In the process of planting sweet potatoes, how to take measures to prevent the occurrence of various

It is necessary to observe whether there is any lesion on the appearance of sweet potatoes, spray pesticides in time, clean up weeds frequently, keep the nutrients of the soil from being lost, and do a good job in water and fertilizer management.

It is necessary to spray drugs in advance, do a good job in epidemic prevention, rotate crops with rice, and also choose better sweet potato seeds.

It is necessary to strictly quarantine the rice, carry out rice rotation, select some fine varieties, and remove some remnants from the fields.

The purpose of Wang control is to inhibit the nutrient consumption caused by the growth of aboveground stems and vines, and at the same time enhance the photosynthesis of leaves, promote the transfer of nutrients to underground tubers, and accelerate the expansion of tubers. In the end, it is said that turning the seedlings is not scientific, and the nutrients are wasted, so it is changed to lifting the seedlings, some people use the hook to grab the sweet potato seedlings and lift them up, and some people use long wooden poles or bamboo poles to poke the seedlings under the seedlings and lift them up, the purpose is to cut off the meristem under the seedlings and control the vigorous growth.

Do not apply nitrogen fertilizer. Because if you use nitrogen fertilizer, the vines of sweet potatoes will grow wildly, so it will be troublesome to control the prosperity again. And the quality of sweet potatoes with nitrogen fertilizer is not good, so if you grow sweet potatoes and eat them yourself, then add plant ash, such sweet potatoes are not only delicious, but also not vigorous.

It will also absorb most of the nutrients in the soil, so that the sweet potato tuber will be deficient in fertilizer, which will affect the growth of sweet potato tuber. The ultimate goal of the old farmers planting sweet potatoes is to hope that the roots will be fertile. Therefore, controlling the prosperity of sweet potatoes has become the key to increasing yield.

At this time, it is a critical period for the growth of sweet potatoes, and we must prepare in advance to control the prosperity. Once the sweet potato grows vigorously, it is necessary to take corresponding measures to control the prosperity in time, so as not to affect the normal growth in the later stage and adversely affect the development of the fruit.

But many sweet potato growers really to the sweet potato control stage began to be impatient, especially after the first spraying of pesticides can not see the expected effect of the second spraying in a hurry, and even some sweet potato growers in order to achieve the purpose of controlling the wang at will to increase the amount of pesticides to control the amount of people usually per mu 6000 10000 kg (a friend in Shandong said that there is a new variety of high-quality sweet potatoes in Shandong, without stringing any vines, the yield per mu can reach more than 20,000 catties). The yield of 1000 3000 catties per mu is not bad, and the quality of sweet potatoes is not good.

It should be properly drained, so that the soil of the sweet potato is a little drier, and the shade does not expose it to too much sun, and it can be properly sprayed with some drugs, and the leaves should not grow too much.

At this time, you can spray the growth control agent, you can also start the seedlings, you can also remove the stagnant water, increase the potassium fertilizer, and you can also lift the vine, and gently lift the sweet potato vine to prevent it from continuing to grow.

I think that in such a situation, we should give more water and apply more fertilizer, so that the sweet potatoes can grow bigger and the yield will be higher, which is also a good thing for farmers.

Sweet potatoes are divided into spring sweet potatoes and summer red imitation potatoes, we generally plant summer sweet potatoes after the summer wheat harvest, the sweet potatoes planted in summer because of the high temperature, rainfall, sweet potato vines will show signs of vigorous growth, so it is necessary to control the sweet potato vines to prevent sweet potato vines and tubers from competing for nutrients, so what measures are better for sweet potatoes to grow?

Although many people like to eat sweet potato leaves that have just grown in recent years, the effect of planting sweet potatoes is to harvest sweet potato roots, and eating sweet potato leaves is only secondary, so planting sweet potatoes should be dominated by the growth and development of sweet potato roots. If the growth of sweet potato vines is not manipulated in time, it will not only cause sweet potato vines and tubers to compete for nutrients, but also continue to cause poor ventilation and ventilation performance in the sweet potato field due to the mutual shielding of sweet potato branches, which can easily lead to the occurrence of pests and diseases.

Sweet potatoes are vine-growing crops, and many people don't know what kind of situation is that sweet potato vines are thriving, although it is important to understand that sweet potatoes are prosperous, but they are not clear when they will gradually control their prosperity. One of the main manifestations of sweet potato growth is that it is not clear to distinguish between the ridge top and the ditch, in our planting sweet potatoes here is mostly ridge planting, even if the sweet potato enters the rapid growth link, you can also see at a glance where is the ridge top, where is the ditch, if you still can't distinguish the ridge top and the ditch, it must be that the sweet potato vines have already been prepared to cultivate and grow, and you need to control the prosperity in time.

Sweet potato control can be divided into three times, the first control of the sweet potato vine will gradually control the peak after the sweet potato vine grows to 35-45 cm, at this time it also happens to be the case of sweet potato gradually set potato, the control of the wang can be sprayed with an appropriate amount of wang control agent, Zhongzheng can also use the form of vine to organize the rapid growth of sweet potato vines. The second time can be carried out in the rainy season, when not only the rapid growth of sweet potato vines, but also the rapid expansion of sweet potato roots, so at this time, the control of prosperity needs to be moderately heavier, and the dose can be moderately increased to prevent the growth of sweet potato vines. The last time the sweet potato tuber can be carried out when the sweet potato tuber expands for the second time, when the sweet potato vine can already be 60-80 cm long, because this is also the critical period for the growth and development of sweet potato roots, so it is also necessary to control the growth of some more.

The control of sweet potatoes should be based on the rise of sweet potato vines to make decisions, the above three times are only the time of most sweet potatoes to control the prosperity, and not necessarily the sweet potatoes are controlled according to this time when controlling the prosperity. Nowadays, there are many types of sweet potatoes, some sweet potato varieties are easy to grow vines, and some sweet potato species vines will grow weakly, plus the temperature and rainfall are different, the growth of sweet potato vines is not the same, so when controlling the sweet potato vines, you can control the prosperity according to the scientific research of the rise of sweet potato vines, and ensure early control and frequent control, so as to improve the quality and production of sweet potatoes.

Chemical control: use 90% dichloromethane solution 800 times, 50% photophosphorous emulsion solution 500 times, 8 10 days, 2 3 times continuous use. Mix fine sand with 50% octyl thiophos cream and 10x water to form toxic soil.

Scatter the soil along the ridge, then turn the shallow hoe to treat the soil, before the land preparation, 5% of the phosphine particles can be evenly spread on the ground, and then use a shallow hoe to evenly disperse the agent in the soil, which can kill underground pests.

However, with the use of high concentrations and high doses of pesticides, the contamination is very serious, and the pesticide residues are very high, so it is not recommended.