What pesticides are used for weeding in corn fields?

Nisulfuron should be used, or this pesticide can be mixed with the usual herbicide, it will have a good weeding effect and will not have any effect on other crops. Nicosulfuron + atrazine This combination is the best, the cost is very low, and the effect is very good.

We can use tobacco or oxazolone, which is now the safest herbicide, but the cost is relatively high.

You can choose some plant growth regulators, fungicides, and some insecticides, at this time, you need to prescribe the right medicine and choose the right pesticide according to different problems.

At this time, you should choose some herbicides with high efficacy, you can also choose biological herbicides, you must pay attention to the ingredients, that is, you should pay attention to the time of use, you should also pay attention to the way of use, you can also choose plant ash.

Personally, I think it's best to use a corn-specific herbicide, which has been specially developed for corn fields and does not cause pesticide damage.

The yield of corn has always been very good, so many areas in our country like to plant corn, in fact, in the process of corn planting, we also need to pay attention to the corn weeding and frying too vigorously will affect the growth of corn. Here it is:Sorted out several pharmaceutical preparations for weeding corn fields1. Powerful nitrate, smoke and herb suspension

The function of gunpowder smoke and suspension agent is very much, this herbicide is generally used when corn grows 3 5 leaves, and the weeds in the field are about 2 4 leaves, and we can evenly spray 200 grams of the drug with a concentration of about 28% per mu of farmland. This can be a good way to remove wild weeds such as dog tail grass, barnyard grass and iron amaranth, and it has many weeding functions.

Second, the most commonly used nicosulfuron.

Nicosulfuron is a corn herbicide that is very commonly used by farmers, and its formula is very common and has a good weeding effect. However, farmers need to pay attention to the amount of spraying of this herbicide when using it. Excessive spraying can also have a big impact on corn seedlings, but this herbicide is relatively safe and can be cleaned of weeds in about 20 days as long as the right amount is used.

3. The largest number of users of mesotrione.

This is a kind of herbicide formula that has been popular in various parts of our country for a long time. The biggest feature of this herbicide is that it is very fast and can effectively remove broad-leaved weeds or sharp-leaved grasses. However, the use of this herbicide also has a bad disadvantage, that is, it can not ** weeds, generally choose this herbicide, and the weeds will regenerate soon after weeding, because he does not have a good root-killing performance.

To sum up, the above are several herbicides that most farmlands in China prefer to use to weed corn. Each of these herbicides has its own advantages and disadvantages, and farmers must choose herbicides based on the condition of corn and weeds in the field. I don't know if there is anything else you need to add to the herbicide you use for weeding in your corn field?

Nicosulfuron can be used, its medicinal effect is very strong, so the effect of weeding is particularly large, you must pay attention when spraying, do not spray on corn.

Powerful nitrate, smoke and herbicide suspension, the most commonly used nicosulfuron, the largest number of people using mesotrione, these herbicides have their own advantages and disadvantages, farmers must choose according to the situation of corn and weeds in the field when choosing herbicides.

The herbicide of this brand is relatively good, and it has no effect on the land and corn, and the weeding speed is also very fast.

Nicosulfuron + atrazine: the common 4% nicosulfuron and 20% atrazine, which has the advantage of being low and can prevent some common weeds; The disadvantage is that the speed of weeding is relatively slow. Mesotrione + atrazine:

There is a common 55% mesotrione-atrazine, which has the advantage of fast grass death and can prevent most of the weeds growing in corn fields; The defect is that the price is relatively expensive, and it is easy to rebound after use.

What medicine is used for weeding after corn seedlings

Nicosulfuron + atrazine: 4% nicosulfuron, 20% atrazine (or 30% atrazine, composition 24% or 34%) are commonly used; The advantage is **low, and it can prevent common weeds in corn fields, such as horsetail, amaranth, duck plantar grass, and barnyard grass; The defect is that the speed of weeding is relatively slow, and the grass will slowly die after 20 days after spraying.

Azole + atrazine: 55% mesotrione atrazine is commonly used, which has the advantage of faster dead grass, and can be effective after spraying for about 7 days, and can prevent most of the weeds growing in corn fields, but the control effect on the elderly pu stick is more general; The defect is that the price is more expensive, and it is easy to rebound after the use of weeds.

Drug-damaged diseases

1. Nicosulfuron drug damage: the heart leaves of bracts turn green and yellow, or irregular green spots appear on the leaves, and some leaves curl into a cylindrical shape; The edges of the leaves are wrinkled, and the heart lobes are ox-tail-like and cannot be pulled out properly; The plant is dwarfed, sometimes resulting in scattered and secondary stems.

2. Fluorobenzene herbicide damage: the plant is dwarfed and the growth is inhibited (some seeds cannot be excavated); The leaves are deformed, the heart leaves are curled and unable to flex and extend, and the heart leaves are sometimes whip-shaped, and the other leaves are wrinkled or swollen in the underground stems.

3. Atrazine herbicide: the leaves of the plant turn yellow, but after 10-15 days, they can turn green and recover to grow.

4. Paraquat herbicide damage: the plant will immediately stop photosynthesizing at the location of the plant, and it will lose color and green after 2-3 hours, and then slowly wither.

Precautionary measures

1. Immediately water and apply fast-acting fertilizers such as potassium nitrate or urea solution to promote the absorption of water by the rhizomes of the bracts, which can improve the metabolic ability of the bracts and the dissolution rate of nicosulfuron in their bodies.

2. Moderate soil cultivation to improve soil permeability and plant absorption of water and nutrients.

3. Use 50-200ml l of auxin aqueous solution or 1%-2% urea solution and potassium dihydrogen phosphate aqueous solution as a leaf sprayer in the morning (after the dew drops are extinguished) or at dusk.

4. Spray the plants with lime powder or potassium carbonate cold water blocking solution (this method is suitable for alkaline substances that are easy to dissolve and ineffective herbicides).

You can use special herbicides, which can effectively remove weeds, and can also ensure the growth of corn seedlings, so be sure to choose a good herbicide.

According to the actual situation, it is necessary to use some pesticides that are less harmful, so as to better protect plants and protect the land.

Herbicides can be used. You can choose mesotrione, which is very effective and can effectively control weeds.

Corn sealing herbicide, dry ground is not suitable for playing, will affect the efficacy.

4 precautions for closed weeding before corn seedlings

1. Pay attention to the weeding time

Blocking herbicides should be sprayed within 7 days after sowing corn after sowing and before most of the weeds emerge.

For example, acetochlor, a tung back amide herbicide, is effective for annual grass weeds that have not yet soiled, and has very poor control effect on weeds that have emerged, and is basically ineffective against older weeds.

Therefore, the sealing herbicide must be sprayed within 7 days after sowing, if the weeds have been unearthed, do not spray the sealing agent, you can wait for the corn 3-5 leaves period, spray the herbicide after the stem and leaf treatment after the seedling.

2. Pay attention to the temperature and soil moisture during weeding

If the weather temperature is too low, it will affect the activity of the herbicide, resulting in poor weeding effect, in principle, the temperature during weeding should not be lower than 15 degrees.

At the same time, there are also requirements for soil moisture, if the soil is too dry, the weeding effect will not be good, if the humidity is too high, it is easy to cause pesticide damage.

3. Pay attention to the dosage used

In principle, it can not be used in excess of the amount, and the excessive use is easy to produce pesticide damage to the corn, and the seedlings will be incomplete and uneven after the pesticide damage, so it will affect the yield of the corn.

Generally, the soil field should be used in accordance with the recommended dosage of the product label (the upper limit of the registered amount of clay, the normal amount of loam, and the severe sandy soil should not be closed for weeding), if it is a plot with high wheat and corn stubble and machine-harvested wheat stubble, the dosage can be increased appropriately.

4. Pay attention to the spraying weather

When the wind reaches level 3 or above, do not spray again, otherwise the medicine mist will be blown away by the wind and reduce the efficacy of the medicine.

Before the rain, it is not suitable to spray in the rain, at this time, the rain will make the medicine infiltrate or lose with the surface water, affecting the weeding effect.

It is recommended to spray the herbicide when the ground is wet after the rain, when the herbicide is easy to diffuse to form an effective film.

Cornfield herbicides are best with nitrate, tobacco, atrazine suspension, oxazole ketazine, nicosulfuron and other drugs.

1. Nitrate, smoke and atrazine suspension.

In the 3-5 leaf stage of corn and the 2-4 leaf stage of weeds, 165-200 grams of 28% nitrate, tobacco and atrazine suspension agent per mu are evenly sprayed, which can effectively control annual broad-leaved weeds and some grasses such as barnyard grass, dogtail grass, horsetail, cow tendon grass, duck plantar grass, hemp, quinoa, purslane, amaranth retroflexus, iron amaranth, self-growing wheat seedlings and other annual broad-leaved weeds and some grasses.

2. Oxazolone terbutizine.

In the 3-8 leaf stage of corn and the 2-5 leaf stage of weeds, 80-100 ml of 26% oxazolone tertazine water dispersible oil suspension can be used per mu, and 17-30 kg of water can be evenly sprayed. It can effectively control annual broad-leaved weeds and gramineous weeds in corn fields.

3. Nicosulfuron.

It is a common corn post-emergence herbicide, the formula is all over the place, the stability is good, it has the effect of rooting weeds, and the safety of the pesticide is good, but the speed of dead grass is relatively slow, if the spraying temperature is not high, then it is normal to die grass 15-20 days after spraying.

Corn planting techniques

1. Land selection and land preparation.

The planting land requires fertile and loose soil, sufficient sunlight, convenient drainage and irrigation, and attention to the fact that there can be no water accumulation in the field, which is an important basis for obtaining high yields. Before sowing, water the bottom moisture, carry out fine rotary tillage, level the land, so that the ground is flat and fine, the stubble is not exposed, and there is no protrusion of soil clods, so as to facilitate the smooth emergence of seeds.

2. Lay mulch.

Where conditions permit, Bixin can be implemented to spread the mulch, because the mulching can not only increase the ground temperature, but also sow the seeds early, so that the products can be put on the market as soon as possible, which can prevent water evaporation, maintain soil moisture, and reduce the production cost of products. Generally, the distance between the mulch film is 100 cm, the ridge width is 80 cm, the ridge height is 15 cm, the mulch film should be straightened and tightened, paved, and covered tightly with soil around it.

3. Sow seeds. The planting time in the open field is around mid-March, and the planting time in the greenhouse will be much looser. Fruit corn has early and late maturing types, and the same piece of land can be planted at different times and listed one after another, not concentrated at the same time point, which is also good for income.

When sowing, the seed germ is facing down vertically, and the soil can be covered, and the soil can be covered with garbage soil, but large (coarse) soil blocks cannot be used, so as not to affect the emergence of seedlings.

Hello dear, the commonly used herbicides after the seedlings of corn fields are glyphosate, pre-grass ammonium, grass leaf phosphine, etc. These drugs can be applied by spraying or irrigation. However, when using herbicidal celery, we must pay attention to the method of use and dosage, and carry out protective measures in accordance with relevant regulations to avoid adverse effects on the environment and human body.

At the same time, attention should also be paid to follow the instructions for use and preventive measures to prevent cross-infection of drug damage, resulting in unnecessary regret and loss. If you are unsure about how to use herbicides, consult a professional and handle it with caution.