Cucumber leaf physiological disease identification

The leaves are thin, the leaves are greenish, the tips of the leaves are longer, and the leaves are longer. The leaves are uneven and slightly scoop-shaped, the petioles are long and sagging, and the texture is crisp or longitudinally cracked and easily broken. This is due to the high temperature and excessive humidity in the soil. Cooling and humidity should be reduced.

The leaves are large, the leaves are swollen and the edges of the leaves curl upwards, and the veins are thin and pale. This is due to the low temperature and excessive soil temperature.

The leaves are large and the leaves are yellow-green and dull. Sometimes there is a circle of yellow-green around the leaf edges, and the tips of the leaves and stems do not stretch. This is due to the high temperature and the fact that the soil is too dry. It should be cooled and watered in time.

The leaves are large, and the dark green leaves grow slowly. The leaves twist to one side and resemble the symptoms of viral diseases. This is due to the low temperature and the fact that the soil is too dry. It should be warmed and watered in time.

The upper leaves of the plants are small, and the leaf margins are revolute in an umbrella shape. The growth points do not stretch and the leaves are dark green. This is due to the excessive use of fertilizers and should be applied properly.

In the morning, the edges of cucumber leaves seem to be hot and hot. There are many angular or round water-soaked spots that gradually disappear after sunrise. This is because the temperature in the greenhouse is too high and the transpiration of the leaves is inhibited. The temperature should be reduced.

Leaves flank leaf veins immersed in sheet-like scars, soft after the first stick, after turning into a gray-green. This phenomenon occurs most frequently in greenhouses or greenhouses where large amounts of unfermented organic fertilizer are applied. This is due to the cucumber "ammonia poisoning" caused by the ventilation and ventilation should be timely, do not apply unfamed organic fertilizer.

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