Two common physiological diseases of celery
2018-05-02 20:01:09
A hollow symptoms: Celery Hollow is a phenomenon of aging organization, starting from the hollow petioles and gradually move upwards, hollow parts appear white flocculent corky tissue.
Cause of the disease: The celery hollow often occurs in the soil where the soil is thin, especially in the middle and late period when it encounters high temperature and drought, lack of fertilizers, pests and diseases, excessive fat burning, lack of boron, frozen celery, and late harvest. The ability of the root system to absorb fertilizer and water is reduced, and the ground does not receive sufficient nutrition. The physiological function of the leaves is reduced, and the nutrients produced are insufficient. In this case, the parenchyma of the petiole close to the pith first ruptures and atrophies, forming a hollow stalk.
Control methods: (a) Select solid celery varieties. (b) Choose suitable plots for planting. It is appropriate to use sandy loam rich in organic matter, water retention and fertility, and good irrigation and drainage conditions. The pH of the soil should be neutral or slightly acidic, and avoid planting on clay or sandy soil. (C) temperature control. Hi celery cold and humid environmental conditions, celery shed indoor cultivation, daytime temperatures preferably at 15 ℃ ~ 20 ℃, not exceeding 25 ℃, maintained at night about 10 ℃, not less than 5 ℃. Usually appropriate ventilation, reduce air humidity. (d) a reasonable fertilizer. Apply enough base fertilizer to spread evenly and apply about 5,000 kilograms of organic manure per acre. It is best to add 100 to 200 kg of fermented chicken manure or about 15 kg of diammonium phosphate. Planting seedlings after easing the seedlings, applying about 10 kilograms of ammonium sulfate per acre with water, or fermenting human excrement. During the growing season, the top dressing is mainly available nitrogen fertilizer. In combination with potash fertilizer, each time about 20 kg is applied and fertilizer is applied once every 15 days. To prevent the lack of boron hollow, 0.3% ~ 0.5% borax solution can be applied to foliar fertilizer. Water pouring. We often keep the earth moist. In addition, we must pay attention to the timely prevention of pests and timely harvest.
Second, the petiole cracking symptoms: the main manifestation of the stem base together with the petiole split at the same time.
Causes of morbidity: First, it is caused by the lack of boron; second, it is caused by growth retardation under low temperature and drought conditions. In addition, sudden high temperatures, high humidity, excessive water absorption of the plants, resulting in rapid filling of water, can also cause cracking.
Control methods: First, apply adequately decomposed organic fertilizer, apply 1 kg of borax per acre, and fully mix with organic fertilizer; second, foliar spray 0.1% ~ 0.3% borax aqueous solution, in addition, management pay attention to uniform watering .
Cause of the disease: The celery hollow often occurs in the soil where the soil is thin, especially in the middle and late period when it encounters high temperature and drought, lack of fertilizers, pests and diseases, excessive fat burning, lack of boron, frozen celery, and late harvest. The ability of the root system to absorb fertilizer and water is reduced, and the ground does not receive sufficient nutrition. The physiological function of the leaves is reduced, and the nutrients produced are insufficient. In this case, the parenchyma of the petiole close to the pith first ruptures and atrophies, forming a hollow stalk.
Control methods: (a) Select solid celery varieties. (b) Choose suitable plots for planting. It is appropriate to use sandy loam rich in organic matter, water retention and fertility, and good irrigation and drainage conditions. The pH of the soil should be neutral or slightly acidic, and avoid planting on clay or sandy soil. (C) temperature control. Hi celery cold and humid environmental conditions, celery shed indoor cultivation, daytime temperatures preferably at 15 ℃ ~ 20 ℃, not exceeding 25 ℃, maintained at night about 10 ℃, not less than 5 ℃. Usually appropriate ventilation, reduce air humidity. (d) a reasonable fertilizer. Apply enough base fertilizer to spread evenly and apply about 5,000 kilograms of organic manure per acre. It is best to add 100 to 200 kg of fermented chicken manure or about 15 kg of diammonium phosphate. Planting seedlings after easing the seedlings, applying about 10 kilograms of ammonium sulfate per acre with water, or fermenting human excrement. During the growing season, the top dressing is mainly available nitrogen fertilizer. In combination with potash fertilizer, each time about 20 kg is applied and fertilizer is applied once every 15 days. To prevent the lack of boron hollow, 0.3% ~ 0.5% borax solution can be applied to foliar fertilizer. Water pouring. We often keep the earth moist. In addition, we must pay attention to the timely prevention of pests and timely harvest.
Second, the petiole cracking symptoms: the main manifestation of the stem base together with the petiole split at the same time.
Causes of morbidity: First, it is caused by the lack of boron; second, it is caused by growth retardation under low temperature and drought conditions. In addition, sudden high temperatures, high humidity, excessive water absorption of the plants, resulting in rapid filling of water, can also cause cracking.
Control methods: First, apply adequately decomposed organic fertilizer, apply 1 kg of borax per acre, and fully mix with organic fertilizer; second, foliar spray 0.1% ~ 0.3% borax aqueous solution, in addition, management pay attention to uniform watering .