Tomato rot disease, also known as rot or rot, has occurred in the local area in recent years. If it is not prevented in time, it will bring greater economic losses to vegetable farmers. It mainly harms the fruit.
First, the symptoms: There are two common types: one is browning. Local browning occurred in the fruit surface of fruit hypertrophy, the surface of the fruit surface was uneven, and the fruit was brown or necrotic. The vascular bundle in the peel showed brownish stripe necrosis, the heart hardened or the flesh browned. Lose the value of the goods. The second is a white variant. It mainly occurs in the red ripening period of green ripe fruit. The disease is uneven coloring of the fruit, and the waxy luster of the diseased part. The fruit of the diseased fruit is “heart-shapedâ€, and the vascular bundle of the pulp is dark brown and the disease is light. The brown part is not red, the flesh is hardened, the quality is poor, and it is light and tasteless. The heavy vascular vascular bundles are all dark brown and the fruit forms a cavity. The disease is generally not easy to see symptoms from the performance of stems and leaves.
Second, the cause: the disease is a physiological disease. The degree of disease is related to the variety and duration of light and intensity, the ratio of nitrogen, phosphorus and potassium in the soil, and also to the soil condition and the degree of manure and rot. In production, if the light is weak, the production time is long, the proportion of nitrogen and potassium in the soil is out of balance, and the partial application of nitrogen fertilizer causes potassium deficiency, especially the excessive ammonium nitrogen is easy to induce tendon rot. The soil moisture content is too high, the soil permeability is not good, and the application of unfertilized human excrement is severe.
Third, the prevention and treatment methods: 1, the selection of disease-resistant varieties. 2. Scientifically determine the sowing and planting period. Pay attention to reasonable rotation to alleviate the imbalance of soil nutrients. 3, increase the application of fully decomposed organic fertilizer, especially bio-organic fertilizer, to achieve balanced fertilization, it is strictly prohibited to apply ammonium fertilizer. After the fruit setting, the multi-component micro-fertilizer (boron, calcium, iron) was applied once every 15 days for 2 to 3 times. Keep the soil moisture suitable and drain it in time after rain. 4. Improve management level. Properly planting, increasing the inter-row transmittance, enhancing inter-row ventilation and improving lighting conditions. Spray potassium dihydrogen phosphate when the temperature is low and the light is weak. Advocate the application of multi-component compound fertilizer, as well as other foliar fertilizers such as love more than once, every 7 days, for 3 - 4 times in a row.
First, the symptoms: There are two common types: one is browning. Local browning occurred in the fruit surface of fruit hypertrophy, the surface of the fruit surface was uneven, and the fruit was brown or necrotic. The vascular bundle in the peel showed brownish stripe necrosis, the heart hardened or the flesh browned. Lose the value of the goods. The second is a white variant. It mainly occurs in the red ripening period of green ripe fruit. The disease is uneven coloring of the fruit, and the waxy luster of the diseased part. The fruit of the diseased fruit is “heart-shapedâ€, and the vascular bundle of the pulp is dark brown and the disease is light. The brown part is not red, the flesh is hardened, the quality is poor, and it is light and tasteless. The heavy vascular vascular bundles are all dark brown and the fruit forms a cavity. The disease is generally not easy to see symptoms from the performance of stems and leaves.
Second, the cause: the disease is a physiological disease. The degree of disease is related to the variety and duration of light and intensity, the ratio of nitrogen, phosphorus and potassium in the soil, and also to the soil condition and the degree of manure and rot. In production, if the light is weak, the production time is long, the proportion of nitrogen and potassium in the soil is out of balance, and the partial application of nitrogen fertilizer causes potassium deficiency, especially the excessive ammonium nitrogen is easy to induce tendon rot. The soil moisture content is too high, the soil permeability is not good, and the application of unfertilized human excrement is severe.
Third, the prevention and treatment methods: 1, the selection of disease-resistant varieties. 2. Scientifically determine the sowing and planting period. Pay attention to reasonable rotation to alleviate the imbalance of soil nutrients. 3, increase the application of fully decomposed organic fertilizer, especially bio-organic fertilizer, to achieve balanced fertilization, it is strictly prohibited to apply ammonium fertilizer. After the fruit setting, the multi-component micro-fertilizer (boron, calcium, iron) was applied once every 15 days for 2 to 3 times. Keep the soil moisture suitable and drain it in time after rain. 4. Improve management level. Properly planting, increasing the inter-row transmittance, enhancing inter-row ventilation and improving lighting conditions. Spray potassium dihydrogen phosphate when the temperature is low and the light is weak. Advocate the application of multi-component compound fertilizer, as well as other foliar fertilizers such as love more than once, every 7 days, for 3 - 4 times in a row.
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