Generally speaking, farmers’ friends have sprayed a lot of pesticides. If they say that the vegetable growers will not spray drugs, he may be anxious with you, but in fact, there are many people who can really apply scientific pesticides. The relevant questions on the method are introduced to you.
First, the timing of spraying. In the grassroots work, I often see that farmers are used to spraying medicine for three or four days, thinking that this can be safe and worry-free. In fact, this method is very wrong, not only the cost is increased, but also the drug is particularly easy to cause pests. The rapid increase in drug resistance is uncontrollable when it occurs. A reasonable method is to use the drug at the beginning of the pest, and the disease is recommended to spray a protective fungicide on a regular basis. At the beginning of the disease, a symptomatic therapeutic fungicide is taken according to the type of the disease.
Second, the amount of liquid spray is not as good as possible. Usually, there are often vegetable farmers who ask me to spray a few barrels of water when spraying. In fact, this is a problem that cannot be answered. The most reasonable amount of liquid spray when spraying is to spray the leaves to the surface and it is just the best. Good, scientific experiments have shown that if the amount of liquid remaining on the leaves after spraying the leaves is only about half of that when the liquid drops on the leaves, it will not only cause a lot of waste when spraying the dripping, but also the actual control effect. Also greatly discounted. Some vegetable farmers are accustomed to spraying liquids very little, and the concentration of drugs is very high. This is also unscientific, because it is not only prone to phytotoxicity, but also the phenomenon of leakage is serious, the target is not sprayed, and the control effect is not satisfactory.
Third, the spray control object is different, the spray position is different. If spraying drugs to control pests such as thrips, mites, and whitefly, focus on the young or middle part of the plant. If the general disease is controlled, focus on spraying the old leaves that are easy to be affected in the middle and lower parts. For diseases such as disease, blight, and blight, the base of the stem should be sprayed with emphasis.
Fourth, the preparation of liquid: When using the pharmaceutical liquid, it is recommended that you use the second dilution method, that is, first dissolve the pesticide in a small amount of water, and then fill it with water evenly, so that the agent can be dissolved more uniformly in water, and the effect is better.
V. Mixing order of pesticides: If a variety of pesticides are sprayed at one time, such as insecticides, fungicides, foliar fertilizers, etc., we must remember that when adding pharmaceutical liquids, we must first add foliar fertilizer, plus A bactericidal or insecticide in the form of a powder, and finally an emulsifiable pesticide. In this order, the efficacy of the drug is less affected, and conversely, it may have a great impact or even failure on the effects of various pesticides.
6. Spraying method: If using a manual sprayer, it is best to spray against the blade. If it is a mister or a high-pressure electric sprayer, it should be sprayed parallel to the top of the plant. If it is sprayed on the plant, it will instead There are a lot of liquids sprayed onto the ground, causing waste. Spraying insecticides and bactericides is generally a person standing on the upper air vent, spraying the front side or just spraying the left or right side, and spraying the herbicide, especially the ground-sealed herbicide, is generally a reverse spray to destroy the film.
First, the timing of spraying. In the grassroots work, I often see that farmers are used to spraying medicine for three or four days, thinking that this can be safe and worry-free. In fact, this method is very wrong, not only the cost is increased, but also the drug is particularly easy to cause pests. The rapid increase in drug resistance is uncontrollable when it occurs. A reasonable method is to use the drug at the beginning of the pest, and the disease is recommended to spray a protective fungicide on a regular basis. At the beginning of the disease, a symptomatic therapeutic fungicide is taken according to the type of the disease.
Second, the amount of liquid spray is not as good as possible. Usually, there are often vegetable farmers who ask me to spray a few barrels of water when spraying. In fact, this is a problem that cannot be answered. The most reasonable amount of liquid spray when spraying is to spray the leaves to the surface and it is just the best. Good, scientific experiments have shown that if the amount of liquid remaining on the leaves after spraying the leaves is only about half of that when the liquid drops on the leaves, it will not only cause a lot of waste when spraying the dripping, but also the actual control effect. Also greatly discounted. Some vegetable farmers are accustomed to spraying liquids very little, and the concentration of drugs is very high. This is also unscientific, because it is not only prone to phytotoxicity, but also the phenomenon of leakage is serious, the target is not sprayed, and the control effect is not satisfactory.
Third, the spray control object is different, the spray position is different. If spraying drugs to control pests such as thrips, mites, and whitefly, focus on the young or middle part of the plant. If the general disease is controlled, focus on spraying the old leaves that are easy to be affected in the middle and lower parts. For diseases such as disease, blight, and blight, the base of the stem should be sprayed with emphasis.
Fourth, the preparation of liquid: When using the pharmaceutical liquid, it is recommended that you use the second dilution method, that is, first dissolve the pesticide in a small amount of water, and then fill it with water evenly, so that the agent can be dissolved more uniformly in water, and the effect is better.
V. Mixing order of pesticides: If a variety of pesticides are sprayed at one time, such as insecticides, fungicides, foliar fertilizers, etc., we must remember that when adding pharmaceutical liquids, we must first add foliar fertilizer, plus A bactericidal or insecticide in the form of a powder, and finally an emulsifiable pesticide. In this order, the efficacy of the drug is less affected, and conversely, it may have a great impact or even failure on the effects of various pesticides.
6. Spraying method: If using a manual sprayer, it is best to spray against the blade. If it is a mister or a high-pressure electric sprayer, it should be sprayed parallel to the top of the plant. If it is sprayed on the plant, it will instead There are a lot of liquids sprayed onto the ground, causing waste. Spraying insecticides and bactericides is generally a person standing on the upper air vent, spraying the front side or just spraying the left or right side, and spraying the herbicide, especially the ground-sealed herbicide, is generally a reverse spray to destroy the film.
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