Tomato physiology disease clever prevention

Physiological diseases often occur during tomato production, which has a great influence on the yield and quality. The most common are malformed fruit, empty fruit, umbilical rot, cracked fruit, tendon rot, sunburn disease, and poor coloration.

Malformed fruit. Occur mainly in flower bud differentiation and development period, in the low temperature, more fertilizer (especially nitrogen nutrition), water and light is sufficient, easy to form deformed fruit. Spiked fruit is easily formed under malnutrition conditions. In order to prevent the occurrence of malformed fruit, the temperature during nursery should not be too low, and water and nutrition must be adjusted properly.

Empty fruit. The first is that flowering can not be normal fertilization, no fruit in the fruit, the formation of empty fruit. The second is the use of growth hormone, because the concentration is too high, or in the bud treatment, easy to produce empty fruit. Artificial pollination and timely use of hormones in cultivation can avoid the occurrence of empty fruit.

Umbilical rot. Calcium deficiency is a major cause of U.S. rot. There are three reasons for the lack of calcium in fruits: one is the lack of calcium in the soil; the other is high ground temperature, dry soil, high concentration of soil solution, especially potassium, magnesium, and ammonia nitrogen, affecting the absorption of calcium by plants: Calcium works slowly in plants at high temperatures. To prevent umbilical rot disease, lime soil should be used to regulate acidic soils, pay attention to maintaining proper soil concentration, properly control the amount of ammonia nitrogen, avoid excessive soil temperature and drastic changes in soil temperature, and often keep the soil moist in the result period. It is also possible to use 0.5% calcium chloride to spray new leaves and newly emerged inflorescences to prevent umbilical rot.

Cracking fruit. Generally large fruit varieties and mature fruits are prone to cracking fruit, especially in the early stage of fruit hypertrophy, under high temperature, strong light and dry soil conditions, in the event of rainfall or a large number of irrigation, the fruit rapidly expands and produces fruit cracks. To prevent cracking, in addition to the selection of anti-crack fruit varieties, the fruit should be protected from direct sunlight and the soil moisture content should be maintained during the results. Boron fertilizer can also be added to enhance the plasticity of the peel.

Rotten rot. Browning and bleaching types. Both types are diseases induced by a variety of adverse conditions. To prevent tendon rot disease, it is necessary to create suitable conditions for the normal growth of tomato, and appropriate application of potassium fertilizer. The main nitrogen fertilizer is nitrate nitrogen.

Day burn disease. In the summer hot season, due to strong light, the temperature of the shoulder part of the fruit rose, and some tissues burned and died to form sunburn disease. Smaller leaf areas, fruit exposed or thin skin varieties susceptible to disease. In order to prevent sunburn, the sunburn of the fruit should be avoided in the result period. It is best to use a conical frame or a frog. When the tinea corporis are in the shade, put the ear in the shade of the frame and add potassium fertilizer appropriately.

Bad coloring. After the fruit is sufficiently enlarged, the coloration of the fruit is not only related to the temperature, but also closely related to the supply of nutrients. In the absence of nitrogen, potassium and boron, the fruit is poorly colored. The fruit is inflated during the peak period, and the fruit lacks moisture, which can also cause poor coloration. Therefore, it is necessary to control temperature and moisture in production and pay attention to balanced nutrition.

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