Mango flower, what is better?

Mango is one of the unique fruits in southern China. At present, mangoes are planted in many areas in southern China. There are also many varieties of mangoes in China, such as Tainong, Gold, Guifei, Ivory, Ruby, etc., which are widely planted in China. However, the varieties in many areas are different now, and the temperature and climate in the planting areas are changeable, especially when mango is in flowering period, due to temperature problems. Because of temperature and climate problems, pollination and fertilization of mango trees in many areas are poor, so today we will talk about what pesticides mango should use to promote flowering, hoping to help more growers.

Physical flower forcing method of mango flower

1, water control, root cutting and flower promotion technology

During mango planting, when mango ripens in the last autumn, reducing water supply, watering less and keeping the soil moist can improve the flowering rate of mango. Secondly, mango trees with strong leaves, especially those that did not bear fruit in that year, have advantages in the market, but they are not conducive to flower bud differentiation. Mango orchard should be thoroughly ploughed after the last autumn ripening, and the depth of deep ploughing is about 25~30 cm. You can also dig a deep ditch 30~40 cm deep in the soil layer outside the crown of fruit trees, and then cut off the absorption roots of some fruit trees, preferably capillary roots. Don't cover it in time after digging, and the soil layer should be dried for about 1~2 weeks. Then the organic fertilizer is buried in the soil to cover it, which can control the absorption of roots.

2, iron wire tied to the tree, cutting and peeling to promote flowers.

Using steel wire ring to tie fruit trees can effectively promote the flowering of fruit trees, but when using steel wire ring to tie fruit trees, we must pay attention to the use time. Tie fruit trees with iron wire rings, which should be around the slight cold of solar terms. Then, at a position about 50 cm from the ground, a circle of iron wire is wound around the trunk of the fruit tree, and then the iron wire is tied tightly. When the wire is pulled into the trunk cortex, we can urge the flowers, but remember to pull out the wire in time after the fruit trees bloom.

The technology of girdling is mainly to control the nutrient flow to the lower part under the photosynthesis of fruit trees. After girdling and girdling, the branches of fruit trees can accumulate a little rich nutrients and supply them to the upper part, which is beneficial to the differentiation of flower buds. When girdling and girdling are used, the operation should be carried out when the autumn shoots of fruit trees mature for the last time and the mother branches mature at this time. We stuck the trunk deep into the wood with a knife.

Technical methods of chemical drugs to promote flowers

Promoting flowers with drugs is also a common technique. Most of them use paclobutrazol, ethephon, potassium nitrate, cytokinin, flower-promoting treasure, etc. Among them, paclobutrazol has always been the best drug used by fruit farmers. Paclobutrazol can not only promote flowering, but also control new shoots. After mango is harvested, weeding and fertilization should be done in time, and then pruning should be done. The fruit trees must be pruned before June. When the tip of the second crown of the fruit tree is stable, we will push flowers at the root, usually before July and August. Generally, 20-50g paclobutrazol is used for each fruit tree, and 80-100g paclobutrazol for strong trees can increase the dosage. If the planting area is dry, water and paclobutrazol can be mixed.

The second is ethephon, which is usually used in August-September. Before the flower bud differentiation of mango, it is sprayed with 0.2% ethephon, or sprayed with 1% potassium nitrate on the top leaves of fruit trees in August-September, usually once every half month and continuously for 2-3 times. Cytokinins and NAA can also be used.

At the same time, in order to make fruit trees blossom in time after spraying chemicals, measures should be taken to protect flowers after urging flowers. When the stamens of mango grow to 20%-30%, they should be fertilized and watered to ensure that the stamens are not easy to fall off and the fruit setting rate is high. Then we spray flower protectors to protect the flowers, but there are also many pests in mango flowering period. Therefore, insects such as scale insects, thrips and borers should be killed before a large number of pests appear, but the drugs should be mainly low-toxic drugs, such as cypermethrin, gnats, buprofezin and trifluorocyanide. Because it is flowering, the frequency of spraying should not be too high, and it can be sprayed once every 20 days.