Farmer Master Liu is a melon grower, these days Master Liu encountered trouble, watching the melon just come out, but can not be happy. Master Liu said: "The temperature in the summer greenhouse is high, the sun is strong at noon, watching the melon seedlings wilt, it can return to normal in the afternoon, but in less than five days, the whole plant will wither away." The workers all said it was a disease, and I didn't think about taking medicine in advance. ”
Melon plant wilting, a common symptom during the summer heat, wilts at noon and returns to normal in the morning and evening. When many farmers encounter this situation, they think of disease. For example, wilt wilt, the onset is relatively slow, and the plant changes from cyan to yellow. It may also be a bacterial disease, the inside of the stem rots, there is mucus, but the outside is normal. When this disease occurs, it should be treated with root irrigation with xanthocyllus and copper preparations in advance, and the disease will improve.
Master Liu said: "This is the first time to plant this year, generally speaking, there is no heavy stubble planting, the disease will be less, and there is a fungicide dipping root when planting seedlings." Pull out a tree and look at the base of the stem, there is indeed no disease appearing, it should not be the wilt caused by the disease, but seeing that the root growth of the melon is poor, there is no capillary root, considering Master Liu's lack of planting experience, it may be physiological wilt caused by improper watering. ”
Master Liu remembered that at two or three o'clock in the afternoon, when the weather was hot, he saw that the melon seedlings were withering and began to water. He thought that drought watering was a normal process and ignored this mistake. After the greenhouse is shaded at noon, the temperature in the shed can reach more than 30 degrees when it is high, the sunlight is strong, the transpiration of the leaves is large, and the plant will wilt, which is a common situation, including other vegetables.
If the plant appears to wilt immediately after the plant appears, it will not only not alleviate the wilting, but also hurt the root system of the plant and directly wither. Because the soil temperature is high, the temperature of the well water is low, after going deep into the soil, the root system suddenly encounters cold water, which will hurt the root system, and the plant will wither after a long time, which has nothing to do with the disease.
Therefore, when watering, the water temperature should be as close as possible to the ground temperature, and the time of watering should be exquisite. Summer temperatures are high, and irrigation is carried out at four or five o'clock in the morning during drought, which is close to the ground temperature and does not cause damage to the root system. Short-term wilting, if no disease occurs, is a normal phenomenon and cannot be blindly watered.
Although watering is a simple agricultural operation, it is not right, which has a great impact on the growth of melons. Including open-field planting is the same, why the more watering the drier, the more watering the more wilted, the reason is that after watering, the root system is damaged, the root system is not good, then the plant will soon die.