The prevention and treatment of tomato drop and fruit drop

Falling and falling of tomato is a common problem in tomato cultivation in open field and protected areas. After growth and development have entered the fruiting period, they often occur to varying degrees, which brings disadvantages to the improvement of tomato yield and quality. Why do tomatoes fall and fall, how to prevent it?

The main reasons for falling tomatoes are temperature, light and moisture.

1, the temperature

The optimum temperature for the flowering period of tomato is 25-28°C. When the flowering night temperature is lower than 15°C, the flower buds are not well developed and pollen tubes do not grow or extend slowly. They cannot pollinate normally and fall. When the daytime temperature exceeds 35°C, the physiological growth is disturbed and destroyed, and normal pollination cannot result in flowering.

2, light

Insufficient light, decreased photosynthesis, and insufficient carbohydrate supply can easily lead to plant growth. Due to malnutrition, flower growth is caused by abnormal flower development.

3, moisture

The soil moisture is too large. The seedlings are susceptible to malnutrition and falling, and the air humidity is too high, especially the high temperature and high humidity affect the pollination of tomatoes and cause flowering. The soil is too dry or lacks fertility, the plants are weak, and the secretion of hormones is reduced. It is also easy to form a layer of fallen flowers.

Preventive measures: To prevent tomatoes from falling and fruiting and falling down, timely do a good job on the basis of timely sowing, strong seedling cultivation, rational close planting, scientific fertilization, and strengthening the plant's resistance to stress.

1, to improve the temperature and humidity conditions of tomato fruit and fruit. Anti-low temperature in spring, anti-high temperature or drought in summer and autumn, timely irrigation and drainage, keep the ground dry, high temperature when the spray mist spray to protect the flowers and protect the fruit.

2. To ensure nutrient supply during tomato flowering and fruiting period. Fertilizer in the middle and after the application of the foliar spray fertilizer is good, such as spraying fruit 0.2-0.3% of potassium dihydrogen phosphate. For those who have obvious signs of premature fertility due to lack of fertilizers, it is necessary to make timely use of quick-acting fertilizers.

3. Use plant growth regulators to regulate hormone balance in tomato plants to achieve the purpose of flower protection and fruit protection. One must master the accurate use concentration. When the temperature is lower, the use concentration can be higher. When the temperature is higher, the use concentration should be lower. Second, we must master the correct use of methods: In the sunny morning 8-10 hours, use a brush to draw a small amount of liquid, in the newly opened female flower pedicle, click or lightly spread on the pedicel, careful not to splatter leaves and tender Tips to prevent injury caused by drugs. In addition, do not use metal containers for medicine.

4. Pest control: Diseases that damage tomatoes and fruits mainly include early blight, gray mold, ulcer disease and streak virus disease.

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