Early spring tomato seedling precautions

With the development of facility vegetable industry, the planting area of tomato is constantly expanding. in order to produce high benefit, the whole seedling is very strong. The following points should be paid attention to in early spring.

1. Seed disinfection: to control tomato leaf mold, spot blight, early blight, canker and other diseases, we should choose the method of soaking seeds in warm soup, that is, putting the seeds in 55 ℃ hot water, stirring and soaking seeds for 15 minutes, then soaking them in 30 ℃ warm water for 4 hours, then picking them out and accelerating germination in 30 ℃ environment. To prevent and cure virus diseases, you can choose 10% trisodium phosphate solution to soak the seeds for 20 minutes and then wash them with clean water to promote germination.

2. Disinfection of seedbed soil: after the bed soil is thoroughly watered before sowing, the seedbed is sprayed with 72.2% Purek water agent 500 times 600 times, spraying 2kg per square meter. Or carbendazim disinfection, every 1000 kg of bed soil with 50% carbendazim wettable powder 25g 30 grams, treatment, first mix carbendazim into an aqueous solution, and then spray on the bed soil, mix well and then tightly cover with plastic film, generally after 2-3 days to kill the soil Fusarium wilt and other pathogens.

3. Early application of base fertilizer: the fertilizer applied during the preparation of nutritious soil is sufficient, and there is no need to apply fertilizer during the whole seedling stage. if it is found that the color of seedling leaves becomes lighter and the symptom of fertilizer deficiency occurs, a little quality guaranteed 500-fold solution of potassium dihydrogen phosphate can be sprayed.

4. Temperature regulation is proper: after completing the seedlings, the temperature of the seedling bed must not be on the high side, so that the seedlings can grow healthily, enhance cold resistance and disease resistance. During the period of "two leaves in one heart", it must not keep up with the heat preservation measures of the seedling bed. If the temperature remains low, it will hinder the differentiation of flower buds, and the drop of flowers and fruits in early spring will be serious, affecting the early yield. At noon on a sunny day, the temperature of the seedling bed is easy to be on the high side, so as to prevent the seedlings from wilting or dying due to excessive temperature difference and excessive water loss.

5, do not make the seedling bed humidity is too big: the seedling stage generally does not need watering. When it must be watered, choose sunny noon and warm water. Avoid excessive watering, in case the seedling bed is too large, leading to rotten eyes, stiff seedlings and disease breeding. In order to prevent the excessive humidity of the seedbed after application, plant ash or fine dry soil can be sprinkled to absorb moisture.

6, do not make the seedlings see insufficient light: seedlings overwintering stage, often encounter continuous overcast weather, at this time the external temperature is very low, many vegetable farmers do not dare to uncover the grass curtain, resulting in seedlings without light for many days, affecting the formation and development of cauliflower seedlings due to malnutrition. To increase the light, always keep the mulch clean, and uncover the grass curtain as early as possible. Cloudy days should also be normal to uncover the grass curtain, as far as possible to increase the lighting time.

7, do not ignore the prevention of diseases and insect pests: the seedling stage is easy to occur blight, quenching disease and so on. In the early stage of the disease, the diseased seedlings should be removed first, and then protected by spraying in time to prevent spread.

8. Do not plant seedlings without planting: 5-7 days before planting, seedlings should have a seedling-refining process to enhance seedling resistance and adapt to the environment after planting. Do not plant seedlings directly to prevent environmental discomfort after planting, resulting in slow seedling growth and serious seedling death after planting.