To overcome the mango size results, the first is to have the appropriate amount of flowers; the second is to avoid the low temperature and rainy weather; the third is to try to increase the fruit setting rate. The measures are:

First, the selection of varieties according to the characteristics of low temperature and rainy weather in early spring in Guangxi, mango flowering is ideal after the first ten days of April. Therefore, it is necessary to select varieties with a high flowering period and a high degree of bisexual flowering after the flowering is frozen, such as purple flowers, cinnamon, autumn and ivory.

Second, strengthen management
After harvesting fruit, organic fertilizer should be added, especially phosphorus and potassium fertilizers, and quick-acting fertilizer should be applied in the long autumn shoots, flowering spikes, flowering period and fruiting period. After the fruit picking, shallow tillage, deep tillage before and after the winter, to create a fertile, loose, moist and fertile, water, gas, heat coordinated orchard soil environment. For mango orchards in thin and hilly areas and hilly areas, special attention should be paid to deep-plowing and greening to change soil; doing a good job of irrigation and drainage system and soil and water conservation project in the orchard, laying a good foundation for high yield and stable production of mango.

Third, the rational mangoing of the mango trees is generally carried out in summer and post-harvest pruning . Summer shears usually remove all summer shoots to regulate the contradiction between the summer shoots and the fruit to compete for nutrients; at the same time, the inner litchi and the weak and overly dense inflorescences should be removed; the upper and lower flowers without fruit branches should be cut off to cover the upper part of the fruit. The fruit is exposed, reducing the pests and diseases, and promoting the growth of the fruit. Pruning after harvesting is usually carried out after picking the fruit and before the germination of the autumn shoots. Eliminate excessively dense branches, weak branches, drooping branches, ineffective senescent shoots, litchi and pests that affect light, to improve light conditions and to save nutrients, and to promote the growth of branches. In addition, the cross branches between the canopy and the canopy should be retracted to keep the crown at a certain distance; the deciduous decaying branches, the long vegetative branches and the resulting mother branches should be cut to promote the growth of the autumn shoots.

Fourth, the prevention and control of pests Mango diseases are: anthracnose, coal smoke, *** disease, gum disease, fruit class disease and scab disease; insect pests are mainly: tail night 娥 (also known as borer worm, 蛀 蛾) , leafhopper, poisonous cockroach, chafer, etc. Anti-disease carbendazim or thiophanate 700-800 times solution, each time the new shoots are taken out, the fruit-hanging period is sprayed 1-2 times; when the new shoots are about 3 cm long, the sprayed insects and insecticides are each 800 Double solution or methamidophos, omethoate 800-1000 times solution, once every 7-10 days, each tip 2-3 times.

Fifth, the promotion of flower picking flowers in small years is not enough to reduce production. For late flower varieties, the canopy can be sprayed with an ethephon 800-1000 times solution or an ethephon 1000-1200 times solution plus a B9 300-400 times liquid mixture from mid-December to the first day of the day, which can increase the heading rate by 15%-35%. . If the inflorescence is drawn too early, it can be removed when the inflorescence grows to 3-5 cm to promote re-germination of the lateral flower buds.

6. In the flower-preserving and fruit-preserving period, bee pollination is carried out, and 15 boxes of bees are placed per hectare orchard; in the case of few bees, artificially assisted pollination is used. After flowering, use 0.3% potassium dihydrogen phosphate plus 0.2% urea for root dressing 1-2 times; spray 0.1% boric acid during full bloom; spray 5-8PPM spring for 2.4-D2-3 times or 20-3OPPM during the full fruit period "Whether, it has a significant effect on the preservation of flowers and fruits.