What is the disease of banana leaves that dry and yellow at the edges?

There are several reasons why the edges of banana leaves dry and turn yellow:

1.Leaf spot: Leaf spot is the main cause of banana leaf edge dryness, which is an infectious fungal disease, which is prone to occur or seriously occurs in plots or seasons with high temperature, high humidity and poor ventilation.

2.Potassium or sulphur deficiency: Potassium or sulphur deficiency can also cause leaf margins to dry out.

Potassium deficiency first appears in old leaves, and the tips and margins of old leaves first turn yellow, and then turn black-brown and dry. When bananas are deficient in sulfur, young leaves lose green and turn white, which will lead to leaf margin necrosis in severe cases.

3.Other factors: waterlogging, chilling damage, fertilizer damage, air pollution and other factors can also cause the edges of banana leaves to dry up or the whole leaf to wither.

Waterlogging and fertilizer damage will lead to serious damage or necrosis of the root system, affect the function of the root system, lead to the contradiction between the water demand and water supply of banana plants, and cause the edge of banana leaves to dry up first. Chilling injury is mainly caused by advection low temperature dry wind, which often causes the edge of the leaf to turn brown. Air pollution first caused water-stained yellowing lesions on the edge of the new leaves, and then developed into wavy necrotic zones along the leaf margins to the midrib.

The above are the possible causes that cause the edges of banana leaves to dry and yellow, if you encounter this problem, please adjust the workaround according to the actual situation.

Summary: There are many reasons why banana leaves turn yellow. If it is caused by unsuitable soil quality, it is necessary to improve the soil properties. A large amount of calcium fertilizer and magnesium fertilizer can be put in, and the frequency of fertilization and irrigation can be increased at the same time to expand the effective improvement range.

If it is caused by excessive fertilization, the fertilization should be stopped first, and then water should be poured into the soil to wash away the accumulated fertilizer. If it is caused by disease, you can choose to spray with a high-efficiency fungicide**. This allows the banana to recover better and faster.

1. Unsuitable soil quality 1. Reason: If the banana is cultivated in acidic soil, its growth will be affected, and it will not be able to maintain the supply of nutrients, resulting in yellowing of the leaves and easy to disease. 2. Treatment:

The first is to apply soil amendments to improve the soil properties at the bottom of the ridge; The second is to invest a large amount of calcium fertilizer and magnesium fertilizer, and at the same time increase the frequency of fertilization and irrigation to expand the scope of effective improvement.

2. Excessive fertilization 1, reason: Banana growth does not need too much fertilizer, if excessive fertilization during breeding, it will cause it to be too late to absorb, excess fertilizer remains in the soil, so that the root system is damaged, resulting in yellow leaves. 2. Treatment:

Fertilization should be stopped first, and then water should be poured into the soil to wash away the manure in the soil.

3. Disease problem 1, cause: the yellowing of banana leaves is mostly caused by wilt, which will harm the rhizome and leaves of bananas, affect the normal growth and development of bananas, and cause yellowing and wilting of leaves. 2. Treatment:

High-efficiency fungicides can be selected to treat crop wilt diseases, and at the same time promote better and faster recovery of banana growth and enhance disease resistance.

The edges of the banana leaves are dry.

Yellow, in this case, most of it is caused by high temperatures in summer, and if the ground is dry, this situation is easy to occur.

The lack of water leads to the yellow leaves of the next generation. 2. Potassium deficiency causes yellow leaves. 3. Yellow leaves are caused by pesticide damage.

4. Banana leaf spot disease causes yellowing of leaves in the early stage. 5. Yellow leaves caused by insect pests. 6. Xiangyun banana sheath rot causes yellow leaves.

7. Banana variety variation causes yellow leaves. 8. Bananas turn yellow when they are old.

It may be suffering from blight, which is also called banana panama disease or Fusarium wilting disease, which mainly damages bananas, pink bananas and dwarf fragrant bud bananas. The diseased plant begins to turn yellow in the leaf sheath on the outer side of the lower leaf, gradually turns yellow from the base of the leaf, or from the leaf margin to the midrib, and develops to the whole leaf yellowing, drooping, withering, and drying. The diseased plant is often necrotic of the heart leaf, the base of the pseudostem is longitudinally split, the bulb and pseudostem of the diseased plant are dissected, and the vascular bundles are reddish-brown or brown spots or lines, and the darker the discoloration is closer to the base of the stem.

The root system of the diseased plant also eventually turns black and dies, and finally the adult plant dies.

Prevention and control measures: 1. The mild disease strain is diluted with multibacterial blind eggplant and injected into the bulb with 2 active ingredients medicinal mill pure liquid, 3 ml per plant is injected, and 1 injection is given every quarter.

2. Dig up the whole diseased plant, remove it from the banana orchard and burn it, and sprinkle lime on the diseased hole.

3. Increase the application of organic fertilizer and potassium fertilizer to enhance the disease resistance of plants. Flat fields can be flooded for half a year or rotated with rice if conditions permit.

Summary. Hello, I'm glad to answer for you, what to do if the banana tree is yellow, the conditional banana orchard can be injected with glyphosate solution into the diseased banana plant (injected at 15 cm in plant height, 10 ml for large plants, 3 ml for small seedlings), and after the plant is dead, collect the diseased plants and burn them or bury them deeply. Banana orchards in sporadic areas must be replanted with other non-banana crops or used for other purposes; Banana orchards in seriously affected areas should be disinfected with lime or carbendazim and other agents around the diseased plants, and agricultural prevention and control should be carried out.

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Hello, I'm glad to answer for you, what to do if the banana tree is yellowed and the beam is closed, the conditional banana orchard can be injected with glyphosate solution into the diseased banana noisy plant (injected at the height of the plant 15 cm, 10 ml of large plants, 3 ml of small seedlings), and after the plant dies, collect the diseased plants and burn them or bury them deeply. Banana orchards in sporadic disease areas must be replanted with other non-banana oak crops or used for other purposes; Banana orchards in seriously affected areas should be disinfected with lime or carbendazim and other agents around the diseased plants, and agricultural prevention and control should be carried out. Compare the heart] [compare the heart] [compare the heart].

The fungus of banana wilt mainly extends from the root of the diseased banana tree to the suction bud used for propagation through the bud sucking duct, and the disease spreads when the diseased bud is used for propagation. The soil around the roots of the diseased banana is also the place where the germs are kept. When the environmental conditions are suitable, conidia can be produced in the diseased part of the susceptible host.

If banana seedlings are planted on diseased soil, the pathogen can invade from the roots and develop to the stems through the host vascular bundles. Pathogens in the soil usually invade the host through injured or uninjured young roots, or injured rhizomes, and then spread to pseudostems and leaves.

It is estimated that it was harmed by nematodes. The cause of the disease is that the nematode first damages the roots of bananas, causing the root hairs of the affected plants to form tumors and rot on the root surface. When bananas suffer from nematode damage, the aerial part is slow leaf extraction, leaf spacing is shortened, and the plant is dwarfed, generally only the uppermost 2-3 leaves are green, and the rest are green and yellow, and it is easy to attract several serious leaf spot diseases.

The buds of the plant, the old leaves are like burnt wilting, and the fruit spike cannot bend down normally when it is severe, and the fruit is thin, shriveled and stiff. When a banana plant suffers from nematode disease, the nutrients in the body are continuously consumed by the nematodes, but it does not cause the plant to die. Most bananas that suffer from nematode disease start at the seedling stage.

Prevention and control methods: 1. Newly planted banana seedlings should be planted without covers, such as selling diseased tissue culture seedlings or disease-free bud sucking. For example, the use of professional, reputable vegetatively propagated seedling factories or sterilization of nematicide treatment after sucking buds (removing the rotten roots and soil of the sucking buds and disinfecting).

2. At the beginning of the disease, sprinkle nematicides around the banana head, and it is recommended to apply 100 times of 40% Boya line-killing phosphorus per plant, and 20-30 grams of 1000 ml or 10% gram of line-dan or 30-40 grams of 10% gram-phosphorus per plant. The pesticide is applied once a year before each new root occurs. It is best to apply the pesticide during or after the rainy season.

In case of drought, it is necessary to drench water after application, which is conducive to the penetration of the medicine into the roots.

3. After pesticide application, pay attention to foliar fertilizer supplementation. Because in the case of root damage and obstruction, rhizosphere fertilization has little effect. It is best to use foliar nutrition to promote the extraction of new roots, so that bananas can better recover the tree.

It is recommended to spray foliar fertilizer once every 10 days or so, and spray 2-3 times in a row. After the tree is restored, rhizoferization should be considered. Restore the affected plants to normal growth.