What is the cause of the withering and dead seedlings of pine cauliflower?

High temperature and drought seriously affected the growth and development of pine cauliflower, high temperature caused cauliflower to be infected with a disease - blight, infected with blight of pine cauliflower, because the water and nutrients absorbed by the root system can not be transported to the upper part of the plant, then there are slender leaves, curled and dull, the plant is thin, the nutrition is insufficient, and the withered and dead seedlings.

If you want to grow pine cauliflower in the future, the suggestions are as follows:

1) Sowing in moderation, generally not too early, try to avoid the high temperature and dry season, summer pine cauliflower is easy to get sick in the environment of more than 35, so it is necessary to prevent the seedling stage, especially within 15 days after planting, the soil is high temperature and drought (after planting 15 days, the root system is deeper, the leaves are larger and also play a shading role, and the harm of high temperature will be reduced).

2) Try not to plant with cabbage vegetables or herbicides such as glyphosate and paraquat.

3) Strengthen field management. In case of high temperature and high ground temperature in seedling stage, especially within 15 days after planting, the ground temperature is too high in dry years, and it is advisable to water and loosen the soil frequently, reduce the soil temperature around the root system, and ensure the normal development of the root system.

4) If it is a seedling bought in the nursery, do not buy hormone seedlings, long seedlings, old seedlings, these seedlings are slow after planting, poor physiological resistance, underdeveloped root system, and will have small leaves bulb in case of high temperature and drought stress.

Pine cauliflower appeared to wilt and die seedlings. It has a lot to do with the external environmental conditions, which may be the lack of water or the influence of light, or it may be the lack of fertilizer.

Downy mildew. The disease is fast and harmful, and if not controlled in time, it will lead to serious damage to functional leaves and serious crop yield. High density, poor ventilation, excessive humidity, long growth, and internal canopy of crops are prone to diseases, especially high humidity and poor ventilation.

Attention should be paid to prevention: improve and strengthen ventilation and humidity reduction, keep the moisture reasonable, and promote the growth of strong and strong control in a timely manner. Preventive medication:

Dysenlian, chlorothalonil, carbendazim, etc.** Medications: Pulik (downy mildew), manganese-zinc frost, manganese-zinc methalene, enoyl frost ureanitrile, flumorpholine, pyraclostrobin, manganese-zinc frost ureanitrile, etc. According to the local resistance level, 1 to 2 kinds of drugs are selected with Bihu 2g barrel (brassinin can also be used) + potassium dihydrogen (calcium locust cherry boron micro fertilizer, amino acids, chitin, seaweed foliar fertilizer can be) + silicone careful and thoughtful spray! Generally, it is necessary to spray 3 times with an interval of 5 to 7 days.

Generally, the temperature is low in winter, and it is recommended to spray in the morning to drain the humidity in time!

The growth of pine cauliflower leaves is too vigorous, which will cause the nutrition of the flower bulb to be stupid, the growth is not good, and the flower bulb is small.

The leaves of pine cauliflower are many and thin, up to 17 23 in the middle and late stages of growth, 6 8 more than ordinary cauliflower varieties, the amount of steamed vines is large, and the phenomenon of water loss and wilting in the field often occurs, especially in the continuous rain after the sudden sunshine, after the storm water, or under the conditions of high temperature, drought and strong light, the wilting phenomenon is particularly obvious. Therefore, the soil of the vegetable plot where pine cauliflower is grown should not be too wet to cause roots, nor too dry to cause water shortage.

In general, methods and measures such as ditch drainage, timely watering, soil cultivation, grass mowing and mulching, etc., are used to adjust the soil moisture status in time, strive for a balanced water supply, and keep the soil moist and loose. In times of drought, irrigation and watering are prohibited, and flooding is prohibited; Drain water in time after rain, and prohibit water accumulation in front of the limbs in the field. Before planting live trees in summer, it should be watered once a day in the evening in case of drought, and it is best to shade it in the heat and strong light.