions. The Jiaodong region is generally conducted from the end of September to the beginning of the 10th. This kind of early ripening fruit can be picked up in mid-August, and the specifics should be judged according to the local climate.
Picking bag sequence single layer double layer different
Apples with red wax bags must be picked twice before being picked. After the outer paper bag was picked, the red wax inner bag was removed again at intervals of 2-3 days. This interval is to give the fruit a period of time to adapt to the external environment; if all of the internal and external bags are suddenly taken off at once, it is very prone to burn.
For apples with a single-layer bag, the bag body can be torn into an umbrella shape 20-30 days before harvesting. The cover is on the fruit to prevent direct sunlight from the fruit surface. After 7-10 days, the whole bag is removed to prevent the day. Burn, accelerate coloring.
After picking the bag, if it is necessary to carry out artistic stickers, the fruit grower can carry it out immediately after bag extraction.
What to do after picking the bag
After picking the bag, the first is to trim in the fall, remove stubborn branches, competing branches, erect branches, to ensure that branches see the light to increase light, improve the light transmittance of the crown.
Second, remove the leaves. The main leaves of the fruit are removed, and the leaves from the base of the new shoot near the fruit to the middle can also be appropriately removed to promote the coloration of the fruit, and at the same time, the foliar is prevented from forming a spotted patch on the fruit surface, and some pests can also be prevented from covering the fruit with the help of the blade. . The leaves were generally divided into two stages: the first combined removal of the inner bag was performed to remove the lobule around the fruit, and the second time was performed after the first leaf was harvested for one week, and all shade leaves around the fruit were removed.
In addition, the transfer should be carried out about 15 days after picking the bag (that is, after the color on the positive surface). Using the method of changing the position of the shoot and the direction of the fruit, turn the fruit's yin to the positive side (to prevent the fruit from turning back to the original position, use transparent tape. The fruit is fixed so that it is fully exposed to light. Turn the fruit handle gently to avoid spraining the fruit and leaving the layer, resulting in fruit drop; the fruit transfer time is preferably before 10:00 am and after 4:00 pm. The padding is to use the paper bag that is taken off and padded the surface of the fruit close to the branches to prevent the fruit surface from being damaged after picking the bag.
In the fruit coloring period, the silver reflective film on the tree plate can improve the shade and lower light in the canopy, make the full color of the lower canopy fruit, and increase the sugar content of the fruit. The reflective film should be laid under the canopy of the tree, with work lanes between the rows, fixed edges, and the extent of the ceiling should be limited to the vertical projection of the canopy. The reflective film should be washed, dried and dried 1 to 2 days before fruit harvesting, and it can be used again in the second year.
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