Why do cucumbers turn white leaves?
Cucumber leaves may turn white because of a tick that has settled on the leaves.
If white spots appear on cucumber leaves, then it is powdery mildew. This is when the leaves appear white or gray bloom. This disease is caused by fungi that multiply and infect the leaves. The reason is usually excessive watering, excessive moisture.
Processing is urgently required. You can try to spray with a solution of potassium permanganate: for 10 liters of water, you need 5 grams of potassium permanganate. You can also buy powdery mildew medications in a specialty store, such as Topaz.
Most likely, a herbivorous mite or aphid started on cucumbers. Bacteriosis can also occur. They are treated by spraying specials. solutions.
If they just brighten, then they do not have enough light, and if they do whiten, then there is only one reason, like all the other participants, I agree that the reason is "powdery mildew". To get rid of this misfortune, you need to buy it in a store (for example, I buy it in a flower shop, a remedy for "powdery mildew" (I don't remember what it's called)). And you also need to water less often and ventilate the plants more often.
If the leaves on the cucumbers turn white, then this is a sign of a disease called powdery mildew. If a cucumber leaves turn white, you will have to spray them with special solutions, which you will find in the garden shop.
The leaves of the cucumbers turn white, and it is on them that a white bloom appears, most likely due to the defeat of the plant with powdery mildew. Leaves are affected mainly if cucumbers are plentifully watered. Or when cucumbers are planted too thick, and just airing is not enough for them.
To get rid of this disease, cucumbers can be sprayed with a solution of ferrous sulfate, or a decoction of horsetail.
And for prevention, cucumbers should not be planted for many years in the same place, since the causative agents of this disease remain in the soil and will accumulate.
When the leaves of cucumbers turn white, this means that the plant is ill with powdery mildew (downy mildew) and a frequent cause of this disease is a sharp temperature drop.
Even if there are no sharp changes in climatic temperatures, watering cucumbers with cold water during hot weather necessarily causes such a disease as powdery mildew.
Therefore, water for irrigation must be collected in advance, so that she has time to warm up in the evening when watering is performed.
Most likely it is powdery mildew-watch the video, they tell how to deal with various diseases of cucumbers, including with this.
White leaves on cucumbers are the first sign that powdery mildew affected... By its nature, this disease is fungal, that is, its appearance is facilitated by an excess of moisture and an uncomfortable temperature. Experienced gardeners advise in such cases to adhere to the principles of regular crop rotation, then the network does not plant cucumbers in one place for many years in a row, but alternate with other crops after 2-3 years.
Affected plants can be treated with a solution of potassium permanganate - 1 teaspoon of powder per 10 liters of water. In addition, you can use factory preparations: Topaz, Fitoverm, Tilt and many others.
This disease is called powdery mildew, a fungal disease.
At first, the white spot is small, and then it grows and the spots become many. And then the leaf turns white completely and it seems as if sprinkled with flour. If the cucumbers have already appeared, and then the leaves have turned white, the cucumbers will be very tasteless.
The diseased plant is desirable to completely destroy, burn.
Most likely there may be a disease such as powdery mildew. It is caused by a fungal pathogen. But the reasons for the whitening of leaves will be blinking and others ..
For example mite or lack of nutrients in the soil.