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Prevention and treatment of acute atrophy of cucumber in greenhouse
Some cucumber plants in the greenhouse suddenly appeared acute atrophy, and the farmers were often confused and had to plough and replant. In fact, this acute atrophy of cucumber is a physiological disease.
First, the cause of formation
1. It is the continuous rain or snow, and the steepness causes the inversion to quickly wilting the dead seedlings.
2. It is the cucumber entering the flowering and melon period. It is high temperature on sunny days, the amount of air is large, the leaves are transpiration fast, some plants with poor roots begin to shrink, and the whole plants withered water are withered.
3. The film covered by the greenhouse is partially damaged, and the cold wind invades and causes the wilting dead seedlings.
4. The concentration of fertilization is too large, especially the application of chemical fertilizer near the roots of cucumbers, which is extremely easy to burn and kill.
Second, the prevention and control measures
Watering due to seedlings: The root system of cucumber is more developed, but it is concentrated in the soil surface. In order to promote hair roots, avoid watering mistakes to inhibit root population growth.
1. Less watering.
2. It is the pouring of seedling water as appropriate, the temperature is low, the soil moisture is large, and it is exposed to rainy weather, with less pouring or no pouring back.
3. It is the time to enter the season of melon, combined with topdressing, with water and fertilizer, once every 10 days, to prevent excessive burning of melon seedlings.
4. It is advisable to water the water on a sunny day and avoid watering in the afternoon and evening.
5. It is not suitable for irrigation in the whole shed on a rainy day.
6. It can only be infiltrated with small water, and it cannot be flooded with large water. Scientifically control the shed temperature: Generally, it is not ventilated at the initial stage of planting. It is kept at 25 °C ~ 30 °C during the day and 12 °C ~ 15 °C at night, not less than 10 °C. With the continuous growth of melon seedlings, it is necessary to adjust the temperature and temperature in time to prevent the occurrence of diseases; However, the regulation of temperature must be conducive to the growth of cucumber. Generally, the temperature rises to 30 °C during the daytime, and the membrane is closed when it drops to 28 °C in the afternoon. The nighttime temperature during the melon period should not be lower than 12 °C.
Third, strengthen the protection of greenhouses
1. Keep the ditch around the shed plant cucumber unblocked for timely irrigation and drainage, especially for quick water filtration.
2. It is necessary to check whether the shed film is damaged or exposed every day. Pay attention to repair and keep warm and warm.
3. To cover the grass vines and fix the ropes before the wind blows down, in order to prevent the steep film wound and the melon seedlings.
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