What herbicide is better for weeding in soybean fields?

For chemical weeding of soybeans, it should be carried out cautiously to avoid unnecessary losses.

Spray at the right time to ensure that the amount of water is sufficient. Soybeans should not be sprayed immediately after sowing to prevent drought and other weather from affecting the efficacy, but not too late. The right way to do this is:

Plots with good moisture were sprayed 3-4 days after sowing, and plots with poor moisture were sprayed 4-5 days before seedling. Therefore, when applying pre-seedling weeding technology, it is necessary to pay attention to the sufficient amount of water. Take the air spray sprayer pulled by a small agricultural four-wheel tractor as an example, its bulk weight is 175-200 kg, equipped with a high-pressure nozzle, and the throttle in the second gear of the forward speed, so that each tank of liquid can be sprayed 6-7 mu to ensure that the water per mu is 30-35 kg.

At the same time, depending on the soil moisture and climatic conditions, water can be sprayed at any time, 20-30 kg per mu, to improve the efficacy.

Adapt measures to local conditions and select drugs accurately. The herbicide should be selected as a pre-bud herbicide, which has a short residual effect period and is safe for stubble, so it is the preferred agent. After soybean sowing, pre-emergence chemical weeding can not be selected, such as Kekole, Jingcao gram, 2,4-d, etc.

Strict standards, scientific mixing of liquid medicine. The formula of pre-seedling chemical weeding after soybean sowing is: 70 ml of 48% pyrin EC + 100 ml of 59% acetochlor EC + 2 grams of 70% soybean sulfuron soluble powder, 30 kg of water, which can be sprayed on one acre of land.

When preparing mixed pesticides, first add pesticides into the appliance according to the standard, and then dilute the powder pesticide with a little water into the mother liquor and then add it to the appliance, and finally add quantitative water.

Essay**.

Find a special herbicide for broadleaves.

1.Wild beans in soybean fields can be removed with acetochlor, which is sprayed with about 2-4 leaves when the wild beans are just emerging. However, it is generally not recommended to kill wild beans with drugs, as both beans and soybeans belong to the legume family and are resistant to soybean herbicides.

If wild soybeans are forcibly killed with strong herbicides, they can also harm soybeans. Therefore, even if acetochlor can be used to kill wild soybeans, it is important to pay attention to the dosage.

2.If the number of wild beans in the soybean field is small, it can be pulled out manually. Manual picking can effectively avoid damage to soybeans, but it is limited to small soybean fields, and it is not recommended to use this method for large soybean fields because the labor cost will be higher.

3.Generally, in the process of using herbicides, some chemicals can be appropriately added to improve the efficacy of the herbicide, so as to facilitate better control of wild soybeans. But be sure to pay attention to the dosage and avoid drug damage.

2.Are wild beans poisonous?

1.Are wild beans poisonous?

Normally, most wild beans are non-toxic, but it depends on the type of wild bean that is poisonous. For example, croton is poisonous and cannot be eaten.

2.How to eat soybeans.

1) Prepare the ingredients.

50g of soybeans, 1000ml of water, 70g of sugar, 300g of pure milk, 1g of yogurt baking powder.

2) Steps. Wash the soybeans first, add water, then beat the soy milk with a wall breaker, and add sugar while hot.

Filter out 700g of soybean milk, cool until it is not hot, then add pure milk and yogurt baking powder, and gently stir with a spoon in the same direction to evenly distribute the baking powder in the mixed solution.

Put the mixed liquid in a yogurt maker, take a warm bath, and let it ferment for 8 hours. Once the fermentation is over, it is ready to eat.

If there are wild soybeans in the soybean field, try not to use herbicides, because wild beans and soybeans are leguminous crops, and have a certain resistance to soybean herbicides. <>

How to spray wild beans in soybean fields:

1. If you must use the agent, you should choose the one that is as milder as possible, because the medicine is too strong will lead to the death of soybeans, pay attention to the timing of the drug, for example, you can use acetochlor, in the wild soybean just emerged, about 2-4 leaf stage, the spray can play a certain inhibitory effect.

2. In the process of using herbicides, some pesticides can be appropriately added to improve the efficacy, so as to better control wild soybeans, but pay attention to the amount of use, too much use will produce certain pesticide damage.

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Extended Materials. There are two methods of chemical weeding in soybean fields.

Pre-seedling weeding: When the soil moisture is good, it can be closed before the soybean is sown before arching the soil. Use 50% acetochlor EC 200 300 ml, or 90% Hoenais 100 1 500 ml plus 70% Saikezine wettable powder 20 40 grams per mu, or add 2 3 grams of thiensulfuron, or add 2 grams of 75% Baoshou dry suspension, or add 50 100 ml of 48% Guangfen emulsifiable concentrate, or add 72% 2,4D butyl 65 100 ml, and spray 30 kg of water on the soil.

Post-emergence weeding: After emergence, control is carried out at the soybean 1 3 compound leaves and weeds 2 5 leaf stages. To control gramineous weeds, use 60 100 ml of 5% quinoxalin EC per mu, or 50 65 ml of 15% pyrofluoxalin EC, or 30 ml of high-efficiency pyrochloroxalin EC, or 50 60 ml of Weiba concentrated emulsion, or 80 100 ml of Napjan EC, and spray 20 30 kg of water.

To control broad-leaved weeds, use 4 6 ml of 25% Huwei, Longwei, sulfafen and other water agents per mu, or 8 ml of 44% gram of chlorinary water, or 4 6 ml of 24% weed incineration agent, and spray 2 kg of water.

Note: What is soybean compound leaf, that is, there are three leaves on the petiole is counted as a compound leaf, and soybean is called three compound leaves when it reaches three such compound leaves! The time of use of herbicides on soybeans is also very important, and herbicides should not be applied after heavy rain or when there is a lot of dew.

What herbicide is used for wild rape in wheat fields? Wheat fields choose herbicides based on grasses. The main components of broadleaf grass are: benzsulfuron, benzylsulfuron, ethylcarboxyfluorfen, thiensulfuron, chlorofluoropyroxyacetic acid, zooxazone, pyrsulfam, diflusulfam, dimethyltetrachlor, etc.

The main components of grass grass are, oxazole chlorafen, alkynyl ester, methyl disulfuron, fluzosulfuron, etc.

Soybean post-emergence weeding is the continuation and development of pre-emergence weeding. It has the characteristics of high grass killing rate, energy saving, easy to use, strong safety, and little impact on crops. Commonly used post-emergence chemical herbicides include Gai Cao Neng, Steady Killing, Na Yujing, Huwei, Hecaoke, Bendasone, etc. （

Acetochlor (50% acetochlor, 90% acetochlor, 90% Saintnong, 90% Hoenais).

Acetochlor is generally used as a soil treatment and can be used before sowing or before seedling. It is best to apply the pesticide after sowing and before seedlings emerge after sowing. It should be noted that the application of pesticides in the soybean arch stage will cause pesticide damage, especially in the case of mixing with the pesticides to control broad-leaved weeds, the application of pesticides in the soybean arch stage may cause a reduction in yield.

The dosage of soil sealing herbicides should be adjusted according to the soil type and organic matter content.

Chlorsulfuron (beancholong, beancholon).

Chlorsulfuron can be used in soybean before and after seedlings, but it is easy to cause pesticide damage after seedlings, and its use is generally not recommended. It is usually used for soybean post-sowing pre-emergence soil treatment, 3-5 days before emergence of soybean sowing with 60-75 grams of 20% chlorsulfuron-methyl per hectare. Chlorsulfuron is mainly used in soybean fields to control broad-leaved weeds, and can control weeds such as Xanthium, wolfba, weasel petals, fragrant herbs, hemp, knotweed, quinoa, etc., and has inhibitory effects on thistle, horsetail, curly stem knotweed and grass weeds, and has poor efficacy on chickweed, duck plantar and nightshade.

Azinone (Cyclix, methazine).

Azinone is generally treated with soil 3 to 5 days after soybean sowing and before emergence. Azinone mainly controls a variety of broad-leaved weeds such as amaranth, wolfweed, quinoa, knotweed, chickweed, and Xanthium.

Alien grass pine (Guang extinguishing spirit, Tian Deji, bean grass spirit).

It can be used for soybean sowing and pre-emergence closure and weeding, and can also be used for early post-emergence stem and leaf treatment. It can control annual grasses and broad-leaved weeds such as barnyard grass, dogtail grass, horsetail, golden dogtail grass, nightshade, fragrant root, water acanthus, purslane, hemp, wild watermelon seedlings, quinoa, knotweed, Xanthium, wolfgrass and other annual grasses and broad-leaved weeds, and has a certain inhibitory effect on perennial weeds such as small thistle, large thistle, endive and horsetail.

Glyphosate (Roundup, Koringa, Haolida, Farmer's Le).

It is suitable for the control of early spring weeds in newly opened wasteland and other plots with many perennial weeds. After the weeds are full, soybean spraying 2 3 days before the emergence of glyphosate can control the perennial weeds that have been unearthed, which can not only achieve the purpose of effective weed control, but also has a strong systemic conduction effect, which can kill the underground part of the plant, thereby reducing the harm of the second year.

Post-emergence herbicides must be treated with special herbicides, and there can be no sloppiness. You can go to the pesticide store to inquire and buy.

After the emergence of soybeans, it is time to weed, remember these 2 points when weeding, there are no weeds that cannot be removed.

1.Sulfafen. Also known as Huwei, it is a post-seedling herbicide in soybean fields, preventing and controlling broad-leaved weeds, and annual and perennial broad-leaved weeds such as duck plantar grass, small fruit grass, red knotweed, wolf grass, cyst sunflower, ear grass, and field spinning flower.

The dosage to be used is: 250 g of sulfafen aqueous agent per hectare.

2.Refined and cautious. It is a systemic herbicide, with high activity and rapid efficacy, and has a good control effect on most annual grasses at very low concentrations.

It can prevent and remove annual grasses such as Mai Niang, Ma Tang, Barnyard Grass, Dogtail Grass, and Wild Oats. The dosage is: 5% quinoxalin EC 450 900 ml per hectare.

3.High-efficiency flupyramethoxalin. It is also known as high-efficiency grass covering, the number of internal rounds is strong, it can be absorbed by weeds for a long time, the activity is high, the efficacy is rapid, and it has a good control effect on most of the annual and perennial grass weeds.

It also has a good control effect on perennial stubborn grasses such as reeds and white grasses. The dosage used is: 450 900 ml per hectare of high-potency flupyramethoxalin EC.

4.Cletholate. It is a systemic herbicide with high activity and rapid efficacy, and has a good control effect on most annual gramineous weeds at very low concentrations.

It can prevent and remove annual grass weeds such as Mai Niang, early maturing grass, stick head grass, dog tail grass, barnyard grass, and horse tang. The dosage used is: 12% cletholate EC 375 525 ml per hectare.

5.Essence pyroxalycephalin. It is a systemic herbicide, with high activity, rapid efficacy, and good control effect on gramineous weeds.

It can prevent and remove annual grass weeds such as Mai Niang, barnyard grass, dogtail grass, and Ma Tang. The dosage is: 10% emulsifiable concentrate 450 675 ml per hectare.

Sulfafen.

The main product is 250 grams of liters, 25% water, which can be compounded with quinoxalin, isoxafen, herbicidal pine, etc., flusulfafen is also known as Huwei, which is the trade name of 250g l fluorosulfonate simple amine aqueous agent launched by Syngenta, which is well-known because of its great influence. Sulfafen is also a diphenyl ether herbicide developed by Syngenta, which is mainly used to control broadleaf weeds after soybean sprouts; Its mechanism of action is through leaf absorption, which destroys the photosynthetic vertical spine. Sulfafen is used in the true leaf stage of soybean seedlings to the stage of one compound leaf, and the dosage is too large or the soybean is easy to cause pesticide damage after flowering.

Kill steadily. It belongs to the post-seedling selective stem and leaf treatment herbicide, which can be used for a variety of broad-leaved crops, and has a special effect on weed control, and the specific dosage is: to control 2 3 leaf stage annual grass weeds, 500 750 ml per hectare with 15% precision killing; control 4 5 leaf stage, with 750 1000 ml per hectare; For the control of 5 6 leaf stage, use 1000 1200 ml per hectare.

Herbicides should not be used in the late stage of the soybean field.

Soybean weeding methods and precautions:

1. Soybean weeding method.

Perennial weeds such as thorny vegetables, chicory and reeds are common weeds in soybean fields. They have strong rhizome reproduction, deep roots, and strong resistance to chemicals tung bases. Therefore, if chemical reagents are used for weeding, the dose should be increased.

It is also prone to cause plant fluid toxicity and affect production. So, in this case, glyphosate solution can be used to prevent these perennial malignant weeds and is more effective. Weeding can also be done before seedlings and weeds are removed before soybeans arch.

2. Precautions for weeding.

1.Strict standards of scientific formula liquid.

When formulating pesticides, pesticides should be added to the equipment according to the standard. The powdered pesticide is then diluted with a small amount of water to form the mother liquor, which is then added to the device. Add a dosing amount of water.

Do not add water to the appliance before adding liquids to prevent water medicine. Insufficient dissolution and uneven spraying, poor effect.

2. Accurately select drugs according to local conditions.

Herbicides should be chosen as pre-emergence herbicides. Chlorpyrifos has a short residual period and is safe for sputum. This is a good ** person. Chemical weeding of soybeans after sowing is not selective, such as kekuole, jinghecao, 2,4-d, etc.

3.Spray at the right time.

Soybeans should not be sprayed immediately after spraying to prevent weather such as drought from affecting the efficacy of the drug, but not too late. The right preparation is to spray the drug 3-4 days after sowing in the plots that feel good, but in places that are not satisfied. The block is sprayed at the end of 4-5 days before the emergence of seedlings.

Therefore, before weeding at the seedling stage, we must make sure that there is enough water and ensure that the amount of water applied per mu is 30-35 kg. At the same time, according to the soil moisture and climatic conditions, the amount of water can be replenished at any time, 20-30 kg per mu to improve the effect. Fenghui.