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Prevention or Control of Vegetable Diseases in Greenhouse

2021-08-05

Many farmers have rich experience in vegetable cultivation, but for the problem of vegetable planting dead trees, there are still lingering fears. Dead trees have become a major problem for most farmers. The reason is simple: if the vegetable is planted, there will be dead trees at the beginning, but not for the harvest and harvest. Small impact, one or two may not be how, but generally speaking, dead trees are absolutely not one or two, most of them are a large area.
 
 
 
Causes of death
 
(1) soil-borne diseases
 
Soil-borne diseases are the main causes of vegetable withering and death. Whether fertilizer burning root, water-borne root, or soil compaction and poor air permeability, they will lead to root injury and decline of stress resistance, thus creating a good opportunity for pathogenic bacteria infection, and then soil-borne diseases, namely root rot, blight, stem-based rot and so on. During vegetable vigorous growth period, the leaves at the bottom are yellowish or dull, the fruit is thin and color is not good, there are many malformed fruits, early attenuation of production, the surface phenomenon is malnutrition, insufficient fertilizer supply, very similar to the deficiency of nutrients, in fact, most of them are caused by reduced decay of capillary roots, and no more fertilizers can be absorbed.
 
 
(2) Soil problems
 
Soil salinization or acidification is serious
 
In the process of vegetable production, the blind pursuit of yield and excessive fertilization result in more than one third of the chemical fertilizer can not be absorbed by plants.
 
When salinization is high, capillary roots grow poorly or die quickly, root water absorption is difficult, and even backflow, leaf wilting, yellowing and poor Fruit Coloration occur.
 
 
 
Facility greenhouse is a protective production facility for vegetable cultivation in the season when the environment is not suitable for vegetable growth. It can create suitable microclimate conditions for vegetable growth and development. The changes of environmental conditions are complex. Besides the adverse factors such as low temperature, weak light, high humidity, continuous cropping and blind fertilization, there is another phenomenon that can not be ignored, namely, soil salinization and soil acidification.
 
(3) Environmental humidity problem
 
At present, the main symptoms of vegetable seedling death are brown and soft rot at the base of stem and dark green leaves. From the description of symptoms, it can be judged that it is caused by blight. Over-watering has a great deal to do with:
 
First, the root system of hot pepper is underdeveloped, and watering too often after planting results in the root system not sticking, so that the plant growth is weak and disease resistance is reduced.
 
Second, excessive watering caused excessive soil moisture, high temperature and humidity environment created favorable conditions for the reproduction of pathogenic bacteria, coupled with the original plant growth is weak, two favorable conditions are very conducive to the infection of pathogens. Third, the spread of Blight with water, watering accelerated the spread of the disease.
 
We know the cause of the disease, and I recommend that users take the following preventive measures:
 
The first is to control watering and avoid the spread of disease. Proper water control in the early growth stage of pepper can promote root root system to take root and lay a good foundation for the cultivation of strong roots. At the same time, water control combined with paddling hoe can improve the permeability of soil.
 
 
 
Secondly, strengthen ventilation and dehumidification. During the day, the air outlet is widened, the ventilation is strengthened, and the sunshade net is covered to cool down, so as to create environmental conditions that are not conducive to the reproduction of pathogenic bacteria.
 
Thirdly, strengthen the illumination - artificial illumination.
 
Light supplement is particularly important. According to the summary of research and production practice, we generally divide the disaster into three levels.
 
1. Light grade: No sunshine for 3 consecutive days; or 3 consecutive days without sunshine for 4 consecutive cloudy days. At this time, diseases such as cucumber, tomato, pepper and downy mildew began to appear.
 
2. Intermediate: No sunshine for 4-7 days in a row; or sunshine duration < 3 hours for more than 7 days in a row; or 2 times of light oligoirradiation in January, when diseases such as cucumber, tomato, pepper and other common occurrence, but through chemical control measures can still be controlled.
 
3. Severe successive cloudy days (> 8 days); or sunshine hours (< 3 hours) for more than 10 days; or two intermediate oligopolies occurred in January. At this time, 10% to 20% of the diseases were difficult to control, and most of the diseases appeared yield reduction, and continued to develop.
 
Laser plant growth lamp has the function of providing effective light to green plants. The time can be set arbitrarily. It can prolong the effective time of photosynthesis of plants every day, especially in rainy and foggy days, which can make plants grow normally. It can also be used in seedling plants and plant factories.
 
 
 
Laser plant light supplement series products are laser lamps with rare earth materials as light source, which can solve the problems of short sunshine time in winter, fog and haze, rainy and snowy days caused by insufficient external illumination, such as intelligent greenhouse, greenhouse vegetables and fruits growing slowly, low yield, late maturity and so on. Like sunlight, it is conducive to plant growth and plays a great role in increasing crop yield, increment and efficiency.
 
Fourth, the treatment of disease drugs - dipping plate treatment.
 
 
 
Especially some infectious diseases will have better preventive effect. By dipping dish, many roots can be eliminated, and pathogenic problems caused by the matrix can be eliminated. These are very good effects. On the other hand, some harmful fungi in the soil can be blocked and carried out during the whole slow seedling period. Renovation. Nowadays, many products such as dipping plates are probiotics. These types use some fungi to inhibit the growth of harmful bacteria, promote the growth of roots and then prevent diseases. There are also some fungicides of protective type, which basically need to be soaked through, so we should pay attention to the amount of drugs as well. Concentration.
 
Disease prevention and control is mainly prevention, supplemented by drug treatment.

Related tags:

Prevention or Control of Vegetable Diseases in Greenhouse

Many farmers have rich experience in vegetable cultivation, but for the problem of vegetable planting dead trees, there are still lingering fears. Dead trees have become a major problem for most farmers. The reason is simple: if the vegetable is planted, there will be dead trees at the beginning, but not for the harvest and harvest. Small impact, one or two may not be how, but generally speaking, dead trees are absolutely not one or two, most of them are a large area.
 
 
 
Causes of death
 
(1) soil-borne diseases
 
Soil-borne diseases are the main causes of vegetable withering and death. Whether fertilizer burning root, water-borne root, or soil compaction and poor air permeability, they will lead to root injury and decline of stress resistance, thus creating a good opportunity for pathogenic bacteria infection, and then soil-borne diseases, namely root rot, blight, stem-based rot and so on. During vegetable vigorous growth period, the leaves at the bottom are yellowish or dull, the fruit is thin and color is not good, there are many malformed fruits, early attenuation of production, the surface phenomenon is malnutrition, insufficient fertilizer supply, very similar to the deficiency of nutrients, in fact, most of them are caused by reduced decay of capillary roots, and no more fertilizers can be absorbed.
 
 
(2) Soil problems
 
Soil salinization or acidification is serious
 
In the process of vegetable production, the blind pursuit of yield and excessive fertilization result in more than one third of the chemical fertilizer can not be absorbed by plants.
 
When salinization is high, capillary roots grow poorly or die quickly, root water absorption is difficult, and even backflow, leaf wilting, yellowing and poor Fruit Coloration occur.
 
 
 
Facility greenhouse is a protective production facility for vegetable cultivation in the season when the environment is not suitable for vegetable growth. It can create suitable microclimate conditions for vegetable growth and development. The changes of environmental conditions are complex. Besides the adverse factors such as low temperature, weak light, high humidity, continuous cropping and blind fertilization, there is another phenomenon that can not be ignored, namely, soil salinization and soil acidification.
 
(3) Environmental humidity problem
 
At present, the main symptoms of vegetable seedling death are brown and soft rot at the base of stem and dark green leaves. From the description of symptoms, it can be judged that it is caused by blight. Over-watering has a great deal to do with:
 
First, the root system of hot pepper is underdeveloped, and watering too often after planting results in the root system not sticking, so that the plant growth is weak and disease resistance is reduced.
 
Second, excessive watering caused excessive soil moisture, high temperature and humidity environment created favorable conditions for the reproduction of pathogenic bacteria, coupled with the original plant growth is weak, two favorable conditions are very conducive to the infection of pathogens. Third, the spread of Blight with water, watering accelerated the spread of the disease.
 
We know the cause of the disease, and I recommend that users take the following preventive measures:
 
The first is to control watering and avoid the spread of disease. Proper water control in the early growth stage of pepper can promote root root system to take root and lay a good foundation for the cultivation of strong roots. At the same time, water control combined with paddling hoe can improve the permeability of soil.
 
 
 
Secondly, strengthen ventilation and dehumidification. During the day, the air outlet is widened, the ventilation is strengthened, and the sunshade net is covered to cool down, so as to create environmental conditions that are not conducive to the reproduction of pathogenic bacteria.
 
Thirdly, strengthen the illumination - artificial illumination.
 
Light supplement is particularly important. According to the summary of research and production practice, we generally divide the disaster into three levels.
 
1. Light grade: No sunshine for 3 consecutive days; or 3 consecutive days without sunshine for 4 consecutive cloudy days. At this time, diseases such as cucumber, tomato, pepper and downy mildew began to appear.
 
2. Intermediate: No sunshine for 4-7 days in a row; or sunshine duration < 3 hours for more than 7 days in a row; or 2 times of light oligoirradiation in January, when diseases such as cucumber, tomato, pepper and other common occurrence, but through chemical control measures can still be controlled.
 
3. Severe successive cloudy days (> 8 days); or sunshine hours (< 3 hours) for more than 10 days; or two intermediate oligopolies occurred in January. At this time, 10% to 20% of the diseases were difficult to control, and most of the diseases appeared yield reduction, and continued to develop.
 
Laser plant growth lamp has the function of providing effective light to green plants. The time can be set arbitrarily. It can prolong the effective time of photosynthesis of plants every day, especially in rainy and foggy days, which can make plants grow normally. It can also be used in seedling plants and plant factories.
 
 
 
Laser plant light supplement series products are laser lamps with rare earth materials as light source, which can solve the problems of short sunshine time in winter, fog and haze, rainy and snowy days caused by insufficient external illumination, such as intelligent greenhouse, greenhouse vegetables and fruits growing slowly, low yield, late maturity and so on. Like sunlight, it is conducive to plant growth and plays a great role in increasing crop yield, increment and efficiency.
 
Fourth, the treatment of disease drugs - dipping plate treatment.
 
 
 
Especially some infectious diseases will have better preventive effect. By dipping dish, many roots can be eliminated, and pathogenic problems caused by the matrix can be eliminated. These are very good effects. On the other hand, some harmful fungi in the soil can be blocked and carried out during the whole slow seedling period. Renovation. Nowadays, many products such as dipping plates are probiotics. These types use some fungi to inhibit the growth of harmful bacteria, promote the growth of roots and then prevent diseases. There are also some fungicides of protective type, which basically need to be soaked through, so we should pay attention to the amount of drugs as well. Concentration.
 
Disease prevention and control is mainly prevention, supplemented by drug treatment.

Related tags:

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