How to prevent and treat tomato physiological diseases? What to do with tomato deformed fruits?

Here I will tell you how to prevent and treat physiological diseases of tomatoes:

1. Deformed Fruit

There are three types. One is the deformed fruit. The structure of this deformed fruit has not changed much, but the shape is not round. Some are oval fruits, that is, due to the increase in carpels, their cross-section is oval; some become pointed fruits, that is, peach-shaped fruits. The number of carpels in the fruit is normal, but the navel is particularly protruding like a peach. The second is the tubercle fruit. There is a tubercle-like protrusion near the end of the sepals of the fruit, shaped like a nose, so it is called a nose-shaped tubercle. The third is the navel-cracked fruit. The peel at the navel part of the fruit cracks, so that the placenta tissue and seeds sometimes roll outward and expose. This navel-cracked fruit is often caused by the cracking of the pistil of the deformed flower. The formation of deformed fruits begins when the flower buds differentiate. When the flower buds differentiate, the temperature is low, the water, fertilizer, and light are insufficient, and the nutrition is malnourished, the flower buds are poorly differentiated, and deformed fruits such as pointed fruits with fewer ventricles are easily formed. If there is too much water and fertilizer, sufficient light, and vigorous stems and leaves during the flower bud differentiation period, and the temperature is low, the flower bud differentiation nutrients are excessive and the flower bud cells divide too vigorously, which is easy to form multi-carpel oval fruits or tumor-shaped fruits. In addition, if the concentration of growth stimulants is too high, it is easy to form pointed fruits; too dry or too wet soil affects the development of flower buds and is also easy to form deformed fruits.

Preventing the production of deformed fruits must start from the seedling stage. During the seedling stage, pay attention to the control of environmental conditions such as temperature, light, water, and fertilizer, create conditions that are conducive to flower bud differentiation, and use growth stimulants appropriately to avoid or reduce the occurrence of deformed fruits.

2. Grain-shaped fruit

The fruit develops very slowly after it sets, and after maturity, it is as small as a cherry seed, which is called grain-shaped fruit or dead fruit. Grain-shaped fruit phenomenon occurs more frequently in tomato overwintering and early-maturing cultivation. The cause of its occurrence is poor pollination during the flowering period, low night temperature, insufficient light, and too little nutrient accumulation. After being treated with growth stimulants, the formation of abscission layer at the fruit stalk is inhibited. After the fruit sets, the photosynthetic product supply is too small to expand. Measures to prevent the occurrence of grain-shaped fruit are to spray one ten-thousandth of the natural brassica sucrassin-Shuofeng 481, improve environmental conditions such as temperature and light during the flowering period, enhance photosynthesis, and improve the nutrient supply of the fruit.

3. Stains and Brown Heart

Spots are yellow or green patches in the fruit peel tissue. The appearance of spotted fruits is related to the growth density of seeds. When there are fewer seeds in the ventricle, the activity of hormones is reduced, and the soluble solids content in the juice is low, spots are more likely to appear. Measures to prevent the occurrence of spots are to strengthen fertilizer and water management and spray natural brassica oleracea-Shuofeng 481 at 1/10,000 liquid. Brown heart: The vascular bundle of the fruit turns brown, or the interior of the fruit turns gray-brown. Brown heart is generally caused by viruses, and there is also a physiological brown heart phenomenon. It is easy to occur under conditions of weak light, humid air and lack of potassium fertilizer. Measures to prevent brown heart are: pay attention to virus prevention and control, improve light conditions, properly ventilate and dehumidify, and increase potassium fertilizer. During the growth period, 0.2% liquid of high-energy red potassium can be sprayed on the roots 3-4 times.