How to control the green peel of tomato when the peel is green and the pulp is in the shape of bran heart?

Tomato green peel fruit, also known as tendon rot fruit, symptoms are: tomato peel local browning or green peel, individual tomato is dark brown, hard or necrotic spots, open the diseased fruit, visible flesh is "chaff heart" shape, pulp vascular tissue is dark brown or brown, browned tomato skin is often green or rust color, pulp hardening, poor quality, eat without taste.

Lycopersicon esculentum

1. Causes of disease: tomato green peel disease is a physiological disease, the degree of damage depends on tomato varieties and sunshine time and light intensity and the proportion of nitrogen, phosphorus and potassium in the soil, especially after cloudy days suddenly clear, this disease is easy to occur. In addition, the physical and chemical properties of soil and the decomposition degree of human excrement also affected the occurrence and damage of green peel fruit. Insufficient light, low temperature, high humidity, insufficient carbon dioxide, high night temperature, easy to guide tomato green fruit. The ratio of carbohydrate to nitrogen decreased when nutrient deficiency, partial application of nitrogen fertilizer and insufficient potassium fertilizer, especially excessive ammonia nitrogen, caused abnormal metabolism of tomato, resulting in lignification of vascular bundles and induced green peel fruit. In addition, the soil moisture is too large, the soil permeability is poor, hinders the root system absorption, causes the tomato body nutrient imbalance, the iron absorption reduces, then the disease is heavy.

II. Solutions:

1. Tomato varieties resistant to green peel fruit: At present, the varieties with thin peel and medium fruit and small leaves are more resistant to disease, and the varieties with thick peel are susceptible to disease.

2, increase the application of organic fertilizer: the use of formula fertilization technology, not more ammonium fertilizer, in order to adjust the proportion of nitrogen, phosphorus, potassium in the soil, promote the absorption and utilization of potassium tomato plants.

3. When it suddenly clears up after cloudy days, do not immediately remove the straw curtain. Half should be uncovered first, and then all should be uncovered when the temperature reaches 15℃. This method can prevent green fruits.

4. Regular spraying of potassium dihydrogen phosphate or other foliar fertilizers on tomatoes can reduce green peel fruit.

5. Other measures: increasing the amount of carbon dioxide applied, using a film with good transparency and enhancing light can effectively reduce the green fruit of tomatoes.