Cherry tomatoes have leaf mold, how to treat it?

Introduction: Farmers and uncles are very hard to grow crops, and they will face a variety of problems, and I believe that there will be different pests to harm the crops in different seasons. At this time, you can spray some pesticides on crops, so that you can effectively prevent the disaster of diseases and insects, so how to prevent and control leaf mold in cherry tomatoes?

By consulting the relevant information, we can understand that cherry tomato leaf mold, also known as cherry tomato black mold, is a fungal disease, so how to control it? The first thing is to understand the disease, starting from the middle and lower leaves and gradually expanding to the upper leaves. There are oval or irregularly shaped large yellow or green spots on the front of the leaves, and here are some opinions that I hope will help you solve the problem.

Consult the information, by consulting the relevant information, you can understand that there are many symptoms of cherry tomato leaf mold, if it is a dry damage symptom, you can find that the cherry tomato stem is damaged by leaf mold, and the young stem and leaf C will appear oval or irregularly shaped brownish-green spots. Moreover, under the right conditions, mold can also grow on the front of the lesion, resulting in the drying of the stem. If it is a symptom of fruit damage, it is possible to detect uneven spots that are nearly circular and hardened.

Consult with a professional to understand that control methods are very troublesome, first of all, you need to choose a good disease-resistant cherry tomato variety, and the seeds need to be sterilized before planting. In order to remove the internal and external germs, it is necessary to soak in warm water at 55 degrees Celsius for 30 minutes, cool it in cold water and soak it in potassium permanganate for 30 minutes.

It is believed that it is necessary to spray pesticides before the onset of leaf mold disease, and 2% Wuyi mycin water can be used, and the amount of pesticides per hectare is 975 liters during the prevention and control, and it is sprayed once every 10 days. Three times in a row, and the agent needs to be used continuously or alternately, so that the crops will not be affected by pests and diseases.

You can use special pesticides for leaf mold, you can ventilate more, pay attention to the problem of light conditions, and water according to the soil conditions.

You can buy some ** leaf mold drugs and spray cherry tomatoes, so that you can ** the diseases that appear in cherry tomatoes.

First of all, it is necessary to choose the right pesticide according to different planting varieties, and then you can also choose the way of foliar spraying of pesticides, and there is to ensure the temperature of planting, which needs to strengthen management, and there is to timely weeding, and then you also need to fertilize in time.

Cherry tomatoes are also tomatoes, and there is no difference between leaf mold in cherry tomatoes and leaf mold in non-cherry tomatoes. Leaf mildew in cherry tomatoes or other tomatoes is caused by an infestation of the fungus Brown Sporum fungus. Tomato leaf mold, also known as black mold, is a worldwide disease.

As the disease spreads, the leaves gradually curl from the bottom to the top, and the plant is yellowish-brown and withered. The fruit is infected, and black round or irregular patches are formed near the fruit pedicle or on the fruit surface, hardened and sunken, and cannot be eaten. Young stems or fruit stalks are infected with symptoms similar to those of leaves.

Disease-free seeds can attenuate the initial infestation caused by seed carriers in the field. The introduction of seeds requires seed treatment and soaking in warm water. Taking advantage of the difference in heat tolerance between seeds and pathogens, the temperature that can kill the internal and external pathogens of the seeds without damaging the vitality of the seeds is selected for disinfection.

It also has a beautiful and charming appearance, it is not only a good taste in the dish, but also a beautiful product in the fruit, and has a variety of functions. Both the elderly and children like to eat, the elderly eat tomatoes, which can prevent butterfly spots or age spots, and children eat tomatoes to help gastric juice digest fats and proteins.

In the early stage, there are green spots on the back of the leaves, and in the later stage, they become gray or black-purple irregular mold layers, and the front of the leaves turn green and yellow in the corresponding parts, and when they are serious, the leaves often appear dry and shrink, and from the order of the disease, they often spread upwards from the lower part of the plant, and the temperature is from 9 to 34. Prevent high humidity and low temperature, create conditions that are not conducive to the occurrence of diseases, so as to control diseases, strengthen water management, water a small amount of water at the seedling stage, plant and water thoroughly, do not water before flowering, water less during flowering, water thoroughly after fruiting, drain moisture immediately after watering, try to make the leaf surface not dew, or shorten the dew condensation time.

In severe cases, it also harms stems, flowers and fruits, and the leaves are diseased, with yellow-green spots on the front of the leaves and inconspicuous edges on the front, gray-white mold on the back of the leaves, and light brown to dark brown on the back of the leaves; When the humidity is high, the mold layer can also grow on the surface of the leaves. The disease is often taken out of the park by the lower leaves to be destroyed first, and 40% Fuxing 4000-6000 times is sprayed once, or 600 times of 50% Limocon wettable powder or 800-1000 times of 70% methyl tobuzin, this drug is sprayed as far as possible to prevent the germs from producing resistance, and the prevention and control effect cannot be achieved.

The first thing is to remove all these diseased leaves and clean them up to prevent contamination of other plants. Be sure to make sure that the air circulation can better allow it to drain excess sewage. The seeds can be sterilized by one.

Make a crop rotation on diseased soil. Clean up some dead branches and leaves. To have a good ventilation.

Some pesticides can be used for spraying.

First of all, spray pesticides on cherry tomatoes in a timely manner, and then disinfect and sterilize the cherry tomatoes planting environment with some sulfur, and then we must turn over the soil more, put some pesticides on the soil, strengthen ventilation management, and then water an appropriate amount of water.

When watering, it should not be too wet, it is necessary to ventilate the plants in time, drain them in time, and the density should not be too dense when planting, and the distance should be appropriately spaced.

When you encounter such a thing, you should go to a professional place, buy some insecticides or drugs to treat this disease, and then spray them regularly.

The usual practice is to spray the agent. This method is generally used in the early stage of the disease, and we should use it after we find it. For the use of methods according to the use of some pesticides we choose to use, after all, different pesticides have different proportions, the degree of dilution is not the same, some dilution is about 100 150 times, some are 800 times, so according to the instructions of the pesticide to use.

After using a pesticide spraying, it should be carried out again after a week to strengthen prevention, after all, every spraying of pesticides can not be completely thorough, it needs to be strengthened, and the problem can be completely solved after 1 2 times. <>

You can also use some powder to prevent and control, the powder is lost, that is, it needs to be sprinkled on this land, and it takes about two to three catties per mu. However, I personally don't like to use powder, after all, I need to wear a mask when using powder, and sometimes it makes my clothes more troublesome, and the powder needs to be used alternately, so I can't use just one, after all, I am worried that this drug resistance will be troublesome. <>

If it is planted in a greenhouse, then you can use this way of medicinal fumigation, after all, the greenhouse is relatively closed, and it will work with this medicinal fumigation, if it is not planted in a greenhouse, then this method will not work. <>

For the planting of some crops, there are some diseases, it is nothing more than because we are not very well managed, whether it is watering, this ventilation and this nutritional supplement, there will definitely be certain problems. To prevent the occurrence of this disease, we must strengthen this management, such as proper fertilization, such as proper watering, and control the temperature and humidity in this planting area, so that we can effectively avoid the occurrence of some fungi, and we can also avoid the occurrence of some mildew when we are in the same tomb. If the temperature is low and too humid, it is indeed easy to have some mold.

Dead leaves can be pruned, or Zhaoli suspects are in a reasonable rotation of the hands of the Jin, can clean the surrounding dead leaves, can be rotten in the soil and sprinkled with powder, or frequent ventilation, can be effectively controlled.

To choose the right varieties for planting, we must pay attention to the use of pesticides, the use of water and rotten fertilizer, watering, fertilization, and scientific methods for poor management and lead deficiency.

First of all, we should prescribe the right medicine, choose the right pesticides, spray some insecticides and herbicides regularly, and we should water and fertilize in time to increase the fertility of the soil to ensure sufficient light, and should also do the work of drainage and ventilation.

Harm of cherry tomato leaf mold

Cherry tomatoes were the most affected, followed by large pink fruits, and finally large red fruits. Depending on the variety, the degree of damage varies. The disease of Sun Jiao Luyou has a fast onset rate, mainly harms the leaves of plants, and can harm fruit stalks, sepals, petioles and stems at the same time when the disease is severe.

Leaf damage, generally from the middle of the plant disease, slowly expand down to the young leaves, the front of the early leaf can be seen yellow-brown annular or irregular lesions, the back of the leaf appears light brown mold layer, with the further expansion of the disease, the color of the mold layer slowly aggravated, you can see light brown - yellow-brown with the pin - partial brown or white-brown different color change process, but when large-scale disease, the color of the mold layer is yellow-brown.

When the disease is severe, it can also cause damage to the leaf stem and some young stems, causing the leaves to wither and roll, which seriously endangers the growth of the plant. The fruit is damaged, and a light brown mold layer appears in the calyx of the fruit, causing the calyx to roll up, which harms the yield of the fruit, especially the cherry tomato. In more severe cases, it can cause young fruits to fall.

In the greenhouse that has been cropping cherry tomatoes for many years, the soil is heavy, the greenhouse equipment is aging, the ventilation and light transmittance are poor, and the species with poor disease resistance are planted, which can cause the disease.

Prevention and control methods

Create an excellent growth environment, moderately apply organic fertilizers with high chaff manure content to the soil with heavy clay, improve the soil environment, and avoid the bad environment of obstructed drainage and excessive humidity in the shed. On the basis of increasing yield and disease resistance, comprehensively carry out species selection, and select species with strong resistance to adverse effects, which is also an important part of avoiding cherry tomato leaf mold, so we can not only blindly pay attention to yield and species, but also consider multiple factors when selecting species.

Pay attention to reasonable transplanting density, maintain effective light transmission and ventilation in the shed, and reduce the infiltration and spread of diseases. When using drugs, prevention and treatment should be the main thing, and the rational use of drugs should be understood. For example, in the early stage of the disease, before and after rainy weather, it is a critical period for medication, and drugs can be reasonably selected for use according to the condition of individual greenhouses.

When tomato leaf mold first occurs, some green spots will appear on the back of the tomato leaves, and some gray or black-purple irregular mold layers will be bred on the lesions later, and the front damage part of the leaf will gradually fade green and yellow, and the high temperature and high humidity environment is easy to cause leaf mold, the most suitable climatic conditions for the onset of the disease are temperature 20 25, relative humidity of more than 95%! When the environment is suitable, a large number of conidia are produced in the diseased area, and the conidia are transmitted by air currents!.

Therefore, in the prevention of tomato leaf mold, we should first pay attention to keeping the drainage in the field smooth, the air flow is good, refuse to sit together, and rotate with cucumbers, non-Solanaceae crops. Because tomato leaf mildew will overwinter in the diseased residue, it is necessary to pay attention to the disease law of cleaning up the dead branches and leaves of crops in the field, and the disease temperature is mostly 20 26 degrees, and the air humidity is about 90% The most likely to break out, especially in rainy days, high humidity and high temperature environment is the most serious. The disease is mainly caused by injured leaves, which has a direct impact on the reduction of tomato yield.

First, choose disease-resistant varieties. Second, the seeds are sterilized and soaked in warm water at 52 degrees for 3o minutes. Third, seedbed disinfection, disinfection with carbendazim, dysenammonium can also be disinfected with chlorothalonil, Sukelin smoke agent.

Fourth, strengthen the management of non-solanaceae vegetable rotation, and comprehensive measures should be taken to control the temperature and humidity in cultivation management, such as the selection of disease-resistant varieties or disease-free seeds, and seed disinfection; Seriously ill greenhouses must be rotated with non-solanaceae crops for more than two years; Diseased greenhouses can be fumigated with sulfur before planting; After harvesting, the residues should be thoroughly removed and the soil should be turned deeply.

When the tomato growth environment temperature is 4 32 diseased leaf mold and pathogens can grow, 20 25 is the most suitable, the temperature is about 22, and the humidity is more than 90%, and the disease occurs seriously. High humidity in the protected area, or continuous rainy days, and weak sunlight are also conducive to the occurrence and development of diseases. Seeds can be sterilized with 55 warm water, or 70-75 hot water blanching, pay attention to two containers to dump back and forth, until the water temperature is 55, and keep the water temperature of 55 for 7-8 minutes.

You can use some leukomycetes, you can also spray leaf mold, you can use carbendazim, or promehydrate, and apply some biological bacteria fertilizer to the soil.

You can spray some pesticides reasonably, prevent them, solve many problems, and fertilize them on time to protect the cleanliness of the field, work hard to clean up weeds, water them on time, and choose the right varieties for planting.