What are some tips for sweet potato insect control? Which is better, rinse or dip?

In the prevention and control of virus diseases, the commonly used methods are as follows: the selection of detoxified seedlings, crop rotation, robust cultivation, pesticide control, etc., in production practice, all the best virus disease effect performance is very poor, therefore, sweet potato virus disease is focused on prevention, long holiday pests and diseases. Viral diseases, leaf spots.

Sweet potato blast sweet potato vine cutting disease, sweet potato soft rot, etc. To prevent pests and diseases of sweet potatoes, the first thing to do is to do it. Sterilization of the land before planting.

Remove all the land, hidden pests and diseases. This is very simple, it can be eaten, and it will cause a loss of production. In production, the following methods can be taken in time to prevent poisoning and improve the yield and quality.

1.During the rapid expansion of sweet potatoes, the roots are drenched once every 10 15 days with 25 30 times superphosphate mixed with dry and pure plant ash to leach the clarifying solution. In the early stage, the surface of the diseased potato will appear light brown or black-brown, irregular concave patches, and in the later stage, a black mold layer will be formed on the diseased spots, resulting in a bitter taste of the potato meat.

<> can be used on the basis of the selection of disease-free sweet potato seeds for reasonable crop rotation, with 50% carbendazim wettable powder 800 times liquid soaking. At the same time, the field management of sweet potatoes should be strengthened, and the cultivation and moisture conservation should be carried out appropriately, and the top dressing should be reasonable. If the disease is to be carried out in time, the prevention methods are, the seedlings are disinfected, and the seedlings are soaked in carbendazim or tobuzine solution for two hours before planting.

If the potato seedlings are sick, spray with chlorothalonil or tobuzin solution for control. Hollow worms generally occur in 2-3 generations a year in southern regions. Adults bite tender stems and petioles, and larvae enter the potato vines, except for the seedlings damaged from May to June, and August to October is the re-damage period.

The leaf curl insect on the back of the leaf is as follows: when the larvae have harmful signs, spray with 40% fast-acting phosphomilk 1500 to 2000 times spray to kill, you can achieve the effect of curing the eggs! Sweet potatoes should have a high yield, we all know that sweet potato vines can not grow vigorously, in order to control the growth of sweet potato vines before the emergence of vigorous growth, it is necessary to turn the vine and pick leaves after the sweet potato vines are sealed.

And when fertilizing, it is necessary to pay attention not to apply more nitrogen fertilizer.

The first point is that some pesticides should be sprayed, which is the most basic skill, the second point is that the grafting should be well reduced, which can prevent the harm of insects, and the third point should pay attention to climate changes, so that it can be well controlled.

Dipping the roots is a method of controlling underground pests in advance, and the seedlings are treated before planting, that is, the roots of the seedlings ready for transplanting are put into the medicinal solution, soaked for 3 5 minutes, and the base of the seedlings can be hung with the medicinal solution, and then the seedlings are planted. It can be used with imidacloprid, chlorpyrifos microcyst suspension agent and other agents to add water and a small amount of soil to prepare a root solution, which can also prevent underground pests.

For the insect control of sweet potatoes, you can spray some pesticides to prevent insect pests, but try to buy sweet potatoes, not buy large areas of grass, sweet potatoes, wheat and other mixed use. The effect of rinsing is better than that of dipping the root.

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.

There are two techniques for sweet potato insect control, the first is flushing, the second is dipping the roots, if it were me, I would choose to flush the pesticides, and by sprinkling pesticides on the soil, it can also effectively prevent underground pests, and it can also be effective in preventing insects.

For the problem of sweet potato insect control, I will choose to rush to apply insect control, dipping roots to prevent insects can only be used in a short period of time, in the early stage, in the area of low insect resistance, although the early stage is for preventing the roots from being bitten, but the later effect is not large. Compared with flushing, it can effectively prevent insect infestation for a long time.

Mainly soil insecticide and root insecticide, I will choose root insecticide, because it lasts for a long time, the effect is better and the pesticide residue is less, but also can promote the seedlings to grow more roots, which is conducive to plant growth.

Spray some pesticides in time, so that you can achieve the effect of insect control. I would choose to dip the root this way.