Management techniques of fruiting period of Tomato in greenhouse

1. Prevent viral disease. The vents are equipped with anti-insect nets, yellow boards are hung in the shed to control whitefly, and the leaves are sprayed with Albit and pyrimidinomycin or Ningnanmycin plus zinc fertilizer.

2. Fertilizer and water management. Fertilization and watering of the first ear should be controlled as far as possible before sitting, mainly in order to promote roots and cultivate strong trees, the first ear should be fertilized when the eggs are big, and then topdressing should be applied in time when each ear is enlarged, and the most potassium and calcium are needed in the fruiting period, topdressing high potassium compound fertilizer twice and calcium nitrate once. Chemical fertilizers use fully nutritious water-soluble fertilizers, such as Norwegian Yaran Kangjing, combined with chitin fertilizer shell power or Taiwan Weidan nutrient solution.

3. Prevent fruit cracking and navel rot. Regular foliar spraying of calcium and boron fertilizer to prevent fruit cracking and navel rot.

4. Protect flowers and fruits: spray Albit on the leaves before flowering, the flowers bloom neatly and the flowers are large. Tomato Ling, Guoling or Anti-falling element are generally used to touch flowers, and the concentration is required to be 20-25ppm in winter and 15-20ppm in summer. The concentration should be adjusted in time according to the temperature, too high will affect the fruit growth. In order to prevent the fruit from setting at a low temperature in winter, the empty ear of three or four ears can be dipped in the anther to increase the fruit setting rate, and a bag can be added to 4 jin of anther. It is recommended to use bumblebee pollination, high fruit setting rate, good fruit shape and good taste.