Potato sunburn is not terrible, terrible is the ring rot (with ring rot prevention methods)
For the big potato growers, you may encounter such problems. The potato has grown well in the past few days. The scorpion is particularly strong, but suddenly it becomes the following picture. What are the leaves? Is it a disease? Still something else? Is there any way to recover? Let's take a look at it with Xiaobian.
It is not difficult to see from the picture, this is the physiological disease of the potato "Sunburn", why do you say that? Before the occurrence of sunburn, there were several phenomena, sudden, wide range, almost at the same time. 3 days before the onset, the weather was cloudy and the temperature was moderate. On the day of the disease, the temperature suddenly increased and the light became strong. The maximum temperature at noon reached 38 °C. In the early stage of the disease, the leaves are chlorotic from the edges, which are hot and hot, and curl upwards; soon, the leaves that are curled after the light appear dry and fall off.
Therefore, in the case of sudden weather and sudden increase in temperature, the stomatal opening and closing of the original potato leaves is broken, and the transpiration of the leaf cells is increased due to the enhanced illumination and temperature, and the transpiration force of the leaves is increased. When the transpiration of the leaves is greater than the water absorption of the roots, the leaves will close the pores due to the self-protection consciousness; and as the pores are closed, the temperature of the leaves rises, and the direct sunlight from the outside further aggravates the blade burns, resulting in The occurrence of sunburn.
Think about it yourself, with this kind of imagination, what should you do if you deal with these physiological diseases?
In fact, this kind of physiological disease, especially the leaves that have appeared dry, do not have to worry too much, the most effective relief is rainfall, do not deliberately take remedial measures, according to the normal medication plan can be used. In fact, compared to the sunburn, everyone should pay more attention to the hazards of the ring rot.
Roasted potato ring rot
Potato ring rot, a typical bacterial disease, can occur throughout the growing season and storage period of the potato. The types of the disease are mainly divided into three types, the plaque type, the wilting type, and the tuber type. Let's analyze it for you!
The first type, the plaque type: is common on the top of the compound leaf at the base of the plant. The tip, leaf margin and vein are green, the mesophyll is gray-green, with obvious mottled, dry tip or inner longitudinal volume. Expanding from the bottom up, and finally the whole plant died;
The second type, wilting type: initial wilting from the top compound leaf, the edge of the leaf is rolled, the symptoms are similar to water shortage or sunburn, the disease spreads from top to bottom, the whole plant leaves chlorotic, the inner roll hangs down, and finally collapses and dies. .
The third type, the incidence of tubers: the tuber is cut, and the vascular bundle becomes milky yellow or dark brown, and a ring-shaped bad color appears in the cortex. When squeezed by hand, white pus will appear, and the potato and cortex will separate.
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