Causes of wilting and dead seedlings of muskmelon and its control measures

In the process of muskmelon planting, the grafted seedlings in greenhouse in early spring are prone to acute wilting and death, light or small area, and even no harvest in individual fields, which seriously affect the planting efficiency of muskmelon. So what is the cause of muskmelon wilting and dead seedlings? How to prevent and cure it? Come and have a look with the editor.

I. the cause of occurrence

1. Variety

The disease resistance of muskmelon varieties is different, some varieties have strong disease resistance, which is lower than that of the external environment, and the seedling death rate is very low, while some varieties have low disease resistance and poor adaptability to the local environment, so the seedling death rate will be higher.

2. Climate impact

During the growing period, the grafted melon encountered long-term English weather, low temperature and low light, the light duration was less all the year round, the light intensity was also lower than that of the normal year, the temperature was 2-degree lower than that of the normal year, the temperature during the fruit setting period rose sharply, and the temperature in the greenhouse could not be ventilated. At noon, the temperature in the greenhouse reached about 50 ℃, and the plants at both ends of the greenhouse showed normal, while the plants in the middle of the greenhouse wilted in varying degrees.

3. Improper cultivation and management.

Improper sowing time, too early, resulting in weak root system, large but not thick leaf area, less dry matter storage, and high soil water content will inhibit root respiration, which is extremely disadvantageous to root growth, especially to capillary roots. wilting dead seedlings appear.

4. Diseases and insect pests

Because of the long planting years, the root nematodes are widely irrigated, and the resistance of the seedlings is poor, which will cause acute fusarium wilt after being damaged by the root nematodes. In addition, the wilting of Fusarium wilt and root rot disease and the decrease of physiological resistance of plants will also lead to faster and more serious Fusarium wilt disease and higher seedling death rate.

II. Prevention and control measures

1. Select the right variety

When selecting rootstocks and scions, we should consider not only grafting affinity, but also symbiotic affinity, especially the performance of symbiotic affinity under adverse weather conditions.

2. Fertilizer and water management

In watering, we should grasp the principle of a small number of times, each drip irrigation time should not be too long, at the same time, timely and appropriate supplement of magnesium, calcium and other micro-fertilizers.

3. Spraying multiple frustrations before and after fruit setting can be controlled up and down, stimulate root growth and root hair growth, inhibit vegetative growth, promote reproductive growth and increase fruit setting rate.

4. Pest control

In the spreading period, attention should be paid to the control of root nematode disease, and attention should be paid to the prevention and control of root rot disease.

The above is the introduction of the causes and control measures of melon wilting and dead seedlings. I hope I can help you. If you want to know more about it, please pay attention to us.