How to grow sweet potato sweet potato control Wang what medicine is best

Sweet potato is a common ingredient in our life, and it is distributed in many parts of our country at present. Sweet potatoes are very popular because of their high edible value. Now many people start to grow it, but before planting, most people must want to have a comprehensive understanding of its planting method.

How to grow sweet potatoes

1. Seed selection. Although the planting of sweet potato looks simple, selecting good seeds is not only the basic condition for high yield of sweet potato, but also the basic requirement for it to take root and sprout. When selecting seeds, we usually choose larger sweet potatoes. First of all, we will observe whether there are any defects in sweet potato seeds, or where they have been bitten by insects and mice. If not, we will continue to see whether there are many bud points in sweet potatoes. Vitality is not exuberant, so it's basically fine.

2. Sowing seeds. When sowing, soak the sweet potato in multi-fungus solution for more than 10 minutes, which can effectively prevent some diseases, and at the same time, it can also prevent the seed potato from being eaten by mice before it germinates, and then sow. When sowing, we have to distinguish between the head and the tail, otherwise the seedlings can not grow out, if it is really indistinguishable, it can be slanted, and finally, the potato is covered with a layer of withered grass and rotten wood. Then cover it with a thin layer of soil, and if we are afraid that the temperature does not meet the requirements, we can cover it with a film. When the sweet potato seedlings grow out of 30 to 40 centimeters, we will cut them off, and then cut them into small nodes with three leaves, which can be cut at an interval of about 30 centimeters per plant.

3. Fertilization. The first fertilization is needed after planting. The main purpose of this fertilization is to let the cuttage sweet potato seedlings grow new roots, so it is generally the application of human feces and urine water. The second fertilization is after the sweet potato survives. Because the growth is different, it looks uneven. This time, it is mainly for the seedling, generally using urea, and the third fertilization is to lift the seedling fertilizer, which is also urea, but it needs to add some compound fertilizer. Finally, there is the most important strong fruit fertilizer, which generally uses potash and boron fertilizer.

4. Shunmiao. In order to facilitate the follow-up harvest and make unnecessary branches and leaves consume nutrients, we have to smooth the sweet potato seedlings in the field, sort out the sweet potato vines in the field in one direction and let them grow in one direction, so that there will be a lot of aspects when harvesting at that time. Secondly, just take off some extra branches and leaves in the seedling.

What is the best medicine for controlling the prosperity of sweet potatoes?

There are many drugs for controlling prosperity of sweet potato, and the general efficacy is very good, such as: Yijianning controlling Wang preparation, spraying Bei Duofeng and so on.

When is the best time for sweet potato to control its growth?

The first time to control prosperity: in the first expansion period of sweet potato, the vine is about 35-45 cm long, and the potato vine has begun to hang down from the ridge, commonly known as "Xialiangzi", elegantly known as "two ridges like holding hands rather than holding hands". At this time is the sweet potato branch tuber formation period, aboveground branches, underground tuber block formation, so it is very critical.

The second time to control prosperity: it is generally about 70 days after planting, when it is entering the "rainy season", with high temperature and high humidity. It is the fastest growing season for sweet potato stems and leaves, and it is in the common period of sweet potato vines, but the tuber expands slowly, so it should be re-controlled at this time.

The third time to control prosperity: generally, about 85 seconds after planting, when the stem and leaf growth of sweet potato reaches its peak, prepare for the arrival of the second expansion period of sweet potato, and control prosperity in time. In the second expansion period of sweet potato, the vine length is about 60-80 cm, and the ridge has basically been sealed. This is the golden period of sweet potato development, which should be re-controlled.

Common diseases of sweet potato and their control

Those that harm the growth of sweet potatoes are generally leaf rollers and aphids as well as grubs and voles. Leaf curlers and aphids generally harm sweet potato leaves and affect photosynthesis, while grubs and voles generally prefer to eat sweet potatoes in the field, and they will bite the sweet potatoes in the field one by one. Generally speaking, it is good to use trichlorfon solution to kill pests that harm branches and leaves, but it is not effective to spray and kill voles, so it is generally used to trap and kill voles' favorite food mixed with rodenticide in the field.

When planting sweet potatoes, we must pay attention to the selection work, and then sow seeds at the right time. The management of right and wrong after sowing is also very important. Good sweet potato needs to do a good job of prevention and control, which can be divided into three periods of time. Only by doing these well can we ensure the good growth of sweet potatoes.