In recent years, many vegetable farmers have tried to make vegetables grow stronger and less sick, and a large number of pesticides have been applied to the prevention and control of vegetables. This has not only increased production costs, but also threatened the quality and safety of vegetables. Several methods for reducing the use of vegetable pesticides are proposed for your reference.
First, the selection of resistant varieties
The selection of disease-resistant varieties is the basis for reducing the incidence of vegetables, but it is necessary to select high-yield, high-yield, disease-resistant and stress-resistant varieties that are suitable for local production.
Second, strengthen cultivation management
1. Reasonable rotation. Such as the solanaceous vegetables and onion and garlic vegetables, not only can significantly reduce the disease, but also have the effect of increasing production.
2. Remove the residue of the diseased plant. It is a good method to prevent pests and diseases by removing the residuals, diseased fruits and weeds of the diseased plants, destroying the deep burial and cutting off the transmission routes.
3. Reduce the humidity. Because the bacteria can multiply in large humidity and harm the vegetables, the humidity in the field should be reduced as much as possible to reduce the occurrence of diseases.
4. Rational fertilization. It is best to use formula fertilizer on vegetables, and mainly to increase the application of decomposed organic fertilizer, combined with the application of phosphate fertilizer, control the application rate of nitrogen fertilizer, and use the nitrate inhibitor dicyandiamide in the later stage of growth to prevent nitric acid in vegetables. Salt accumulation and pollution.
5. Use soilless cultivation. In this way, it is a good way to artificially reduce the source of the bacteria.
6. Set up the insect net. If it is a greenhouse vegetable, an insect net is installed in the vent of the shed to prevent the invasion of pests such as whitefly and mites, and reduce the chance of infection.
Third, ecological control
1. Adopt "five changes and one increase". That is to say, "there is a drip film for no drip film", and the "opening in the shed is the full cover of the mulch in the shed", and the "flat cultivating for high ridge cultivation" is changed, and the "clear water irrigation is used for under-film immersion". “The wind in the middle of the greenhouse is to ventilate the ridges at high placesâ€; the gully water in the front of the shed is added, and the shed film water is removed from the ditch to infiltrate into the ground to reduce the evaporation of water in the shed.
2. Master the "three pouring three not pouring three control" irrigation technology. That is, the cloudy days are not poured in sunny days, the afternoon is not poured in the morning, the clear water is not poured in the dark water; the seedling period controls the watering, even the cloudy day controls the watering, and the low temperature controls the watering.
3. Strengthen lighting and temperature management. The shed film is often wiped to maintain the good transparency of the shed film, increase the light, increase the temperature, and reduce the relative humidity; and effectively reduce the freezing damage and physiological diseases of vegetables by thickening the wall, covering the double membrane, and digging the cold ditch.
First, the selection of resistant varieties
The selection of disease-resistant varieties is the basis for reducing the incidence of vegetables, but it is necessary to select high-yield, high-yield, disease-resistant and stress-resistant varieties that are suitable for local production.
Second, strengthen cultivation management
1. Reasonable rotation. Such as the solanaceous vegetables and onion and garlic vegetables, not only can significantly reduce the disease, but also have the effect of increasing production.
2. Remove the residue of the diseased plant. It is a good method to prevent pests and diseases by removing the residuals, diseased fruits and weeds of the diseased plants, destroying the deep burial and cutting off the transmission routes.
3. Reduce the humidity. Because the bacteria can multiply in large humidity and harm the vegetables, the humidity in the field should be reduced as much as possible to reduce the occurrence of diseases.
4. Rational fertilization. It is best to use formula fertilizer on vegetables, and mainly to increase the application of decomposed organic fertilizer, combined with the application of phosphate fertilizer, control the application rate of nitrogen fertilizer, and use the nitrate inhibitor dicyandiamide in the later stage of growth to prevent nitric acid in vegetables. Salt accumulation and pollution.
5. Use soilless cultivation. In this way, it is a good way to artificially reduce the source of the bacteria.
6. Set up the insect net. If it is a greenhouse vegetable, an insect net is installed in the vent of the shed to prevent the invasion of pests such as whitefly and mites, and reduce the chance of infection.
Third, ecological control
1. Adopt "five changes and one increase". That is to say, "there is a drip film for no drip film", and the "opening in the shed is the full cover of the mulch in the shed", and the "flat cultivating for high ridge cultivation" is changed, and the "clear water irrigation is used for under-film immersion". “The wind in the middle of the greenhouse is to ventilate the ridges at high placesâ€; the gully water in the front of the shed is added, and the shed film water is removed from the ditch to infiltrate into the ground to reduce the evaporation of water in the shed.
2. Master the "three pouring three not pouring three control" irrigation technology. That is, the cloudy days are not poured in sunny days, the afternoon is not poured in the morning, the clear water is not poured in the dark water; the seedling period controls the watering, even the cloudy day controls the watering, and the low temperature controls the watering.
3. Strengthen lighting and temperature management. The shed film is often wiped to maintain the good transparency of the shed film, increase the light, increase the temperature, and reduce the relative humidity; and effectively reduce the freezing damage and physiological diseases of vegetables by thickening the wall, covering the double membrane, and digging the cold ditch.
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