Causes and Control methods of Cucumber wilt

Cucumber is one of the common vegetables in daily life, and the phenomenon of plant wilting often occurs in the process of planting in the greenhouse, the leaves of the whole plant suddenly wither in a short period of time, the plant slowly loses its ability to bear melon, and serious causes death of the plant. Moreover, the withering phenomenon will be aggravated year by year, which will seriously affect the yield and quality of cucumber. So how can there be those that cause cucumber wilt? How to prevent and cure it? Let's get to know it.

1. Acute atrophy

The growth of the plant was normal, but the leaves suddenly withered at noon on a sunny day and recovered in the evening. The discoloration of the vessel was found at the base of the stem, and there was no milky outflow. The main reason is that the plant can not carry out photosynthesis and the root activity is weak because the grass is not uncovered in continuous cloudy days. Once on a sunny day, the temperature in the greenhouse increases, the air humidity decreases, the leaf transpiration is fast, and the root system absorbs water weakly. The leaves will wither.

Prevention and control methods: continuous cloudy days, if sunny days, it is not appropriate to uncover all the grass at once, it is best to uncover a part of it first, and then gradually uncover it all. When the leaves wilt seriously, you can also use sprayers to spray water on the leaves to prevent excessive wilting from causing damage to the leaves.

2. Flood irrigation

After irrigation, the soil water content is high and the air permeability is poor, which produces toxic substances in the soil under anoxic environment, which makes the root system poisoned or suffocated by hypoxia.

Prevention and control methods: fully water the cucumber 15-20 days before planting. If the soil layer is too deep, the border should be leveled after watering, so that the soil can reach the standards of depth, penetration, fineness, flatness and compactness. Drip irrigation is suitable for watering, avoid flood irrigation, remember flood irrigation, ploughing and loosening soil in time after rain to increase permeability.

3. Root nematode

Root nematodes are generally distributed in the soil layer of 3-9 cm, and the damaged roots will form nodules and gradually swell. After the root tissue is destroyed, the absorption and transport of fertilizer and water are blocked, which makes the plants short, the leaves turn yellow, and die in severe cases.

Control methods: the control of root nematodes should be carried out before planting, and the soil should be disinfected and sterilized with drugs. The disease can be controlled by root irrigation with carbendazim and chlorothalonil, and the effect is better.

4. Excessive concentration of fertilizer.

Excessive fertilization, especially when chemical fertilizer is applied near the root and stem of cucumber, is very easy to burn the plant. The application of nitrogen fertilizer will decompose the species in the greenhouse and produce ammonia. When the temperature rises, the excessive concentration of ammonia will lead to the death of the plant.

Control methods: in the process of planting, we should pay attention to less quick-acting chemical fertilizer, more rotten organic fertilizer, extra-root fertilization and spraying foliar fertilizer, which can also provide nutrients for plant growth.

The above is the introduction of the causes and control methods of cucumber wilt. I hope it can help you. If you want to know more about it, please follow us.