Malformed fruit is one of the main physiological diseases in greenhouse tomato cultivation. It directly affects the yield and quality of commodities and determines the economic benefits of vegetable farmers. Therefore, it is necessary to clarify the cause of the formation of tomato malformation, and take some preventive measures to reduce the formation of tomato malformation. Next, Huinong.com will introduce the causes and prevention measures of tomato malformation. First, the type of tomato malformation (1) Deformed fruit: This kind of fruit is more common in the early stage tomato production in greenhouse. Its appearance characteristics: the structure of tomato fruit does not change much, but the shape is incomplete, some are oval, and some are peach. (2) Umbilical fruit: This fruit is most common in early fruit of early-maturing tomato in greenhouse. Its appearance features: the peel of the umbilical part of the tomato fruit is split, and the placenta tissue and seeds are turned outward or exposed. (3) Tumor-like fruit: This fruit is rare. Its appearance is characterized by a knob-like shape at the end of the fruit near the bract, and its shape. Second, the cause of tomato malformation 1, flower bud differentiation and development encountered continuous 5 ~ 6 ° C or 3 ~ 4 ° C low night temperature, easy to lead to deformed fruit, winter and spring 茬 tomatoes 1 ~ 2 spikes easily deformed more than this cause. 2, the seedling age is elongated, when the low temperature or drought time lasts for a long time, so that the seedlings are under the condition of inhibiting growth for a long time, the flower is easy to form a cork, and then transferred to the appropriate conditions, the corked tissue can not adapt to the normal tissue The rapid growth of the fruit forms a cracked fruit, which is expressed as a seed or fruit. 3, partial application of nitrogen fertilizer, excessive nitrogen fertilizer caused tomato flower buds to over-differentiate, the number of ventricles increased, eventually leading to the formation of multi-ventricular malformation fruit; due to insufficient calcium, it is easy to form longitudinal and lateral formation and cracking and umbilical fruit. 4, caused by improper use of hormones, in order to prevent tomatoes from falling and falling, often use 2,4-D or tomato coffin, but the concentration is not accurate, repeating scented flowers, high temperature during flowering, soil drought, etc. are prone to tomato malformation If the flowers are not developed, the flowers are also prone to empty fruits. In addition, when the seedlings occur in a long time, the concentration of the plant growth regulator is large or the number of times, so that the seedlings can be controlled, and when the flowers are smashed, the deformed fruit is easily caused. 5, high temperature and low humidity, insufficient light, pollen abortion, poor fertilization, etc. to form a hollow fruit. 6. The malformed fruit caused by viral disease is the most harmful one. The virus is divided into several types, such as mosaic virus and stripe virus. These viruses will not only seriously affect the flowering and fruit setting of tomatoes, but also the fruits that have grown up. It becomes a flower fruit, a green fruit and a tumor, or a fruit surface is uneven, and the value of the product is lost. Third, tomato malformation control methods: 1. Select varieties that are not easy to produce deformed fruit, generally resistant to low temperature and low light intensity, and are not easy to appear deformed fruit; 2. Strengthen the temperature and light regulation and fertilizer and water management during the seedling stage, especially in the flower bud differentiation stage, especially the first inflorescence differentiation stage of tomato, that is, 25-30 days after germination, 2-3 true leaves, to prevent The temperature is too low, the general night temperature is controlled at 12-16 ° C, and the daytime temperature is 25-28 ° C to facilitate flower bud differentiation and growth; 3. Avoid partial application, excessive application of nitrogen fertilizer, appropriate application of phosphorus and potassium fertilizer, to meet the flower bud differentiation and nutrients required for normal growth and development of flower organs, to prevent differentiation of multi-cardiac skin to form deformed fruit, or to form a band-shaped flat flower and develop into Malformed fruit 4. The abnormality caused by viral diseases is preventive. Virus disease is extremely harmful and cannot be cured. Tomato virus disease is mainly transmitted by sucking pests. The key to preventing viral diseases in greenhouses is to control sucking pests such as aphids, spider mites and whiteflies to prevent transmission. 5. Pay attention to the 2,4-D and anti-fallin of hormonal hormones. When using, the concentration should be adjusted according to the changes of the environment. The high concentration is often the main cause of fruit malformation. The change is high, the temperature is high, the concentration is low, and the temperature is low. 6. Spray foliar fertilizer at the right time, or compound fertilizer containing boron and calcium. When the tomato is found to be deformed, it should be removed in time to facilitate the growth and development of normal fruits. Disposable Latex Gloves,Disposable Vinyl Gloves,Nitrile Glove,Latex Glove ZHANGJIAGANG DINSHENGLIN TRADING CO.,LTD , https://www.dslhouse.com
