Causes and preventive measures of potato skin cracking

Potato is one of the favorite foods of many people, and it is also an important food and vegetable in our country. It is widely planted in the south of our country. People who have experience in growing potatoes may know that potatoes may crack when they are planted, so why do they crack? The pro-agricultural network will introduce it to you today.

I. the reasons for the cracking of potatoes

1. The sand and gravel content is too high

When the content of sand and gravel in the soil is too high, it is easy to scratch on the surface of potato tubers. Scratches will gradually deepen as the tuber expands, and to a certain extent, the epidermis will crack. In addition, when the temperature is high, after continuous drought, the rhizome is suddenly watered or encountered rainfall, the rhizome forms periderm during drought, the expansion rate is slow, the plant absorbs more water when it is wet, and the tuber expands quickly, so that the periderm is broken.

two。 Temperature effect

The suitable temperature for the formation and expansion of potato tuber is 15: 18 ℃. When the temperature is suitable, the potato tuber expands rapidly, but if it meets high temperature or cooling, the outer cell division rate of potato tuber slows down, while the inner cell of potato tuber is still in rapid division and growth, which makes the growth rate of potato tuber outer layer and inner layer unbalanced, which is easy to cause the phenomenon of epidermis cracking of potato tuber.

3. Pest influence

Potato nematode disease is also one of the main causes of epidermal cracking. The disease is caused by nematode infection and damage to the tuber. after the damage, the epidermis is brown and cracked, with punctate voids or heart-shaped inside. The symptoms of aboveground diseased plants are usually not obvious at the initial stage of damage, and the seedlings are slow and weak or the plants grow slowly and short, which is similar to the symptoms of lack of water and fertilizer. with the gradual aggravation of the damage, the diseased plants appeared small spots and expanded continuously. sometimes it shows wilting or premature death at noon.

Potato nematode can be transmitted through diseased seed potato, diseased soil, diseased fertilizer, water flow, daily farming operation and so on, that is, multiple cropping of potato will provide favorable conditions for nematode harm. however, in recent years, due to the limitations of traditional planting patterns and arable land, the multiple cropping index of potato is generally high, coupled with farmers' low awareness of potato nematode control, potato nematode spread rapidly.

II. Prevention and control measures of potato cracking

The prevention and control of potato cracking is mainly to do a good job of daily planting management of potatoes, including the choice of planting soil, maintaining a stable temperature and so on. For the prevention and control of potato nematodes, experts suggest that farmers should pay more attention to the prevention and control of nematodes. In addition to taking agricultural and physical control measures, it is also necessary to combine Yinghui nematicide to control the number of nematodes in soil. Among the Yinghui line killers, Ligan sand, Yinghui Express Line, Tiandi Line, Wireless and other products are available in granules and water, which are suitable for different growth stages of potatoes. Farmers can use Yinghui nematicide granule ditch application, hole application or whole field application before potato transplanting, and the duration is as long as 2-3 months. If the potato is harmed by nematode disease during the growing period, Yinghui nematicide can be used to irrigate the root and flush it with water.

The above are the causes of potato cracking and the relevant prevention and control measures introduced to you by the pro-agricultural network. The potato cracking phenomenon has greatly damaged the economic interests of farmers and has become a problem that has been perplexing many farmers for a long time. I hope this article can provide some help for the majority of potato farmers.