Ask an expert to give some information about what diseases leeks can produce and how pesticides can

Let me tell you what kind of disease leeks have.

Leek stem blight.

Botrytis cinerea.

Leek blight. Leek cotton blight.

Sclerotinia sclerotinia sclerotinia in leeks.

Leek rust. Leek white silk disease.

Leek yellow leaf disease.

Leek fungus bud rot.

Leek soft rot.

Leek wilting virus disease.

Leek virus disease.

Leek physiological yellow leaf and dry tip disease.

If you need the prevention of any disease and **, give me a hint and I'll send you an encyclopedia.

1.Reasonable combination of pesticides, do not unscientific random matching.

2.Before spraying, dissolve the pesticide with a vial, and then pour it into a sprayer containing one-third of the water, shake it evenly, and then spray, otherwise it is easy to cause pesticide damage.

3.When spraying pesticides, they should be sprayed evenly, and should not be sprayed repeatedly because of serious diseases, otherwise pesticide damage will easily occur.

4.The temperature should be appropriate when spraying, and it is easy to cause pesticide damage when spraying at high temperature, so it is recommended to spray at about 10 o'clock in the morning or after three o'clock in the afternoon.

The following points should be paid attention to when using herbicides in leek fields: Before sowing or before sowing and before seedling, a contact herbicide 20% paraquat can be used, 150-250 grams per mu, 50-70 liters of water are added, and evenly sprayed on the ground, the weeding effect is significant, and if it is used after the emergence of leeks, it will cause pesticide damage. It can also be used to treat the soil with 100 grams of 50% promethofen per mu; 33% weeding can be used for weeding at the seedling stage, 150 grams per mu, no less than 50 liters of water, evenly sprayed on the furrow surface, and 48% fluoralin can also be used to use 150-200 grams per mu. After each stubble of old root leeks is harvested, remove the weeds in the field, after the wound heals, water it once, and then spray it, generally use it twice a year, and use 170 grams of 33% weeding per mu each time.

When using drugs when leeks have insect infestations, it is necessary to choose special drugs for leeks and spray them at a suitable time period, so that they can not harm the leeks and remove insect pests.

We can use a small watering can to spray leeks with pesticides, and when spraying pesticides, we must dilute the pesticides, and do not water them within two days after spraying pesticides.

Summary. Hello, you can use methyl toludamine 800-1000 times liquid, spraying the temperature should be appropriate, high temperature spraying is easy to cause pesticide damage, it is recommended to spray around 10 o'clock in the morning or after three o'clock in the afternoon.

What pesticides are used for leeks that do not grow well? What fertilizer to sprinkle.

Hello, you can use methyl toluminemine 800-1000 times liquid, spraying the temperature should be appropriate, high temperature spraying is easy to cause pesticide damage, it is recommended to spray after 10 o'clock in the morning or after three o'clock in the afternoon.

The organic matter content of cow manure is low, the fertilizer efficiency is slow, although the nutrients of chicken Nian Yanfeng manure are the highest, but the insufficient chicken manure contains a lot of insect eggs, which is very tolerant of jujube cavity and easy to provoke underground pests. Although pig manure is a well-balanced manure, its efficacy is far inferior to sheep manure.

First of all, some pesticide residues are volatile, so they need to be placed in a ventilated place for 1-2 days before eating after buying fresh leeks.

Secondly, soak for a period of time before eating, and add an appropriate amount of baking soda to the water when soaking. Because leeks generally use organophosphorus pesticides, one of the characteristics of organophosphorus pesticides is that they are inactivated when exposed to alkali. Or add appropriate edible salt, because the soaking of brine can cause leek cells to precipitate pesticide residues due to shrinkage and water loss.

Soak the leeks and pat them next to them, and then wash them with water before eating.

Third, cut off the leek root about a centimeter in length before eating it closed. Because pesticides must be applied to the roots of leeks to remove pests, the pesticide residues in the roots of leeks are the largest, so it is better to remove pesticide residues by cutting off part of the leek roots when eating.

The method of using high temperature prevention and control method, plastic film covering method, and sprinkling plant ash is clear to many farmers who make leeks, and plant ash is omnipotent.

Leeks are planted in a fixed place, can grow for many years, the soil environment foundation is good, conducive to the subsequent long-term growth; Vegetables that have been planted in the previous crop are lily plants like leeks or cruciferous vegetables such as cabbage and mustard that have obvious pests such as aphids, cabbage, greenworms, etc., have a high chance of breeding diseases and pests, so it is not recommended to plant leeks in that place.

Some could be used. Use some other vegetables for control, and you can also do it through same-sex rejection**.

Generally speaking, the pesticide residues of leafy vegetables such as leeks, cabbage, bok choy, spinach, and water spinach are relatively large.

Leeks, in particular, are very susceptible to leeks and maggots, which tend to grow at the roots of leeks and are difficult to kill. Vegetable farmers sometimes use large doses of pesticides, or even highly toxic and high-residue organophosphorus pesticides to repeatedly "irrigate the roots" to achieve the effect of insecticide. At the same time, because leeks are crops that are harvested continuously, farmers are often busy harvesting and marketing in order to ensure the freshness of the vegetables and wait for the safe interval of residual pesticides to pass.

These are the reasons for the serious problem of pesticide residues in leeks. The more highly toxic pesticides are applied, the better the leeks will grow, the leaves will be green and oily, and they will look very beautiful, beware of being deceived.

All of them should be washed with warm water 2-3 times, then properly soaked, then cleaned, and finally cooked, so that 80%-90% of the residual pesticides on the surface can be removed, and its nutrients will not be destroyed. For pesticides absorbed by vegetables, it is difficult to wash them off, so you can only extend the time appropriately during cooking, so that the cooking temperature is higher and the residue is minimized. In addition, the newly bought vegetables are left for a day or two before eating, which will also be conducive to the degradation of pesticides.

In this way, it is contrary to the vegetables to eat fresh. There are always a lot of contradictions between things!

After being cleaned, it can be eaten for a long time, after all, the nutritional value of leeks is very high.

Knowing that there are many pesticides, and you still eat them for a long time, it's not that you can't get along with yourself, how can anyone do this!

In fact, it is not true, in the past, in the north, leeks were mainly used to prevent maggots, and DDT was used, but now it seems that there are not many medicines.

In the south, it seems that there is not a lot of medicine, I grow a little and eat it myself, so I never use medicine, as if there are no insects and no diseases.

If you are not at ease, you can wash more.

If you like to eat, you can bubble more in the running water.

Spring is a good time to eat leeks. Leeks are spicy in taste, rich in nutrients, and have certain medicinal effects. The sulfide in leeks has the effects of lowering blood lipids, increasing appetite, dehumidifying and regulating blood.

Recent tests have found that leeks are vegetables with relatively high organophosphorus pesticide residues, and a large number of pesticides will cause neurological disorders after entering the human body, and poisoned people will have symptoms such as excessive sweating and speech disorders.

In life, not only leeks will have pesticide residues, everyone has always believed that its serious residues are affected by its growth characteristics, mainly related to the insect pest of leeks - leek maggots. "Leek maggot, the common name for the leek-eyed mushroom mosquito, is the main pest of leeks. It is mainly harmed by the larvae that gather in the bulbs and tender stems of the underground.

After leek damage, the above-ground leaves are thin, yellow, wilted, broken, rotten or die in patches. The roots of leeks are where the most pesticide residues are located. Because the leek maggot is hidden in the soil, it must be sprayed with a large number of highly toxic pesticides, and the pesticides sprayed generally are ineffective against this pest, and the pesticide must be applied to the ground and irrigated on the roots of the leeks in order to effectively remove the leek maggots.

Even so, as long as you master the scientific identification method, you can eat leeks with confidence. In order to avoid uncomfortable symptoms, you should buy as little as possible and eat less to reduce the possibility of being attacked by pesticides. First of all, be sure to cut off the roots at least half an inch or more when eating.

Secondly, when picking leeks, you should "observe the words and colors": look at the color, don't pick the ones that look particularly green; Second, look at the head, don't pick a particularly stout one; Third, look at the leaves, don't pick particularly thick ones. Finally, try to soak leeks in lightly salted water for more than half a day before eating them.

Because the pesticides currently used are organophosphorus, which can be dissolved in water, after buying back leeks, soak them in water, and wash them with more water, which can reduce the pesticide residues.

Rest assured to eat, now the high-efficiency, low-toxicity and low-residue pesticides are many times better than the previous high-toxicity and high-residue pesticides.

You don't need to hit this, it seems that there are no worms to eat leeks, and it is best to eat after the rain if you have been drugged.

Basically, soak in water for 10 minutes.