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Bagging time.
Bananas are generally bent up after the bud is broken, and it is better to bag them when the peel starts to turn green. If the bagging is too early, due to the large number of diseases and insects in the young fruit, it is difficult to spray and control it. At the same time, it also affects the upward bending of the fruit, which is not conducive to the formation of a beautiful comb shape, and the appearance is not good. If bagging is too late, the purpose of sun protection, rain protection, insect protection, disease prevention, cold protection and fruit protection will not be achieved.
Arrangement and pest control before bagging.
Before bagging bananas, it is necessary to do a good job in sorting out the ears and preventing diseases and insects. The finishing of the fruit ear is to determine the number of combs of the fruit ear when the bud is broken and to carry out appropriate fruit thinning treatment before the broken bud reaches the upward bending of the fruit direction. The growth and development of banana ear is limited by water and temperature conditions, and the number of combs and fruit should not be left too much.
It depends on the variety and the growth of the plant. After the buds are broken, the fruit fingers that grow too densely and irregularly should be thinned out in time. When there are bisporus fruit, three-layer fruit on the banana fruit, and the last comb is less than 10 fruit fingers, it should be thinned out. Except; for banana ears with 9 combs but less than 10 combs, 2 combs should be removed and 8 comb fruit handles should be removed, and if there are 11 combs less than 12 combs, 2 combs should be removed and 10 comb fruit handles should be removed. Leave 1-2 small fruits on the last combing handle, which is beneficial to the nutritional supply of the banana fruit, prevents the banana shaft from drying up, and ensures that the fruit can grow evenly, and the fruit shape is full, neat and beautiful.
Tender banana fruits are vulnerable to pests and diseases, and spraying pesticides to prevent and control pests before bagging. Before bagging, it is usually necessary to spray the medicine twice. The first time is to spray immediately when the bud is broken. You can use 30% Aimiao 1500 times solution plus 10% imidacloprid WP 2000 times solution or 25% Spot 2000 times solution plus 10% sterilization. The 2000 times liquid of Sauli EC was evenly sprayed on the banana plants and buds to control the pathogenic sources of anthracnose, scab and pedicel rot. For the second time, spray it when the fruit finger is bent up, and when the banana peel turns green, choose to use 2.5% Kung Fu (cyhalothrin) EC 3000 times liquid plus 30% Amimiu Suspension 1500 times liquid or 10% in the morning on a sunny day 2,000 times of high-efficiency metpaco emulsifiable concentrate plus 1,500 times of 30% Amimieu suspending agent is sprayed evenly on banana fruit once, and nutrients (such as Green Fenwei, Gaomei Shi, potassium dihydrogen phosphate, etc.) can also be added when spraying. Spray the strong fruit together, and then bag the fruit surface after the liquid is dry.
3. Bagging operation.
The bagging of banana fruit is 7-10 days after the banana buds are broken. When the banana fruit points upward and the banana peel turns green, spray with the last medicine.
After the liquid is dry, the fruit ear can be covered with double-layer bagging of EPE film. For bagging, the outer layer is a blue film bag with a length of 130 cm and a width of 77 cm, and the inner layer is a paper bag with a length of 120-140 cm and a width of 77 cm. Before bagging, open the bag mouth, align the banana ear and insert the whole fruit ear from bottom to top, and then use the upper part to tie the bag mouth at the fruit shaft to prevent rainwater from flowing into the bag. When bagging, the action should be light, so as not to damage the fruit due to friction between the bag and the fruit. When bagging from June to August, 4 symmetrical 8 small holes should be opened in the middle and upper part of the bag before bagging, which is more conducive to ventilation in the bag. After September, there is no need to make small holes for bagging. Before a cold current occurs, the film on the lower part of the bag can be tied tightly, and then a small bamboo tube is placed in the middle of the binding mouth to facilitate the elimination of waterlogging.
4. Management after bagging.
After bagging, you should always check the condition of the fruit fingers, and deal with any problems in time. If you find that the humidity is too high, you must open the bag to ventilate, and then wrap it after the moisture is dry. Once the pests are found, they should be sprayed in time to prevent and control them.
