What to do with a tomato "face"
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A: Tomato blossoms are fruits, which are the red spots on the red fruits of the vegetable growers. There are yellow and red spots, yellow and green spots, and green and brown spots on the surface. Brown bars.
In the severe winter, large patches of yellow spots on tomatoes are mainly caused by root rot, blight and physiological dead plants. The late mature fruits have insufficient nutrition during the reddening process, and the amount of lycopene is low. Caused. Prevention and control of this flower face should start from the prevention of root rot, blight and physiological death. In the summer, the temperature can be high and stuffy shed, dumping hoe, pouring medicine to prevent wilt and root rot. Physiological dead seedlings are mainly caused by long continuous cropping, too early seedling cultivation, excessive application of chemical fertilizers, excessive grounding, and poor root development. They should try to dump pods, grow seedlings in proper time, apply appropriate fertilizers, try to deepen the ground, or use No deep plowing 200 g/mu is sprayed on the surface to promote deep and loose soil and promote root development. As long as the phenomenon of dead plants is reduced, the number of flower face fruits that have not yet matured is reduced.
There are yellow, green, yellow and red spots on the fruit, mainly due to viral diseases. The virus disease mainly occurred in the high temperature from October to November. After entering the low temperature and indoor humidity, the virus disease basically did not occur again in January. Infected plants showed no obvious symptoms and most of the severe symptoms had been removed. So although this kind of flower face is fruitful, it is not much. Since viral diseases can only be prevented and cannot be eradicated, most of the agents used to treat viral diseases at this time have no effect, and plant growth regulators can be used as natural growth hormones, which can promote growth and development. Viral disease hazards.
The brown stripe on the surface of the fruit and the brown ribs in the fruit are caused by the stripe virus. Most of them are caused by too weak light in the greenhouse, high humidity, low temperature, and lack of potassium. Prevention and control measures are to improve light, ventilation and reduce humidity, increase room temperature, and should be supplemented with potassium. The lack of potassium at this time is not the lack of potassium in the soil, but a physiological deficiency of potassium. Because of the low temperature, a large amount of ammonium ions accumulated in the soil, inhibiting the absorption of potassium by the root system. Although there is a large amount of potassium in the soil, the plants still show a lack of potassium, resulting in poor nutrient transport, and the fruit is necrotic and brown due to lack of nutrition. . Using the method of applying fertilizers outside the roots, 0.3% of high-energy red potassium and other potassium foliar fertilizers were directly sprayed on the leaves.