Cause Analysis of Yellow Leaves of Melon (Muskmelon)

Melon is also called melon, white melon, sweet taste, more moisture, popular with people, market sales are better, but melon planting also has some problems, today's small editor to say the reason for melon yellow leaves.

1. Deficiency

Melon needs a variety of nutrients when growing, and the main reason for yellow leaves is lack of nitrogen, phosphorus, potassium, calcium, iron, copper and magnesium, which will lead to yellow leaves, and each deficiency symptom is different. Nitrogen deficiency leaves turn yellow green, old leaves dry, new ones are small and few, phosphorus deficiency plants are short, leaves are dark green without light, potassium deficiency leaf edges first yellow, gradually scorched, serious, lead to the whole leaf withered, calcium deficiency will lead to yellow leaf edges, However, the old leaves remain green, iron deficiency will cause the leaves to be pale yellow, but the veins are still green, the whole leaves will lose green and fall off later, copper deficiency will cause the green of the leaf tip to gradually turn pale, magnesium deficiency will cause the leaf color to yellow, especially the leaf tip is the most obvious, but the veins remain green.

2, fertilizer damage

The yellow leaves caused by fertilizer damage are somewhat similar to the lack of nutrients. If excessive fertilization is applied during planting, it will lead to fertilizer damage to the plants. This is also a common cause of yellow leaves, especially after fertilization or spraying, generally yellow leaves will appear within 1-2 days. Moreover, the area is larger and more common. Yellow leaves caused by fertilizer damage can be alleviated by increasing watering or spraying urea foliar fertilizer.

3. Climatic reasons

Melon yellow leaves are also related to climate. Many farmers adopt black film mulching technology to improve ground temperature and speed up the growth speed of melon. However, in summer high temperature and hot period, black film not only likes heat, but also prevents heat dissipation, so it will affect root growth and cause premature aging of yellow leaves. In addition, long-term rainy days or interplant canopy will also lead to leaf yellowing. Therefore, attention should be paid to climate change during cultivation to make correct management.

4. Diseases

In addition, the yellow leaf phenomenon is caused by diseases, among which the representative disease is bacterial leaf blight, also more leaf spot disease, mainly occurs in high temperature and high humidity environment, easy to spread and spread, when the disease occurs, yellow brown spots appear on the leaves, gradually expand and merge, to the late stage will lead to large areas of withered spots on the leaves, resulting in normal photosynthesis of the leaves, streptomycin can be sprayed at the early stage of the disease, and azole fungicides mixed with thiazole copper or lonkejun can be used at the peak of the disease.

The above is melon yellow leaf reason analysis, hope can help you!