Is it difficult to raise seedlings in summer? Master these points, don't be afraid!

Vegetable seedlings in summer are often caused by rotten seeds, rotten roots, dead seedlings, uneven emergence, and leggy due to high temperature, heavy rain, exposure, and pests. The "five preventions" policy for seedling raising in summer:

high temperature

It can be shaded and cooled by internal and external shade nets, water curtains and fans. When the temperature is too high, it can also be cooled by spraying well water on the shed film. In areas with conditions, ice cubes can also be purchased and put into the shed. The method can be used alone or comprehensively, and the temperature can be lowered by 2°C to 6°C.

rainstorm

In summer, heavy rain and heavy rain will suddenly increase the air humidity. If the drainage is not smooth, it will be poured into the nursery greenhouse, resulting in damage to the nursery greenhouse and facilities, which is very unfavorable for the normal development of nursery. Therefore, when raising seedlings in summer, a drainage plan must be prepared, drainage facilities must be checked in advance, and the shed film should be repaired in time.

Drought

In summer, the temperature is high, the light is strong, the evaporation is large, and the substrate is easy to dry. If the watering is not timely or the amount of watering is too large, the substrate becomes dry and wet, which is very easy to cause stem rot. The growth of the seedlings should be carefully observed, the dryness and wetness of the substrate should be checked, and appropriate watering should be done in time. Avoid watering during the midday heat.

Anti leggy

When raising seedlings in high temperature season, the temperature difference between day and night is small, and the night temperature is high, which can easily cause leggy seedlings. In terms of seedling management, ventilation should be increased in time, seedlings should be divided and thinned, and chemical control agents should be sprayed in time. This can prevent slender internodes, thin stems and leaves, make the seedlings thick, dark green leaves, thickened leaves, and promote flower bud differentiation.

pest control

Vegetable seedlings in high temperature seasons are susceptible to viral diseases, and are prone to insect pests such as aphids and planthoppers. The following measures can be taken to prevent

(1) Select anti-virus varieties;

(2) Soak the seeds in 1000 times of 10% trisodium phosphate solution for 10 minutes, and then rinse the seeds with clean water;

To sum up, summer seedlings face many unfavorable objective factors. It is necessary to prepare seedling plans, division of labor, facility maintenance, and material preparations in advance, select suitable varieties with heat resistance, high temperature resistance and virus resistance, and through scientific, ecological, and low-cost methods. Ways, methods and technical means to successfully complete the nursery work in the high temperature season.