How to control capricina botrytis cinerea? Greenhouse pepper fighting gray mold cold not dry has an

Botrytis is a common and harmful disease in the cultivation and production of pepper in protected areas. Bell pepper, pepper seedlings, leaves, stems, branches, and flowers can be infected with gray mold. When the seedlings are infected with the disease, the tip of the cotyledons turns yellow, and then expands to the young stems, causing the stems to shrink and become thinner, and the diseased parts are broken and die.

The leaf is diseased, from the leaf edge to the inward V-shaped expansion, the lesion is water-stained at first, the edge is irregular, and then it is brown-brown, the adult plant is infected, the initial water-stained irregular spot on the stem, and then becomes gray-white or brown, the lesion surrounds the stem for 1 week, the upper end of the branch and leaf wilts and dies, and the surface of the diseased part is gray-white mold. In the fruiting stage, the incidence of pepper and pepper is mostly manipular, and brown water-stained lesions are formed on the top or pedicle of young fruits. The diseased part is depressed and rotten, dark brown, and has a gray mold layer on the surface.

The damage is less in the adult stage of open field cultivation. This disease is an epidemic disease caused by the fungus Botrytis cinerea.

Prevention and control methods: Ventilation management should be strengthened to protect sweet (spicy) peppers to reduce the humidity in the shed.

In the early stage of the disease, watering should be moderated appropriately to prevent overwatering.

After the onset of the disease, the diseased fruits, diseased leaves and side branches should be removed in time, and burned or buried deeply.

Pharmaceutical prevention and control. The shed can choose 10% Suclin fog, 250 300 grams of smoke per 667 m2 each time, once every 7 days, 2 3 times in a row or alternately. In the early stage of cultivation after cultivation, 1500 times of 50% promethane wettable powder, 2000 times of 50% Suclin wettable powder, 50 liters of good liquid medicine can be sprayed every 667 meters, once every 7 10 days, and 2 3 times of continuous prevention and treatment depending on the condition.

In the prevention and control of pepper gray mold, the following five points should be noted: Mulch film cover cultivation, the implementation of dark irrigation under the film, pay attention to the plant density is not too large. Apply enough manure and top dressing in a timely manner.

Proper control of irrigation and strict prevention of flood irrigation. Do a good job in the temperature and humidity control of the shed and indoor, that is, try to maintain a higher temperature in the morning to atomize the dew on the roof of the shed, appropriately extend the air release time in the afternoon, increase the air volume to reduce the humidity in the shed, and appropriately increase the temperature at night to reduce or avoid foliar condensation. Remove or remove diseased seedlings, diseased leaves, diseased side branches, diseased flowers, and diseased fruits in a timely manner, and bring them out of the shed to be buried and destroyed to reduce re-infection.

Pharmaceutical prevention and control. You can choose 50% Pythium WP 1500 times, 75% chlorothalonil WP 600 times, 50% domethoxin 1000 times, 50% iprodione wettable powder 1500 times, 70% thiophanate-methyl WP 800 times. After the first spray, spray again at an interval of 7 to 10 days, spraying 2 3 times in a row.

1) Strengthen cultivation management. Crop rotation was implemented, soil disinfection was carried out before planting, and seedlings were soaked for 10 to 12 minutes with 300 400 times of 65% zinc wettable powder before planting. It should not be too dense when planting, and nitrogen fertilizer should not be applied during the growth period.

Potted plants should be replaced with new culture soil once a year.

2) Pharmaceutical prevention and control. In the early stage of the disease, the diseased leaves, branches, buds and diseased flower buds were removed in time, and then sprayed with 50% dysammonium 800 1000 times. In addition to the affected area, the focus of spraying is also on the soil surface.

Spray once every 15 days or so, spray 2 or 3 times in a row, you can achieve good control effect.

Pepper seedlings become diseased, the young stems shrink and become thinner, the cotyledons rot, and the seedlings fold and die. Adult plants are diseased, mostly in the stem of the irregular water-soaked lesions, and then brown to gray-white, when the lesions extend around the stem, the upper branches and leaves wilt and die. When wet, there is mold on the surface of the diseased area.

The fruit is diseased, forming brown water-soaked lesions on the top of the young fruit or near the pedicle, and the diseased part will soon rot in a large area, dark brown, and a gray mold layer will be produced on it.

Summary. Hello, when the greenhouse pepper fights gray mold, it is an effective control method to cool and not dry. Because Botrytis is a disease caused by fungi, which have a strong ability to grow and reproduce in humid environments, maintaining a dry environment can effectively reduce the occurrence of Botrytis cinerea.

Cool but not dry refers to taking appropriate ventilation measures in the greenhouse to allow air circulation, reduce humidity, and avoid the growth and reproduction of pathogenic bacteria in a humid environment. In addition, plant growth regulators and other agents can also be used for control, but pay attention to the amount of pesticides and how to use them, so as not to cause adverse effects on plants. In short, in the greenhouse pepper planting, it is necessary to pay attention to maintaining a suitable temperature and humidity, remove the diseased plants in time, strengthen ventilation, and do a good job in the prevention and control of pesticides, so as to effectively prevent and control gray mold.

Hello, when the greenhouse pepper fights gray mold, it is an effective prevention and control method to crack the Zen wheel and not dry the friends. Because Botrytis is a disease caused by fungi, which have a strong ability to grow and reproduce in humid environments, maintaining a dry environment can effectively reduce the occurrence of Botrytis cinerea. Cool but not dry refers to taking appropriate ventilation measures in the greenhouse to allow air circulation, reduce humidity, and avoid the growth and reproduction of pathogenic bacteria in a humid environment.

In addition, plant growth regulators and other agents can also be used for control, but pay attention to the amount of pesticides and how to use them, so as not to cause adverse effects on plants. In short, in the greenhouse pepper planting, it is necessary to pay attention to maintaining a suitable temperature and humidity, remove the diseased plants in time, strengthen ventilation, and do a good job in the prevention and control of pesticides, so as to effectively prevent and control gray mold.

Hello, in addition to being cool and dry, there are some ways to prevent and control greenhouse pepper gray mold, including: removing diseased plants: timely detection and removal of diseased plants to avoid the spread of diseases.

Strengthen ventilation: keep the air circulation in the greenhouse, reduce humidity, and avoid the growth and reproduction of pathogenic bacteria in a humid environment. Use of Potions:

Plant growth regulators, fungicides and other agents can be used for prevention and control, but it is necessary to pay attention to the amount of pesticides used and the method of use, so as not to cause adverse effects on plants. Do a good job in soil management: maintain soil air permeability and water retention, and avoid overly wet soil, which can cause disease breeding.

Strengthen plant maintenance: regularly fertilize plants to enhance plant immunity and prevent the occurrence of diseases. In short, when planting greenhouse peppers, it is necessary to do a good job in pest control, maintain suitable temperature, humidity and nutrients, and strengthen plant maintenance to ensure the yield and quality of peppers.

A vegetable farmer asked, "What are the symptoms of gray mold when planting peppers in winter?" How to effectively prevent and control? "In winter, the greenhouse pepper, due to the low temperature, weak light, rainy and rainy, resulting in a large temperature and humidity in the greenhouse, as well as poor drainage of the plot, partial application of nitrogen fertilizer, etc., are easy to cause pepper gray mold disease, it is a common bacterial disease of pepper.

Generally speaking, gray mold is susceptible to occur in all growth stages of peppers, and the leaves are yellowed first, then spread to the stems, and fold from the diseased part to die. At the stage of adult plants, gray mold appears, generally from the tip of the leaf, the leaves gradually yellow, and the formation of V-shaped lesions, the stem appears water-stained lesions, and the above part of the disease gradually dies; After pepper fruit is infected, brown spot fruit is often formed, which affects the yield and quality of pepper.

So, how to effectively control pepper gray mold and ensure high yield and high quality of pepper? Share 2 cultivation management methods:

1. Agricultural methods.

When encountering continuous rainy weather, it is recommended that vegetable farmers close the shed every day and take warming measures to make the shed temperature reach about 30, and then stuffy the shed for 30-60 minutes, and then properly ventilate for 2-3 hours to reduce the temperature and humidity in the shed, avoid the humidity in the shed exceeding 90%, and help to inhibit the occurrence of gray mold.

In addition, vegetable farmers should apply fertilizer reasonably, and under the premise of ensuring the nitrogen demand for plant growth, try to control the partial application of nitrogen fertilizer, and control water management at the seedling stage, so as to avoid excessive canopy closure caused by the growth of seedlings and affect the ventilation and lighting between plants. Under the condition of sufficient base fertilizer, nitrogen fertilizer can be applied 3-4 times, and the amount of each time does not exceed about 10 kg per mu, and a small amount of nitrogen fertilizer can be applied as much as possible.

2) Pharmaceutical prevention and control.

In the early stage of pepper gray mold, vegetable farmers can timely spray 50% promethine suspension 1000 times, or 50% Sukelin powder 1500-2000 times, or 25% mold powder 1500-2000 times 2-3 times, each time can be used in pairs, with an interval of 7-10 days, the control effect of pepper gray mold is more obvious.

It is very likely that a nearby crop has a pest or disease that has spread to the pepper. Plant insecticides should be used in a timely manner, evenly sprayed on plant leaves, and should not be watered during the medication, otherwise there will be no effect.

Pepper gray mold is one of the more common diseases in the process of planting peppers, its onset period is between December and May of the following year, the pathogen prefers low temperature, high humidity environment, so it is easy to get sick in rainy days in winter and spring, and can lead to plant death in severe cases. 1.Strengthen the ventilation of greenhouses and greenhouses.

Watering should be carried out in the morning on a sunny day, and the amount of water should be controlled and not excessive. After the rain, the stagnant water should be removed in time, and the shed should be reasonably ventilated and cooled; 2.Removal of the source of bacteria.

Remove the diseased fruit in time and take it out of the greenhouse and greenhouse to bury it deeply. After harvesting, the diseased plants are thoroughly treated, and the diseased leaves and branches are turned deep into the depths. Mulching cultivation can reduce the occurrence of gray mold. 3.

Pharmaceutical prevention and control. For the disease of plants in the protected area, 250-300 grams of 15% Pythium fumigant can be smoked, smoked once every 5-7 days, and smoked continuously or alternately 2-3 times. It can also be used 70% pyrimelamin water dispersible granules 1000-1500 times, 50% chlorobromoisocyanuric acid soluble powder 750-1500 times of the prevention and control effect of gray mold, and at the same time prevent and control various complications, there is also a special effect on bacterial diseases, spray once every 7-10 days, spray 2-3 times continuously depending on the condition.

If the field is humid, the ventilation and light transmittance are poor, and the temperature is low, pepper gray mold is prone to occur.

Reasonable crop rotation, 2-3 years of rotation with other vegetables. Reasonable watering, improve the environment, prohibit flood irrigation, rain should be drained in time, reduce humidity.

You can use mildew or liangguoan 30 50 ml plus 25 ml of garlic water plus 15 ml of garlic water mixed with about 30 catties of water to spray regularly, and these drugs are green drugs that kill fungal bacteria, whiteflies and mealflies, and belong to traditional Chinese medicine preparations.

Winter and spring greenhouse seedlings should pay special attention to the occurrence of the disease, once the occurrence of pepper gray mold, should take the necessary measures in time to reduce the loss to a minimum soil frog commonly known as field chicken, the current artificial breeding of soil frogs is mostly black spotted frog (a kind of soil frog), in order to solve the problem of protecting wild frogs, detailed headlines planting and breeding miscellaneous talk to get rich.

Botrytis cinerea. It mainly harms leaves, stems, and young fruits.

The leaves are damaged, and the leaf margins are water-invaded brown lesions, which are round or oval in shape, brown with light brown ring lesions, and gray mold layer when the humidity is high.

The stem is damaged, forming water-soaked irregular lesions, grayish-white or brown, and the lesion has a grayish-white mold layer.

Water-soaked brown lesions are produced on the top of the affected young fruit and near it, which are dark brown after enlargement, and there is a gray mold layer on the surface.

In the early stage of prevention and treatment, trichloroisocyanuric acid, allicin, polyantimycin, pythium, prochloraz and other drugs can be used alternately for prevention and control.

Good morning! The main symptoms of cayenne pepper gray mold:

At the seedling stage, it is harmful to leaves, stems and terminal buds, and the apex of the diseased first cotyledons turns yellow, and then expands to young stems, shrinks and becomes thinner, and often falls down from the diseased part and dies. The adult stage is harmful to leaves, flowers and fruits. Most of the leaf damage starts from the tip of the leaf, initially becomes a light yellow-brown lesion, and gradually expands upwards into a "V" shaped lesion.

The stem produces water-stained lesions, and the diseased part dies above. The flowers are damaged, and the petals are wilted. Fruit damage, mostly starting from the adhesion between the young fruit and the petals, is a water-stained lesion, and causes brown spots in the whole fruit after expansion.

The junction between the sick and the healthy is obvious, and there is a gray-brown mold layer in the diseased part.

Peppers and bell peppers cultivated in greenhouses and greenhouses are prone to dirt mildew. Dirty mildew mainly damages leaves, petioles and fruits. When the leaves are infected, the leaves are initially stained with brown round or irregular mold spots, and then form soot-like substances, which can be covered with leaves, petioles and fruit surfaces, and in severe cases, green leaves and fruits are almost invisible.

The diseased leaves wither or fall off early, and the fruits ripen early but do not fall off. Dirty mildew disease in greenhouses and other protected areas generally occurs locally at first, and then gradually spreads.

Dirty mildew is a fungal disease, and the control measures are as follows:

1) Choose disease-resistant varieties.

For pepper and bell pepper varieties cultivated in protected areas such as greenhouses, special varieties for cultivation in protected areas with good disease resistance should be selected, such as Sujiao No. 5 and Dongchun No. 1.

2) Strengthen the temperature and humidity management of greenhouses.

Deep ditches should be opened around protected areas such as greenhouses, which can be drained in time after rain. Strengthen ventilation and light transmission to reduce the humidity in the shed. (3) Removal of sick and residual objects.

Remove locally damaged plants, leaves, fruits, etc. in a timely manner, and destroy them in a centralized manner or bury them deeply. After harvesting, the fields are cleaned to stop germs from overwintering in the soil.

4) Pharmaceutical prevention and control.

In the occurrence period of spotting, spray with 40% sterilized dan wettable powder 400 times or 40% Dafudan wettable powder 500 times, 50% benmonyl wettable powder 1500 times, 40% carbendazim gel suspension 600 times, 50% carbendazim (carbendazim plus vanmycolin) wettable powder 1500 times liquid, 65% methamalene wettable powder 1500 2000 times liquid spray, spray once every 15 days, 2 times in a row, and stop spraying 15 days before harvest.