At present, most of the tomatoes are in the late growth stage, and the late management of tomatoes is very important for their production performance. This period is also a period in which the farmers are easy to neglect management. Many vegetable farmers have begun to neglect management, and the results often cause the disease to occur frequently and prematurely defeat in the late growth stage of tomatoes. It directly affects the yield and quality of the fruit. This period should mainly do the following:

First, strengthen management to prevent plants from losing prematurely

In the late growth stage of tomatoes, because the branches are too long, the roots transport the nutrients to the top for a long time, and the nutrition is often insufficiently supplied, which causes the plants to lose. Therefore, this period should strengthen management to avoid premature aging of plants. The main points should be as follows:

1, to pick up the heart, leaf, and snoring in a timely manner.

After the tomato sits on the last ear of the fruit, it should be topped in time. The side branches that grow out during the day should be wiped out in time. The old leaves, yellow leaves and diseased leaves in the lower part of the plant should be removed in time to reduce nutrient consumption. Concentrate nutrients in the plants to promote fruit enlargement.

2. Spray foliar fertilizer and plant growth regulator.

After the last spike of fruit is swollen, the plant does not need to be re-applied. If the plant has symptoms of deficiency or loss, it should be sprayed with 1200 times of Naduobao, and the effect is better.

Second, nutrient management must keep up

Because tomatoes need a higher amount of fertilizer, in the case of applying base fertilizer, it is still necessary to carry out reasonable topdressing. The method of topdressing is: one quick-acting compound fertilizer is applied once after the seedling is slowed down until the flowering, and the dosage per acre is 10-15 kg. After the first ear is hung, the fruit is re-purchased once; the top dressing is very important, which can accelerate the expansion of the first ear, increase the rate of the second and third ear fruits, and promote the three-fold effect of plant vegetative growth. .

Later, combined with the fruit harvest, supplement the topdress 2 to 3 times. In the result period, the type of topdressing should be selected from large manure or special compound fertilizer, and the amount of topdressing should be flexibly controlled according to the plant growth status. Generally, it is 30% of the manure per 10 mu, or about 10 kg of special compound fertilizer. In the peak period, in order to improve the fruit quality and improve the fruit rate, 1% of superphosphate or 0.10% to 0.30% of potassium dihydrogen phosphate may be sprayed on the foliage.

Third, reasonable watering

The general method of irrigation is: planting and pouring the foot "root water". In the slow seedling period, the rooting water is poured 1 or 2 times according to the soil condition. After the seedling is slowed down, it should be poured 1~2 times in a timely manner before flowering. From seeing flowers to flowering and fruit setting, water should be properly controlled. Because too much water is poured during this period, the humidity of the air will increase, causing the pollen to be less fertilized and causing the falling flowers and fruits.

When the first batch of fruit grows to about 3 cm, pour 1 "stable fruit water" to ensure the expansion of the fruit; this irrigation must be mastered. If the irrigation is too early, it will easily cause the growth and fruit drop. If it is too late, it will affect the fruit. development. After entering the fruiting period, when each batch of fruit begins to expand, it must be poured 1 or 2 times of "strong fruit water", and the amount of water can be appropriately increased.

The irrigation of tomato fields should be watered. In this way, the infection of the disease can be reduced. If it is a ditch irrigation, the water can not be smashed, and the speed can be arbitrarily sifted as soon as possible, just to make the soil moist. Where conditions permit, it is best to install a micro-spray or micro-drip facility to save a lot of water and to promote the growth and development of the tomato.

Fourth, prevent the occurrence of pests and diseases

If it is neglected, tomatoes will cause pests and diseases during this period, which will not only affect the yield of tomatoes in the later period, but also the pathogens that spread around will still remain in the shed to harm the next vegetables. Therefore, in the late stage of tomato, effective measures should be taken to prevent the occurrence of pests and diseases. The main aspects should be as follows:

1. Set an insect-proof net at the air outlet to prevent pests such as aphids, mites, thrips, and whitefly from sneak into the shed, directly harming vegetables or introducing viruses into the shed to infect vegetables. For the pests sneaked into the shed, yellow plate trapping can be set in the shed, and 3% acetamiprid 1500 times mixed with 10% imidacloprid wettable powder can be used for prevention and control.

2. Prevent in advance. In general, the diseases that occur in the late stage of tomato are leaf mold, viral disease and bacterial leaf spot.

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