What happens when peppers always fall leaves, and what happens when peppers fall off leaves

Pepper defoliation refers to the formation of a layer of separation at the base of the petiole tissue, which is naturally separated from the living tissue without mechanical damage. There are many reasons for pepper leaf loss, such as weak light, dry soil, malnutrition, unsuitable temperature, and lack of certain trace elements, which can cause pepper leaf loss. Another important reason is caused by pathological factors, such as anthracnose and blight of peppers, which will cause a large number of leaves in peppers.

In addition, in the case of greenhouse cultivation in winter and spring, if the organic fertilizer that is not fully fermented is applied, and then encounters continuous rainy weather, the organic fertilizer in the soil produces a large number of toxic gases (ammonia, etc.) during the fermentation process, and if it is not ventilated in time, it is easy to fall leaves.

Once a pepper loses its leaves, it can severely reduce yield, especially in the early stages. To prevent leaf loss, you should first diagnose the cause and then take appropriate measures. At the same time, the occurrence of leaf fall should be prevented as much as possible in cultivation. In general, the following aspects should be noted:

1) Strengthen field management, according to the growth characteristics of peppers, timely apply fertilizer water, and strengthen ventilation and light transmission.

2) For early spring peppers, temperature and humidity management should be strengthened to reduce the humidity as much as possible.

3) Magnesium deficiency in the soil can cause leaf drop in peppers, magnesium sulfate can be used as base fertilizer, and magnesium sulfate aqueous solution can also be used for foliar spraying.

4) Pay attention to timely disease prevention, especially the prevention and control of pepper anthracnose, epidemic diseases and viral diseases.

5) In the early stage of pepper defoliation, the plants should be sprayed with Bordeaux liquid in time, sprayed once every 5 7 days, and sprayed 2 3 times in a row, which has a good effect on the prevention and control of pepper defoliation.

6) The applied organic fertilizer should be fully rotten and fermented, if the fully fermented organic fertilizer can not be applied for some reason, the application time of the base fertilizer should be as early as possible, generally should be about 20 days before planting ditch fertilization. After the seedlings are planted and the seedlings are slowed down, they should be ventilated in time to ventilate and ventilate the toxic gases out of the shed. In continuous rainy weather, more attention should be paid to ventilation, and the greenhouse must not be closed due to low temperature.

In recent years, with the increase of salinization in greenhouses, people have attached great importance to the use of some new fertilizers, including some organic granular fertilizers. However, sometimes due to the inattention to the application method, the seedling is poisoned, severe defoliation and other problems, especially in early spring or winter. Therefore, we must pay attention to the early application of basal fertilizer (applied 10 to 15 days before planting), and pay attention to ventilation on sunny days to eliminate some toxic gases; Cover the mulch film after planting, and pay attention to no air leakage (especially pay attention to the airtightness of the planting hole at the base of the seedling for toxic gases) to prevent toxic gases from escaping and harming the plants; In addition, ventilation should be carried out at the right time after colonization.

After some vegetable farmers found that the plant was poisoned, they hastily covered the mulch film without covering the mulch film tightly, especially at the base of the plant without sealing the mulch, so that the toxic gases in the soil were released through the only channel at the base of the plant, thus causing more serious poisoning. This needs to be fully paid attention to in the usual management.

Pepper trilope.

Fallen leaves, fallen flowers, fallen fruits. The main reasons are that the temperature difference is too large and the pollination is poor, which causes early flower and fruit drop. Unreasonable water and fertilizer, imbalance between vegetative growth and reproductive growth, resulting in flower and fruit drop. Flower and fruit drop caused by pests and diseases and physiological aging.

Prevention and control: reasonable fertilization, watering, timely prevention and control of pests and diseases. In case of rain, drain water in time and cultivate it. Reasonable planting density increases ventilation. Timely supplementation of micro-fertilizer in the later stage.

The possible reasons for pepper defoliation are: first, high temperature and high humidity are conducive to the occurrence and development of diseases;

Second, in the high temperature season, it is easy to encounter storms or even rain, which can lead to large occurrences, resulting in early leaf fall;

the third is the accumulation of water in the field, the planting density is too large, the pepper field is closed, and the incidence rate increases;

Fourth, the plant is fattened and prematurely senescent, and the growth potential is weak, which is conducive to the occurrence of diseases;

Fifth, pepper field continuous cropping. There were many remnants of the diseased strains left over from the previous stubble, which increased the source of overwintering bacteria and had a high incidence.

The phenomenon of falling flowers, fruits, and leaves in the fruiting period of pepper is called "three falls". The "three falls" have a great impact on the output. There are many reasons for the "three falls".

Generally speaking, early flower drop is mainly caused by low temperature and soil drought affecting pollination. The main reasons for the occurrence of "three falls" in the middle and late stages are: too much or too little nitrogen fertilizer causes branches and leaves to grow or malnutrition, too much density, insufficient light, high temperature and rain and waterlogging, and pests and diseases.

To prevent and control the "three falls", we must comprehensively improve the level of cultivation technology, and we cannot grasp a single measure. The main points should be as follows: (1) Cultivate strong seedlings.

2) Choose well-drained sandy loam soil, avoid continuous cropping, and implement crop rotation. (3) Proper dense planting, strengthen water and fertilizer management, so that the growth and development of plants are coordinated. (4) According to the temperature of the temperature, different concentrations of anti-falling elements are used to spray flowers.

5) Pay attention to the prevention and control of pests and diseases, common anthracnose, bacterial leaf spot and mite damage, causing fruit and leaf drop, you can use 500 times of methyl frost ketone, 400 times of anti-kuning solution, 1000 times dilution of dicofol, and 2500 times spray of mite.

The leaves of the pepper tree are wilted, and may be infected with wilt, so it should be prevented in advance, soil disinfection, reasonable fertilization to increase disease resistance, and 600-1000 times of potassium permanganate should be sprayed. It may also be infected with leaf mold, and it is necessary to destroy the diseased branches and leaves, and spray 800 times of methyl tobuzine on the pepper plant. It may also be infected with leaf blight, in the early stage of the disease, it is necessary to spray fungicides, which can be sprayed with drugs such as chlorothalonil suspension 800-1200 times**.

1. Blight.

Symptoms: The leaves on the pepper tree are all wilted, probably because of infection with blight, after the appearance of this disease, the leaves gradually turn yellow and wither from bottom to top, and a large amount of fall off, not only the leaves are affected, but the cortex at the base of the stem, which is in close contact with the ground, gradually begins to decay in a water-soaked manner, and eventually leads to the death of the whole plant.

Solution: Do a good job of preventive measures, choose varieties with good disease resistance to plant, carry out high-temperature soil disinfection, usually reasonable fertilization to enhance the disease resistance of plants, and wait until the pepper is sick, and then apply 600-1000 times of potassium permanganate.

2. Leaf mold.

Symptoms: The disease is more serious in the pepper fruit swelling period, starting from the bottom of the plant, the leaves first appear light yellow irregular markings, and then the leaves appear white mold layer, when severe, it will cause the leaves to wither, but also cause the fruit to become smaller and deformed.

Solution: Clean up the diseased branches and leaves in time and destroy the diseased branches and leaves. In the early stage of the disease, you can spray 800 times of methyl tobuzine solution on pepper plants**.

3. Leaf blight.

Symptoms: This disease can occur at both seedling and adult stages, mainly harming the leaves, resulting in lesions on the leaves, and then gradually expanding, and the leaves begin to wither.

Solution: In the early stage of the disease, it is necessary to spray fungicides, and drugs such as chlorothalonil suspension 800-1200 times can be used.

The above is the name of the disease of pepper leaf wilting, as well as the methods of prevention and control, there are many reasons for pepper leaf wilting1Physiological factors. Factors such as long-term low temperature and high humidity, high temperature and drought or too strong light, and the imbalance of fruit and leaf ratio will cause pepper leaf rolling, and if it is too dry or too long in water, it will also lead to dead leaves or even the whole plant wilts and dies.

2. Pests. Leaf curls caused by red spiders and aphids, and mite infestation can also lead to dead leaves if they occur. 3. Diseases.

The diseases that cause pepper leaf curling are mainly viral diseases, and the diseases that cause pepper leaf wilt are mainly pepper leaf blight. 4. Fertilizer damage and pesticide damage. Too much fertilization or heavy spraying can cause the leaves to curl at least and dry up the leaves at worst.

Pepper leaf drop is one of the main reasons for the limited yield of pepper, which can lead to stunted growth and few fruits, or the whole leaf will fall and the plant will die. Let's take a look at what happens to pepper leaf drop and how to prevent it.

Normal and abnormal defoliation of peppers

Peppers lose their leaves throughout the growing season. For example, in the later stage of fruiting, a small amount of yellowing in the middle of the main stem and a small amount of yellow leaves fall off, which is normal defoliation, and there is no obvious harm to the appearance. If there is a sudden appearance of a lot of fallen leaves during the growing period, it is necessary to check the cause in time.

What's going on with pepper leaves

The root cause of abnormal defoliation of pepper is mainly diseases, such as virus disease, charcoal maggot, sores and dementia disease, disease, downy mildew, early disease, ring disease, dark gray brown spot disease, etc., among which virus disease and charcoal maggot disease are the most serious.

Unreasonable planting management will also cause a lot of fallen leaves, such as too much precipitation, too much humidity in the field environment, "roots", and too thick fertilizer; insufficient nutrients and hydration; The seedlings are overcrowded and not exposed to enough sunlight; Seedlings grow steeply and have few roots: the planting technology is unreasonable; Drought for a long time, sudden watering under the scorching sun or heavy rainstorms; Incorrect operation of growth hormone can cause defoliation. In addition, the temperature is too high and too low, resulting in a wider range of flower and fruit drops.

How to prevent pepper leaf loss

In the case of leaf litter, the following different control measures should be used.

Disease control

Most of the diseases that cause defoliation are transmitted by seeds, so the seeds and fruits on the main stem without disease should be selected for seeding; Do a good job of seed disinfection and seedling disinfection before planting; Improve the analysis of pests and diseases, prevention and control, prevention is better than cure, and the prevention and control work starts from the emergence of seedlings.

Improve planting management

Adopt groove and high furrow planting to avoid flooding in the ground and maintain stable ventilation: cultivate strong seedlings, reasonable dense planting, and maintain stable ventilation and light transmittance; Scientifically fertilizer, nitrogen, phosphorus, potassium three elements of fertilizer, especially nutrient fertilizer, not too much or too little; Effectively raise irrigation, manipulate water flow and irrigation, timely control of pests and diseases, etc.

Adopt excellent varieties and improve temperature

We use excellent varieties with strong disease resistance and drought resistance (high temperature resistance, low temperature resistance and waterlogging resistance).

If the temperature is too low and the fruit drop is too high, you can spray the flowers with chlorophenoxycarboxic acid when it is in full bloom to reduce the flower and fruit drop.

The causes of pepper leaf loss can be started from moisture, temperature, light, diseases and pests; The prevention and control methods include reasonable watering, temperature control, pruning and fertilization, disinfection and sprinkling, etc.

1. The reason for the fall of leaves of peppers.

1. Moisture: Pepper is a crop that is neither cold tolerant nor waterlogging, if it encounters continuous rainy weather in the process of planting, pepper will be in a state of growth stagnation, and the root system is very prone to insufficient oxygen supply resulting in leaf drop. If there is a lack of water, it will also cause damage to the peppers, the leaves will lose water and wilt, and the peppers will also develop poorly.

2. Temperature: Pepper leaf fall may be caused by the sowing date, sowing too early or sowning in the wrong season, low growth temperature or more than 35, will cause leaf drop or even fruit drop. If there are continuous rainy days during the hot season, the high temperature and humidity will accelerate the degree of leaf fall.

3. Light: The acquisition of light is closely related to the planting density, if the planting density is too large, the plant branches are too much, compete with each other for nutrients, closed and impermeable, and the lower leaves will fall due to insufficient light.

4. Pest and disease hazards: Diseases are one of the most common causes of pepper leaf loss. High humidity, high temperature, and poor ventilation are the most prone to diseases, and the former will cause a large area of necrosis along the leaf veins, resulting in defoliation; The latter will form a layer of white powder on the back of the leaf, and brown or yellow spots will form on the surface, which will lead to defoliation.

Second, the prevention and control method of spicy pepper leaf litter.

1. Reasonable watering: peppers should be watered with small water, not flooded with large water, and it is best to choose morning and evening watering. On rainy days, the waterlogged plots should be drained in time to reduce waterlogging; In times of drought, water in time to increase moisture to ensure the normal growth of peppers.

2. Control temperature: If the leaves and fruits are caused by temperature, field management can be strengthened, and measures such as shading, watering and cooling can be taken.

3. Pruning and fertilization: adjust the density in time and uproot young plants. Knock off the lower old leaves or carry out proper pruning to facilitate ventilation and light, and control the amount of nitrogen fertilizer, prevent the growth of peppers, ensure the balanced supply of nutrients, and avoid premature aging and crazy growth of pepper plants.

4. Disinfection and sprinkling: disease is the main reason for the defoliation of pepper seedlings, so the seed disinfection treatment before sowing can not be ignored, and it is found that the pesticides should be sprayed in time to prevent and control it in the later stage.

Characteristics of chili peppers

Peppers are long and thin, usually red, yellow, green, or purple, and some varieties have patterns or spots. The leaves of peppers are usually pinnate compound leaves with serrated edges and smaller leaves. Peppers produce small white flowers that usually bloom in the summer.

Chili peppers prefer a warm, humid environment and are suitable for growing at a temperature of around 20-30. Chili peppers can be grown in a variety of soils, but it's best to choose one that is rich in organic matter and nutrients. The flavor and spiciness of chili peppers vary depending on the variety, with some varieties being very spicy and others being relatively mild.

Generally speaking, the spiciness of chili peppers is determined by the amount of capsicum in it, and the higher the spiciness, the higher the capsaicin content.

Lack of moisture. Causes of deciduous peppers.

2.Moisture Pepper is a crop that is neither cold tolerant nor waterlogging, if there is continuous rainy weather in the process of planting, photosynthesis will become worse, and respiration and transpiration will be reduced accordingly.

3.Temperature This is mainly caused by the sowing date, sowing too early or staggered seeds, and growing temperatures low or more than 35. Will.

4.Control measures for pepper leaf litter.

5.Reasonable watering, small water irrigation, do not flood irrigation, it is best to choose morning and evening watering, rainy days, the waterlogged plots should be drained in time to reduce waterlogging damage for the groundwater level high scale crack area.