Towel gourd leaves turn white. What's going on?

Towel gourd sometimes found that the leaves whiten, the specific whitening situation is not consistent, so the reasons are not the same, some disease causes, some are the causes of the plant itself, or the planting environment, and then the disease also has different diseases, different symptoms. When we grow towel gourd with white leaves, it is best to observe the symptoms before we know what the cause is and find the pathogen before we can choose the appropriate solution.

1. Virus disease

The main virus disease is actually cucumber green mottle mosaic virus, which mainly harms cucurbitaceae plants. Virus disease is a soil-borne disease, but human field activities can also lead to branch and leaf friction, spread virus disease, and seeds can carry germs. Therefore, it is best to disinfect the seeds before sowing, plant the diseased soil, and not continue to plant, but rotate with other crops. Or the soil should be carefully sprayed with disinfectant and exposure.

2. Plant senescence

When the autumn plant is close to aging, you can find that the leaves sometimes turn white, even some hard, this is the performance of aging, after all, towel gourd is an annual plant, leaves are easy to aging, sometimes some aging cotyledons will appear whitening phenomenon. Some nitrogen fertilizer can be added appropriately to avoid leaf aging in the early stage of growth.

3. Poor ventilation

Sometimes some shady planting areas, or some low-lying planting fields, high humidity, too high planting density, closed environment, can not be well ventilated and transparent, will cause white leaves. In those years, some ferrous sulfate could be poured to improve it, or Yelubao could be used. Pot culture can pour some yogurt. This will relieve the symptoms. It can be planted in a sunny and well-ventilated place in the future.

4. Towel gourd powdery mildew

If it is found that the performance of white leaves is covered with white powder, it is powdery mildew. To treat the disease, it is necessary to prevent and cure it as early as possible. It is best to use 1000 times EC spray to prevent and control the disease. Generally, it should be used every other week to avoid drug damage, but it can not be separated for too long. The effect is not good. It has been used for about 3 times, and the effect is obvious.

5. Towel gourd white spot

Sometimes the surface is white, but it is a white spot, not a whole piece. If there is hyphae behind it, it can be identified as white spot disease. As soon as it is found, 50% carbendazim should be sprayed together with 50% carbendazim wettable powder 1500 times. The effect of single drug was not obvious. It can be cured with about two or three times. There are a variety of agents to choose from in the production of upper leaves.

Towel gourd leaves whiten, first to observe what is the performance, identify what the root causes, and then control the use of corresponding methods to improve, control, so as to keep the plant healthy and grow well.