What is the reason why mango leaves are so long?

Leaf curl virus? The head was the first to develop, and the growth almost stopped, and the medicine had to be used three times.

The fact that mango leaves are so long is because of the problem of the growing environment.

You need to put it in a sunny place, water it a little, and apply a little compound fertilizer.

Crumbling mango leaves can be caused by water and fertilizer, if the air is too dry, increase humidity or frequent foliar sprays.

Mango cultivation methods and precautions.

1. Temperature: Mango prefers a slightly higher environment. Generally speaking, between 25-30, is the most suitable.

If it is below 20, its growth will be affected to a certain extent. In winter, it is not very cold-tolerant, so it needs to be cold-proof, and it is better to keep it above 10.

2. Watering: In the growth period, mangoes have a high demand for water, so they need to replenish sufficient water. However, it is also afraid of waterlogging. Therefore, in addition to not watering too much and causing water accumulation, it is also necessary to prevent rain and drain water in time.

3. Light: The growth, flowering, and fruiting of mangoes are basically inseparable from the help of light. Therefore, it is very important to provide adequate light. However, care should be taken to avoid too strong light, and mild light is best.

4. Soil: Mango's requirements for soil are mainly in two aspects, one is drainage, and the other is pH, and it is necessary to choose soil with strong drainage ability and acidity.

5. Pruning: When the overall height of the plant grows to 80 to 100 cm, the branches need to be pruned. Leave three to five main branches, and cut the rest.

In addition, if the mango is placed indoors as a bonsai, it is very important to prune the shape and need to be carried out in time.

This situation is mainly due to the lack of light and fertilizer, so the top dressing will be watered, and it can be watered in time to dry and watered.

It is normal for the leaves of newly grown mango saplings to droop. Leave it alone.

Mango cultivation techniques.

Planning & Reclamation.

Choose a place where the climatic conditions are suitable, the soil layer is deep, fertile, the soil is not easy to compact, there is no water accumulation, and the orchard is built close to the water source. Larger orchards should be divided into small areas according to the topography, and shelterbelts, drainage and irrigation systems, roads and other facilities should be planned. The garden should be ploughed and harrowed, and the tree heads, thatch, and mango should be removed.

The slope is open to the mountain according to the contour height.

or terraces. Preparation for planting.

1. Planting density varies according to climate, soil fertility and varieties. At present, the planting density is 5 m 4 m (33 mu 3 m (44 mu mu) or 4 m 3 m (55 mu mu). In order to increase early gains, planting begins at 4 3 m and can be thinned into 6 m 4 m after harvest 3 to 5 years later.

2. Preparation for planting holes: dig holes 2 to 3 months before planting, 80 cm wide and 70 cm deep, and apply 20 to 30 kg of well-rotted pigs, cattle feces or soil miscellaneous fertilizer per hole, superphosphate.

to 1 kg, fertilizer mixed with topsoil back to the hole.

Colonization. It is better to colonize from June to August. Planting can also be carried out in the southwest and south from September to October, subject to irrigation conditions. If the seedlings are bagged, they can be planted from March to May in non-arid areas. Take cloudy days.

or colonization before rain as well. Planting with bare root seedlings should keep the root system stretched; If you use bagged seedlings for planting, you can't step on the compacted soil mass. The planting depth should be based on the flat soil surface of the root neck. After planting, drench the root water and cover it.

Fertilize. 1. Nitrogen and phosphorus fertilizers are mainly used for fertilization of young trees, and potassium fertilizers are appropriately combined, phosphate fertilizers such as superphosphate and bone meal are mainly applied as basal fertilizers, and top dressing is mainly nitrogen fertilizers. After planting, when the shoots are pulled out 1 to 2 times, top dressing will be applied once in March, May, July and September, and urea will be applied to each plant each time.

10 to 20 grams, compound fertilizer applied in September. If there is a drought, 1 to 2% liquid fertilizer or 1:4 of dilute stool water can be applied, and the amount of fertilizer used in the second year can be doubled. From June to August, organic fertilizer was added in combination with the expansion of the holes. Apply green manure to each plant.

50 kg, 20 to 30 kg of pig, cow manure or soil manure, or peanut cake, superphosphate to 1 kg.

2. The fertilization of fruiting trees is mainly nitrogen and potassium fertilizer, and the amount of potassium is not less than nitrogen, and is combined with phosphorus, calcium and magnesium fertilizer. Specifically, do the following four times of fertilizer:

1) Flowering fertilizer: Apply flowering fertilizer from October to November. Crown.

Within 4 meters (the same below), urea and potassium sulfate are applied to each plant.

150 grams each or 250 grams of compound fertilizer. As the canopy increases, the amount of fertilization increases accordingly.

2) When the amount of flowering is large, apply 100 to 150 grams of urea per plant after flowering, or add 1% urea or potassium nitrate in combination with spraying.

Top dressing outside the roots.

3) About 30 days after the strong fruit fertilizer flowering is the rapid growth period of the fruit, and it is also the spring shoot extraction period of young fruiting trees. At this time, nitrogen and potassium fertilizers should be applied 1 to 2 times to 15 days before harvest, or used as topdressing outside the roots to ensure the nutrients required for fruit growth.

4) Fertilizer after fruit harvesting, apply heavy fertilizer immediately, in the harvest year, before and after the harvest can be applied fast fiber hood to take the effect of nitrogen fertilizer, apply 150 to 200 grams of urea per plant, and then apply organic fertilizer and phosphate fertilizer after the stuffing.

Mango's nutrient deficiency and potassium deficiency can lead to this situation, and timely supplementation of potassium dihydrogen phosphate can alleviate this situation.

How mangoes are maintained.

Temperature. The suitable temperature for growth is 25-30, not less than 20 light. Grow in a sunny place as much as possible.

Watering. Water in time to avoid the soil being too dry.

Soil. The soil requirements are not high, and it is best to use slightly acidic sandy loam soil.

Xiu Dan key scissors. Control long branches and prune unhealthy branches.

Fertilize. During the flowering period, it is necessary to use the late omenous dissolution fertilizer in the fertile leaf water hole in time to supplement nutrients and promote the differentiation of flower buds.

Hello, the reason for the flowering of mango trees, flowers and leaves may be related to the operation in the orchard, the application of nitrogen fertilizer or nitrogen-containing foliar fertilizer causes the mango tree to grow leaves. There are also cases where the mango tree's own nutrients are insufficient, and the branches are not ripe. Therefore, we need to control the shoots, the purpose of shoot control is to effectively control the growth of nutrients, accumulate nutrients, and use them for the flower bud differentiation period.

Some people say that soil application of paclobutrazol will be time-sensitive, not suitable for soil application, will have a negative impact on mango trees, and will cause embryo fruit to mango fruit, so it is recommended that soil application should not be applied.

The leaves of the mango tree grow like this because of a lack of fertilizer and nutrients.

You can supplement some phosphate fertilizer, nitrogen fertilizer, potassium fertilizer or a variety of nutritionally complete compound fertilizers!

In addition, because the area where it is planted is not in a tropical climate, the leaves will grow like this.

Mango flowers have both sexuality and male flowers, and both sexuality flowers have normally developed stamens and pistils, which can carry out normal pollination, fertilization and fruiting; Male flowers do not have pistils and cannot bear fruit after flowering. Most cultivars account for more than 15% of the flowers of the hermaphroditic. A flower withers from petals to stigma for about a day.

The ovary begins to expand after the fruit develops, floweres and is fertilized, and increases rapidly after about a few months, and the growth is very slow or no growth in the first 10-15 days of fruit picking, which is mainly thickening, fullness and weight gain.

It takes 85-110 days for early maturing seeds, 100-120 days for medium-ripening seeds, and 120-150 days for late-maturing seeds. During the fruit development period, there were two obvious fruit drop peaks: the first time was about two weeks after flowering, mainly because the small fruits with poor fertilization withered and fell off, and the amount of fruit drop was large; The second time is 4-7 weeks after flowering, except for a small number of malformed or aborted fruits that are stunted, and more of them are caused by insufficient nutrients and water.

Bacterial black spot disease of mango mainly affects leaves, branches and young fruits. When the disease is severe, several small spots converge into irregular large spots, surrounded by halos, the midrib of the leaf turns black, local cracks, and the old lesions finally turn gray-white. The shoots are infected, the diseased part is visibly faded and cracked longitudinally, and the exuding glue becomes a black spot.

The fruit stalk is damaged, and the tissue is necrotic and causes the fruit to fall. The young fruit is damaged with dark green patches and oily halos around it, and the flesh turns black-brown in the later stage, and the diseased part overflows with pus when it is wet, which seriously leads to a large number of leaf and fruit drops.

The causative agent of the pathogenic mango bacterial melanoma is a bacterium called Xanthomonas nigra mango-causing species.

Pattern of onset. Pathogenic bacteria overwinter on infected shoots or diseased tissues. In the spring of the following year, under the conditions of suitable temperature and humidity, bacterial pus overflows from the disease, which is spread by rain or insects, and invades through the host's natural orifice or wound. After the initial infection, the diseased part overflows with pus, which spreads and continues to be re-infected.

The disease can occur all year round, and high temperatures, rainfall, and humidity often cause severe disease, resulting in a large number of leaf loss. In Guangdong, the plant incidence rate reached 100% in April and June, and the leaf incidence rate reached 30 80%, and the leaf incidence rate of local miscanthus seedlings was particularly serious.

Method: 1Do a good job of clearing the garden, reduce the initial infection of the source of fungus, combine pruning after harvesting, cut off diseased branches and leaves, and collect and burn diseased branches, diseased leaves, and fallen fruits on the ground. During the onset season, pay attention to pruning diseased branches and leaves at any time.

2.Spraying prevention and control should be sprayed to protect young shoots and young fruits in the tender shoots and young fruit period. The agent has 1% Bordeaux liquid; 40% copper oxychloride suspension 500 times; Agricultural streptomycin 2000 3000 times.

It is necessary to pay special attention to the weather forecast, and spray pesticides before and after typhoons and rains for protection and prevention. Seek adoption.

If it grows, it is not caused by water and hypertrophy, prune it regularly and control the fertilizer ratio.