Causes of physiological disorders in tomato in summer
In summer, due to strong sunshine, high temperatures, heavy rainfall, improper selection of varieties, or extensive management, it is very easy to cause fruit deformities in the fruiting period of tomato, and various physiological disorders such as fruit empty holes and stagnant fruits and umbilical fissures may affect tomatoes. Results Quality and economic benefits per unit area. Here are some of the common causes and prevention measures are described as follows: 1. Malformed fruit and stagnation fruit deformity in the shape of fruit deformity, tumor-like fruit and the Umbilical Cracking 3 kinds. The reason is that flower buds differentiate under low temperature conditions, resulting in the development of a number of carpel ovary development of fruit, or due to plant nutrient growth, resulting in slow growth of some vegetative organs. Prevention measures include maintaining the temperature between 18-24°C during flower bud differentiation, and strengthening field management to coordinate the relationship between vegetative growth and reproductive growth and promote fruit development. The formation of stagnant fruit is mostly due to the poor development of flower bud differentiation within the placenta tissue, a small fruit formed by normal development, hard, astringent and inferior fruit. Prevent methods, create a favorable environment, and promote fruit development. 2. Cracked fruit and daily wounds The skin is thin, and the water content in the pulp is high. Under the erosion of the hot sun and heavy rain, the fruit cracks and causes the bacteria to invade the interior, resulting in rot. There are two types of cracking in the shape of a ring crack and a radial crack. The main cause of this is the low soil moisture in the early stage of fruit growth, the slow fruit growth, the appropriate soil conditions in the later period, the rapid growth of internal tissues, and the inadvertent internal and external tissues that cause cracking. Thick skin varieties can be used, and organic fertilizers can be added at the same time to maintain even water supply during fruit growth. The day-to-day injury is caused by the high temperature of the skin and the burn caused by the strong direct sunlight. Generally, fertilizer and water management should be strengthened to increase the luxuriant foliage or cover the sunshade equipment in the light conditions to reduce direct sunlight. 3. The fruit of the empty fruit is not sufficiently full, the peel and the pulp are separated, and the seed cavity is empty. The reasons for this are mostly due to poor fertilization and excessive use of nitrogen fertilizer in management, or improper use of hormones, or sun and temperature discomfort. Reasonable methods can be used to strengthen the management of light and heat in the field of water, fertilizer and gas, and to rationally apply hormones and assist in pollen receiving. 4. Poorly-colored tomatoes The poor coloration of tomato showed green, yellow patches and internal blackening and browning in the peel tissue. According to the formation site is divided into green shoulders, stains and physiological brown heart. Causes: Due to improper use of the variety, the fruit was exposed to high temperature and strong light and fruits or a few germs during fruiting. The prevention method is to use resistant varieties, strengthen fertilizer and water management, increase organic fertilizers, promote the growth of branches and leaves, avoid exposure of fruits to strong light conditions, and promptly implement pest control and disease infestation. 5. The navel of the umbilical rot turns black and brown, and then rots. The umbilical rot is different from the umbilical fissure, and its degree of damage is more severe than the umbilical fissure The reason for this is a lack of available calcium salts in the soil and a lack of soil moisture, or a physiological obstacle caused by the infestation of certain diseases. Among the prevention methods, organic fertilizers and chemical fertilizers are mainly used to increase the water retention and fertilizer retention capacity of the soil, enhance the use of calcium salts, and strengthen field management to suppress or reduce the occurrence of certain diseases.