Flowering and Fruit setting is related to yield formation of Tomato Flower and Fruit Promotion and Control techniques

Tomato enters the fruiting stage, that is, from the first inflorescence fruit setting to the end of tomato harvest, tomato plants change from stem and leaf growth and flowering to fruit setting at the same time, which is the key period for the formation of tomato yield.

Tomato shredding

1. Thinning and fixing fruit: the main work in this period is to determine the number of ears according to the density of tomato plants and the size of tomatoes according to the number of ears. There are 8-10 ears per plant and 3-4 tomatoes with normal fruit shape, uniform size and no diseases and insect pests per ear, which is helpful to promote the growth of tomato. If there are too many fruits, it will often cause different sizes of tomatoes, reduce the weight of single fruit and reduce the quality.

After setting fruit, the growth speed of tomato should be accelerated, so it is necessary to release air and moisture in time, adjust the temperature and humidity in the shed, strengthen the management of water and fertilizer, do a good job in pest control, promote tomato ripening, and improve yield and quality.

2. Watering and fertilization: first of all, master the temperature and irrigate the first water in time. When the first fruit grows to walnut, the second fruit broad bean, and the third fruit bud begins to bloom, end squatting seedlings and start irrigation, once every 10-15 days, combined with topdressing urea, 15-20 kg per mu each time.

After the first ear fruit enters the coloring period, with the extension of light time and the enhancement of light intensity, in order to prevent excessive temperature in the shed from affecting tomato coloring and strong light burning fruit, it is necessary to gradually increase ventilation so that the air temperature in the shed is controlled at 20-25 ℃ during the day, 13-17 ℃ at night, and the air relative humidity is 45% and 50%. In order to prevent strong light burning fruit and cloudy and rainy days after suddenly turning eyes, due to strong light irradiation, leaf transpiration is too large, resulting in wilting seedlings, flowers and fruit loss phenomenon, it is best to cover the sunshade net around noon.

3. Leafing: when the tomato first sequence fruit grows to be big enough and no longer grows, it turns to white-green. At this time, all the leaves in the lower part of the fruit sequence can be knocked out, so as to reduce nutrient consumption, prevent disease and decay, increase ventilation and light transmission, and promote the tomato to change color and mature as soon as possible.

4. Disease control: in recent years, with the development of tomato cultivation area, the types of diseases increased and the damage degree increased, which has become an important factor hindering the development of tomato. The main diseases are early blight, leaf mold and so on. At present, while other measures are taken, chemical control is still the main measure. Sulfur can be used to fumigate in the shed during the growing period. Prevent early blight and so on.

Leaf mildew is a common and serious disease of tomato in greenhouse, which often causes early withering of leaves and early pulling of seedlings. Once the disease occurs, the drug can be sprayed with 80% mancozeb wettable powder 400-500 times or 50% carbendazim wettable powder 500 times as early as possible.

At low temperature, the tomato will ripen 45-50 days after flowering; if the temperature is high, it will mature about 40 days after flowering. The ripening process of tomato can be divided into four stages: green ripening stage, discoloration stage, firm ripening stage and full ripening stage. If harvested in the green maturity, the tomato is hard and suitable for storage and transportation, but the sugar content is low and the flavor is poor. General harvest standard: the top of the tomato begins to turn red slightly, that is, it is harvested during the discoloration period. On the one hand, it is beneficial to storage and transportation, on the other hand, it is also beneficial to the development of tomato in the later stage. Reasonable fertilization and watering, timely regulation of temperature and humidity, correct spraying of chemical hormones, timely shaping and leafing are important technical measures in the flowering and fruiting period of tomato. As long as we master the utilization of nutrients and the reasonable regulation between ears, we can achieve the goal of high yield and high efficiency of tomato.