Causes of Acute Atrophy of Cucumber in Greenhouse and Control Measures
In the greenhouse, some cucumber plants suddenly became acutely atrophic. The melon farmers were often puzzled and had to plough and change crops. In fact, this acute atrophy of cucumber is a physiological disease.
First, the formation of reasons
The first is that persistent rain or a sharp snowfall after snow leads to a rapid wilting of dead seedlings.
The second is that cucumbers enter the flowering and nectar stage, and are sunny and high-temperature, with a large amount of deflation, and the transpiration of leaves is fast. Some plants with poor hair roots begin to shrink, and those with severe water loss are withered.
Third, the film covered by the greenhouse was partially damaged, and cold winds caused a wilting dead seedling.
Fourth, the fertilizer concentration is too large, especially when the fertilizer is applied near the roots and stems of cucumbers, which can easily cause burns.
Second, prevention and control measures
Watering due to seedlings: The root system of cucumber is relatively developed, but most of it is concentrated on the soil surface.
In order to promote rooting, avoid watering errors and inhibit the growth of root groups.
The second is pouring water back to the seedlings as appropriate. The temperature is low, the soil moisture is high, and even rainy weather is encountered, and little or no water is returned to the seedlings.
The third is to enter the period of fruit melons, combined with topdressing, with water, fertilizer, pouring once every 10 days or so, to prevent excessive fertilization 1 melon seedlings.
The fourth is to water in the sunny morning, avoid watering in the afternoon and early evening.
Fifth, rainy days should not be filled with water in the entire shed.
Sixth, only small water infiltration can not flood irrigation. Scientific control of greenhouse temperature: In the initial stage of colonization, it is generally not ventilated, kept in the shed during the day at 25°C to 30°C, and kept at 12°C to 15°C during the night and not less than 10°C. With the continuous growth of melon seedlings, it is necessary to adjust the temperature and control the temperature in time to prevent the occurrence of diseases; second, to avoid plant aging. However, the regulation of temperature must be conducive to the growth of cucumbers. Generally, the temperature rises to 30°C during the day and it is ventilated. In the afternoon, the film is closed at 28°C. The night temperature during the melon period should not fall below 12°C.
Third, strengthen the protection of greenhouses
The first is to keep the canals around the canned cucumbers unblocked for timely drainage and irrigation, especially for rapid water filtration.
The second is to check whether the shed film is damaged or exposed every day. Pay attention to repairs, so as to maintain warmth and warmth.
Third, before the onset of strong winds, grass vines will be stamped and the ropes will be fixed to prevent the film from injuring the melon seedlings.
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