How to manage tomato high yield in rainy weather in summer?

Tomatoes are planted in summer, because the climatic conditions can meet the needs of their growth and development, and they grow fast and bear more fruits. But in rainy weather, branches and leaves will grow in vain and the disease will get worse. Therefore, it is necessary to strengthen management in order to obtain a better harvest.

1, scaffolding tied vines:

The branches and vines of tomatoes are soft, so it is necessary to tie vines for them and create better space for their growth and development. The first ear fruit after survival should be set up in time before flowering. Trees with the length of 1.6 ~ 1.8m can be fixed in the border 8 ~ 10 cm away from tomato seedlings, and one stem of each plant is connected in parallel to form a herringbone frame. 1 When the inflorescence blooms, tie vines, and use cloth or plastic rope to Dozza several times to ensure that the inflorescence of tomato faces outwards, which is beneficial to dipping flowers and keeping fruit.

2, pruning:

Most tomato varieties have infinite growth habits, and they will grow indefinitely as long as they don't top, and they have strong branching ability. Especially in rainy weather, there are many ineffective branches, which will consume a lot of nutrients, leading to lush foliage in the field and high shading humidity, which will easily lead to aggravation of diseases. So it needs to be trimmed in time. There are usually four pruning methods for tomatoes, and the specific method to choose depends on the planting varieties and soil fertility.

(1) single stem pruning method: when pruning with a single stem, only one trunk is left for each plant, and all lateral branches are removed one after another, leaving a certain number of fruit ears for trunk grafting. Generally, 5~ 14 ear is reserved in production.

(2) Double stem pruning method: on the basis of single stem pruning, except the trunk, 1 lateral branches are selected as the second trunk to become fruiting branches, and all other lateral branches and regenerated branches on the double trunk are removed. During production, 4-8 ears can be selected for coring of each trunk.

(3) Single-stem head-changing pruning method: On the basis of single-stem pruning, when the number of spikes on the trunk reaches 4-5, coring is carried out. When the top fruit begins to swell, choose the upper branch to continue to grow, and pick the core after 4~5 ears of fruit.

(4) Continuous stone removal and fruit setting method:

On the basis of single stem pruning, when the trunk is 2-3 ears of fruit, the trunk is removed from the top and core, twisted and bent to one side, and a branch is selected below the twisted part of the trunk to replace the trunk for planting. After the second trunk bears 2-3 ears, it continues to twist and bend to the other side, and then one branch is selected under the twisted part of the second trunk to cultivate the third trunk, and so on.

3, reasonable topdressing:

Tomatoes blossom and bear fruit at the same time, so the nutrition supply should keep up. When the first ear of fruit swells, topdressing urea 15 kg per mu with water; When the second ear swells, topdressing urea, per mu 10 ~ 15 kg; With the increase of fruit size, the number and amount of watering gradually increased, and urea was topdressing 10 ~ 15 kg per mu to improve the fruit setting rate; Spraying potassium dihydrogen phosphate150 ~ 200g and urea100g on the leaves for 2 ~ 3 times during fruit expansion.

4, flower protection and fruit protection: clear up the accumulated water in the field in time, and plow and sow when the soil humidity is too high. Spraying potassium dihydrogen phosphate 150 ~ 200g+30g/ mu of available boron on the leaves at flowering stage, and adding 60 kg of water for topdressing outside the roots to promote fruit setting.

5, pest control:

In rainy weather, tomatoes are prone to diseases such as late blight and virus disease. Virus diseases are mainly prevented by spraying virus fast 1000 ~ 2000 times solution or 20% virus A500~700 times solution or 20% virus spirit 500 times solution. To control tomato late blight, 800 times of 77.2% spinosad or 800 times of 75% chlorothalonil wettable powder can be sprayed every 7-8 days 1 time for 2 times.

6. Timely harvesting: tomatoes ripen 60 days after flowering, and are picked in batches according to the principle of "one batch ripens, one batch harvests". Fruits cannot be picked with fruit stalks to avoid stabbing other fruits.