Tomato seedlings bloom before they grow, can they grow if they are sprayed?

Tomato seedlings bloom before they grow, and if the spray seedlings do not grow, it has no effect on tomato growth. The tomato seedlings bloom before they have grown, probably because the tomato grows with insufficient nutrients, and after they are removed, organic fertilizer is then added.

1. Tomato is a thermophilic vegetable, under normal conditions, the optimal temperature for assimilation is 20 25, and the optimal soil temperature for root growth is 20 22. Increasing soil temperature can not only promote root development, but also significantly increase the content of nitrate nitrogen in the soil, accelerate growth and development, and increase yield.

2. Tomato is a light-loving crop, with a light saturation point of 70000lx and a suitable light intensity of 30000 50000lx. Tomato is a short-day plant, in the process of shifting from vegetative growth to reproductive growth, the basic requirements are short-day, but the requirements are not strict, some varieties can bud and bloom in advance under short-day sunshine, and most varieties bloom earlier in the sunshine of 11 13h, and the plant grows robustly.

3. Tomatoes need more water, but they do not need to be irrigated frequently, and generally the soil moisture is 60 80% and the air humidity is 45 50%. The high humidity of the air not only hinders normal pollination, but also causes serious diseases under high temperature and high humidity conditions.

Tomato seedlings bloom before they grow, and spray seedlings do not grow, which does not help growth.

1. Symptoms: Tomato root-knot nematode disease mainly harms the roots of plants, mostly on fibrous roots or lateral roots, so that the roots appear swollen and deformed, in the shape of chicken claws, and milky white nematodes can be seen buried in the roots. The upper part of the plant behaves:

Stunted growth, yellowing of leaves, dwarf plants, few and small fruits, low yield, poor quality. In times of drought, diseased plants tend to wilt until the whole branch dies.

2. Pathogenesis: The pathogen is southern root-knot nematode, which overwinters in the soil with 2-3 instar larvae or eggs with diseased residues, and spreads through diseased soil, diseased residues, and diseased seedlings with fertilization, irrigation and agricultural operations. Root-knot nematodes are generally harmed in the soil layer above 30 cm, and the soil layer of 5-20 cm is the most distributed.

It is seriously harmful in the plots with high and dry terrain, loose soil, appropriate humidity and low salinity. The disease is severe in multi-year continuous cropping plots. According to the investigation, the initial infection of tomato root-knot nematode disease in Angezhuang Town, this county may be the diseased seedling soil of the peanut field.

3. Prevention and control methods:

In order to control the occurrence of pathogens in the protected area, reduce the initial infiltration of the field**, take agricultural measures to prevent and control the disease, combined with the necessary chemical control.

1) Agricultural prevention and control

1. Raise seedlings with disease-free soil, apply pathogen-free decaying organic fertilizer as base fertilizer, and select disease-free seedlings for planting;

2. Completely remove the sick and residual bodies: clean up the sick and residual bodies after harvesting, especially the tomato roots, and take them out of the field to burn them intensively;

4. Crop rotation: Seriously diseased fields and gramineous crops or with onions, garlic, leeks and other crops in rotation for 2-3 years, it is best to plant 1 crop of rice;

5. Use high temperature to kill nematodes: the shed can use the high temperature in summer in the summer leisure season, dig ditches and ridges in midsummer, irrigate in the ditch, cover the ridge with plastic film, and close the shed for more than 15 days, so that the temperature of the 30 cm soil layer reaches more than 54, keep it for more than 50 minutes, and can kill most of the nematodes;

2) Pharmaceutical prevention and control

1. Soil treatment: before sowing or 15 days before planting, use 3-5 kg of granules such as 10% Limanku, 50% Yishuning, and 3% Milel to mix the soil and turn it deeply; Before planting, use insect mite gram or avi insect clearing, the amount per mu is 1 liter, mixed with water 5000-6000 times of liquid, furrow application or hole application, and then seal the ridge, 1 month later, in the irrigation once, the validity period can reach 20 days, and the control effect is more than 90%.

2. Irrigation of pesticides: After planting, when the plants are locally damaged in the shed, the roots can be irrigated with 1500 times of 50% phoxanthion emulsifiable concentrate, and each plant is irrigated with kilograms, and the root-knot nematodes in the soil are killed by fumigation.

Hello, the flowering of tomato seedlings may be caused by insufficient water**, when the water** is insufficient, the seedlings will enter the reproductive growth stage prematurely. Because tomato leaves have a strong transpiration effect, in order to avoid premature flowering, the soil should be kept moist, and the surface of the soil should be watered thoroughly if it is whitish. In addition, excessive phosphorus and potassium fertilizer at the seedling stage will also cause tomato seedlings to bloom, and excessive growth momentum will inhibit vegetative growth.

Therefore, nitrogen fertilizer (all kinds of soybean cake) should be used as the main fertilizer in the seedling growth stage to promote the vigorous and lush branches and leaves.

It is okay to pinch the top of the non-flowering skin of the tomato seedlings, so that the nutrient supply can be forked and flower buds can grow.

Extend. How to pinch the tip of the tomatoes.

Tomato pinching and forking is best operated on a sunny day, forking is to remove the excess side forks of tomatoes, when the tomatoes are flowering and fruiting, it is necessary to pinch the growth point at the top of it to improve the fruit setting rate of tomatoes, note that the first time to fork tomatoes needs to be carried out when there are about 30 cm on its side branches.

Tomatoes pinched tip fork method.

1. Time requirements.

Tomato pinch and fork need to be carried out at the right time, generally it is best to operate in a sunny day, so that after pinching the tip and forking, it is conducive to the healing of the tomato wound, and it is not suitable to operate in rainy weather and dewy morning, otherwise the wound of the tomato is in contact with water, and it is easy to rot.

2. Cross-cutting method.

Tomatoes are mainly forked on the side branches, and the side forks under its first spike flowers should be knocked off as soon as possible, which can reduce the consumption of nutrients and is conducive to the growth of tomato fruits.

3. Pinching method.

When the tomato is flowering and fruiting, it is necessary to pinch the growth point at the middle of the top posture, which can improve its fruit setting rate, if the tomato branch is too long, then it is also necessary to pinch the tip and prune, and some excess side branches and dead old branches and leaves should also be cut off to improve the ventilation and light transmission of the tomato plant.

4. Precautions.

Pay attention to the first fork of tomatoes, until most of the side branches of tomatoes have about 30 cm can be carried out, otherwise the forking too early may make the tomatoes appear to grow poorly, and then the branches and forks that grow out can be removed when there are 5 cm, and each fork can not be excessive.

After the first flowering and fruit setting of tomatoes, spray the vegetable fruit Zhuang Tiling once, and then spray the second and third times every 7 days, which can improve the water and fertilizer absorption of tomatoes, improve the yield and quality of fruits, reduce the rate of fruit drop, and reduce the incidence of cracked fruits, stiff fruits and deformed fruits.

<> tomato seedlings bloom prematurely, at this time, the root system of tomato is still weak, and it is necessary to carry out thinning and disturbing branch management, that is, to remove the tomato flowers directly, so that the nutrients can be supplied to the root system and plant growth, but if the tomato seedlings grow well, 1-2 flowers can be left appropriately.

Tomato seedlings do not swell the fruit, or the fruit is small, generally because of the use of too much nitrogen fertilizer, too much nitrogen will not only cause the growth of tomato seedlings, but also slow down the differentiation of tomato flower buds, nutrients are difficult to reach the fruit, so it will cause this phenomenon, you can give tomato foliar spraying, spraying powder powder potassium dihydrogen phosphate + amino acid foliar fertilizer, is conducive to promoting tomato fruit expansion, and at the same time can control the growth of tomatoes, with the root of the flush Shi Ribery Yanwo high potassium water-soluble fertilizer, preferably containing 44 potassium, The puffed fruit is obvious and safe, and there is no harm.

There are two causes, one is the problem of sunlight, and the other is the temperature problem of sunlight.

Tomatoes are a kind of plant that grows outdoors, it is light-loving, suitable for growing in sunny places, such as the balcony on the light is little, the plant does not grow fast enough, and the seedlings begin to fork.

The method of planting tomatoes on the balcony is very simple, try to put the tomato plants in a sunny place, it is best to maintain them in full sun, and at least ensure that the tomato plants are exposed to more than 5 hours of light every day, so that the tomatoes will bloom and bear fruit.

Tomatoes are not a very heat-tolerant plant. The balcony has strong sunlight and there are too many buildings in the city, which has a heat island effect. High summer temperatures can cause plants to wilt, dehydrate, grow branches, have more leaves, and make tomatoes shorter.

If the temperature in the summer is too high, try to avoid growing tomatoes during the hottest part of the summer. If the temperature is good, let the plants be kept in a cool environment as much as possible.

This phenomenon is mostly caused by the following factors: (1) Excessive application of nitrogen fertilizer, sufficient water, seedling growth, leaf hypertrophy, heavy shading, fruit does not see sunlight, slow growth, and difficult coloring. Nitrogen fertilizer will also inhibit the absorption of potassium, calcium, magnesium and other fertilizer elements by the root system, induce the occurrence of rational tendon rot fruit, and poor fruit coloring.

2) The height of the plant is more than 160 cm, the lower leaf curtain layer has weak light, low temperature, slow fruit growth, and is not easy to color. Prevention methods: (1) Reduce the use of nitrogen fertilizer, appropriately increase phosphorus and potassium fertilizer and micro fertilizer, control irrigation before fruit set, and prevent seedlings from growing.

2) 2-3 days before watering, combined with spraying, spray 2000 times of the plant to help the strong liquid to prevent leaf growth hypertrophy and avoid insufficient light between the rows. (3) Strictly control the height of the plant at about 150 cm to prevent the deterioration of the lower light and low temperature. (4) The scientific use of "Tianda 2116" can improve the ability of tomato to resist stress, low temperature and weak light, and enhance the photosynthesis of leaves.

5) Proper leaf thinning to improve the lower light conditions.

Normal, the date has arrived, and it hasn't grown tall enough to be like that.