There are too many weeds in the corn field, how to control and deal with them?

There are too many weeds in the corn field, how to control and deal with them? This has to be treated differently according to the wishes of the grower and the degree of damage caused by the weeds in the plot.

Due to the influence of traditional intensive farming ideas, some elderly corn farmers generally like to hoe and weed by hand, which not only hoes but also improves soil air permeability. However, for younger corn growers, chemical weeding is preferred instead of manual weeding.

First, the weeding method of corn interplanting vegetables (wider spacing). When the vegetables are ridged, they can be covered with black mulch film between the corn rows, and the edge of the soil can be compacted, so that the weeds under the corn film will gradually yellow and die due to lack of sunlight radiation. Pay attention not to break the mulch film when mulching, otherwise the weeding effect will be very poor.

Second, the control of weeds in corn net cropping land. There are thousands of weeds in corn plots, and they boil down to several categories: grassy weeds, broadleaf weeds, and sedge weeds.

Poaceous weeds are both genus due to their similarity to the leaves of corn plants"Heben"nature, so weeding should be done with nicosulfuron, mesotrione and other agents. Broadleaf weeds and sedges are easier to say, and there are more herbicide varieties to choose from. Many products in the agricultural materials market are products made of broad-leaved weeds-based compound preparations.

Such as angry hoeing, once clean, jade grass net, bud rice net, etc.

However, in order to keep the weeds in the corn field for a period of time after death, a certain amount of closed herbicide must be compounded with herbicides. Otherwise, after the weeds die, a batch of weeds will rise in the ground, and one after the other will not be clean.

Common commonly used sealing herbicides in corn fields such as acetochlor, atrazine, atrazine, simazine, etc. However, there are more pesticides compounded with acetochlor and atrazine in the agricultural materials market or corn herbicide products. For example, acetochlor mixture is a compound of acetochlor and atrazine.

Atrazine and atrazine are the compound of atrazine. The mixture of nitrate is a ternary compound preparation of mesotrione, nicosulfuron and atrazine.

If the weeds are young in the early stage of corn seedling growth, a corn herbicide based on soil closed weeding can be selected. Acetochlor mixture, acetochlor mixture or a single dose of acetochlor can be used.

If in the middle of corn growth, due to the failure of weeding in the early stage, the weeds in the middle stage grow violently, and the corn forms a situation of competing for fertilizer and glory, and the corn can choose a corn herbicide that can hit the grass.

For example, you can choose a corn herbicide made of nicosulfuron, atrazine, mesotrione (or nitrocapazone) and other compounds to achieve the double weeding effect of killing and blocking.

After the stalk of the corn hanging plant turns yellow, due to the aging of weeds in the middle and late stages, the general corn special herbicide has been used for this kind of weeds"There is nothing that can be done", so it should be chosen"Glyphosate""Diquat fast"and other herbicides for directional spraying weeding between corn rows. In order to enhance the herbicidal sealing, it can be used in combination with acetochlor or atrazine, and the effect is better.

Weeds in corn fields can be treated by manual eradication and spraying of pesticides, by removing weed seedlings and seeds, and by spreading mulch.

1. Weeding should be done as soon as possible.

Weeding at the seedling stage of corn should be done as soon as possible, and the weeds can be applied once before they are unearthed, which can effectively control the weed damage during the whole growth period. Soil closure is carried out before corn seedlings, which has good weeding effect and high safety. If no measures are taken before the weeds are unearthed due to weather or other reasons, correct control can be carried out when the weeds are 3 5 leaves and 2 4 leaves after the corn seedlings, which can effectively control the growth of weeds.

2. Herbicides should be appropriate.

Herbicides after corn emergence mainly include atrazine, nicosulfuron, oxanone nitrate, etc., weeding must be sprayed according to the instructions, not too much, to avoid pesticide damage, weeds are not unearthed generally with 150 200 grams per mu for prevention, after seedlings generally use 4% atrazine and 20% nicosulfuron mixed preparation, or on this basis add 2% 3% mesotrione, 80 150 grams per mu, with 30 kg of water stem and leaf spray. Herbicides are generally diluted twice to avoid pesticide damage caused by uneven concentration.

3. Control soil moisture and temperature.

Appropriate soil temperature and humidity is the key to ensure the efficacy of the drug, and the dosage should be increased when the weather is dry; When the soil is wet after rain, the dosage can be reduced or the normal dosage can be used, and the sprayed pesticide is easy to form a film on the soil surface, and the weeds and the pesticide can be killed by contact. If the soil temperature is low, the dosage of the agent can also be increased to avoid the effect is not obvious.

1. Manual removal (time-consuming and laborious, not recommended). 2. Add a safe herbicide during the appropriate spraying period, and choose to spray it at the 3-5 leaf stage, which has little impact on corn.

Corn is one of the foods that people know and love, it tastes delicious and can be made into a variety of delicacies. China's corn planting area accounts for a certain proportion, and it is inevitable that there will be too many weeds in the planting process. In the face of the disaster of this weed, manual weeding or chemical weeding can be used, both of which can achieve the purpose of weeding, but the latter is more efficient.

The period when corn seedlings grow in the ground is also a period when various weeds are vigorous. At this stage, if weeds grow uncontrollably, they will compete with corn seedlings for water, space, nutrients, and light, which will lead to stunted growth of corn seedlings in the long run, affecting the corn harvest. The weeds in the corn field can be mainly divided into two types: gramineous weeds and broadleaf weeds, and a small number of other species of weeds.

The first way to get rid of weeds in a corn field is manual weeding, which can be done with the help of a hoe.

This tool for weeding can also enhance the permeability of the soil while weeding, so that the roots can better absorb water, but the disadvantage is that it is very time-consuming and laborious. Another method is to use chemical agents for weeding, this method of weeding efficiency is very high, saving time and effort, but its disadvantage is that if it is not used properly, it may also harm the corn seedlings. When using chemical agents to control weeds, you need to pay attention to the types of weeds in the field, if there are multiple types of weeds that need to be mixed with chemical agents for weeding, and different herbicides should be used at different times.

The weeds in the corn field have a great impact on the corn harvest, so we must remove them in time, and we can choose the appropriate method for weeding according to our actual situation. If the area of the corn field is not large, and you want to avoid the use of chemicals, you can use manual weeding. On the contrary, chemical agents can be used to control weeds, but it should be noted that chemical agents should be used correctly, and the liquid medicine must be configured in strict accordance with the specified amount to avoid affecting corn seedlings.

Be sure to spray herbicides in a timely manner, and you can also do weeding manually, pay attention to the use of fertilizer, and do not over-fertilize.

In general, it is handled manually, by spraying pesticides.

Vegetables such as corn and soybeans and peanuts can be planted in rotation, which is an effective defense against weed growth. We can do weeding in advance before planting and spray some herbicidal medicine. It is also possible to get rid of weeds in the corn field by spraying herbicides, which can be very fast and more efficient.

In the spring maize area with low temperature and arid temperature, the cultivation technology of plastic film mulching is often used to increase the ground temperature and moisture preservation, so as to promote the rapid growth of maize seedlings. Due to the high temperature and high humidity in the plastic film, it is very conducive to the exertion of herbicide efficacy, therefore, compared with open field application, a lower herbicide dosage (generally 1 4 1 2 less than the conventional dosage) can obtain a good weeding effect.

We can choose a person to pull the weeds manually. Use a hoe to hoe the grass. Prepare in advance before planting corn or after corn emerges. Hoeing the grass or pulling the weeds by hand. Carry out the treatment of weeds.

There are a lot of weeds in rural corn fields, in addition to the use of herbicides, the most effective way is to manually weed, and although manual weeding is more difficult, but the prevention and control of weeds is also very large. It is also possible to use organic fertilizer for weeding at high temperatures.

When planting corn, you can also spread mulch, which can reduce the growth of weeds, and then after the corn emerges, the grass also comes out, and the grass can be manually removed.

Personally, I think that in addition to using herbicides, we can do weeding manually. Because other methods will not completely eliminate these weeds, only manual weeding will uproot these weeds, so that there is no possibility of them regenerating.

The corn field sprayed with corn herbicide, in the later stage, is still overgrown, herbicide is a drug, there is an expiration date, we buy herbicide on the package has a clear statement. Moreover, in the corn field sprayed with herbicides, the wind and sun and rain are exposed every day, and the effect of the medicine expires faster; When the effect of the herbicide has passed, the grass seeds hidden in the corn field, the grass seeds blown in from other places or the grass seeds washed by the rain begin to sprout and take root, and the grass grows very fast, and if you ignore it for half a month, it will grow all over the ground, so there will be cornfields sprayed with herbicides, and the later period will be overgrown. How to prevent, the prevention of weeds in the corn field, we are divided into two situations, the first is the method of manual prevention, the second is the method of herbicide prevention and control of weeds in the corn field, we are divided into three steps, respectively, the land is cleaned up before planting corn, the corn field is surrounded by drainage ditches, and the weeds are cleaned up regularly after planting.

When there are more weeds, you can spray them a second or even a third time, of course, we can only spray half of them a second time, and the herbicide used to make celery is different each time, so as to prevent weeds from showing resistance. In particular, in the late autumn period, the weeds in the corn field have fallen into the ground, which increases the incidence of weeds in the wheat field in the future, and we must pay special attention to prevention and control. Otherwise, weeds will grow in the wheat field, forming a vicious circle, and it will be more difficult to deal with it.

To do a good job of weeding in wheat fields, there are two ways to control it: before or after the year. Select herbicides according to the instructions, and use fluzosulfuron, pyridoxam, and alkynyl ester for the control of finch wheat, wild oats, kanmai niang, and weed; For the prevention and control of arthropod wheat and poisonous weed, methyldisulfuron or koshima, etc., should be sprayed with water according to the description.

In order to effectively prevent weed growth, the following steps should be taken:

1.Choose effective herbicides: Choose herbicides that target specific weeds, rather than one herbicide that prevents all weeds from growing;

2.Strengthen soil management: do a good job of soil deep tillage in time to improve soil permeability and temperature, and then use organic fertilizer and organic fertilizer to increase soil quality to inhibit the growth of weeds;

3.Increase plant spacing: Crop spacing should be increased as much as possible to reduce the chance of weed germination;

4.Strengthen weeding measures: weeds should be removed in time when weeds are found to reduce the accumulation of weed seeds;

5.Increase the number of weeding: the number of weeding should be increased in a timely manner to prevent weeds from seizing the growth space;

6.Use weeding belts: Brother Jane uses weeding belts at the edges to stop weeds from entering the planting area from the outside;

7.Use of weeding machine: Mechanical weeding machine can be used to save manpower and can remove a large number of weeds in a short time.

Weeds in corn fields can be controlled and treated by spraying herbicides.

Corn herbicides mainly include sulfonylurea herbicides, triazine herbicides, phenoxycarboxylic acid herbicides, amide herbicides, organophosphorus herbicides and bipyridine herbicides. Triazine herbicides mainly include prometrinet, atrazine, cyanazine, etc.; Sulfonylurea herbicides mainly include sulfasulfuron, nicosulfuron, thiensulfuron, etc.; Organophosphorus herbicides mainly include glyphosate.

The main weeds in corn field are: broad-leaved weeds, Amaranth retroflexus, Quinoa, Spinning, Nightshade, Amaranth, Amaranth, Iron Amaranth, Purslane, etc.; Poaceae weeds, dogtail grass, horsetail, cow tendon grass, etc.; Cyperaceae weeds include fragrant aconite, etc.

When the weeds in the corn field are large, atrazine herbicide can be used.

Atrazine herbicide can control a variety of annual grasses and broadleaf weeds. It is suitable for the control of horsetail, barnyard grass, dogtail grass, sedge, kanmai niang, knotweed, quinoa, leguminous weeds and leguminous weeds of corn, sorghum, sugarcane, fruit trees, nurseries, woodlands and other dryland crops.

How to use:1The use of corn field summer corn is used before emergence after sowing, and the soil organic matter quality is 1% to 2% in North China, Shandong and other places, 150 to 200 grams of 50% wettable powder per mu, or 175 to 200 ml of 40% suspension agent; In the Northeast region where the soil organic matter content is greater than 3% to 6%, 200 to 250 grams of 50% wettable powder or 200 to 250 grams of 40% suspension agent per mu, the lower limit for sandy soil and the upper limit for clay soil.

1 to 3 days after sowing, spray the soil surface evenly on 30 kg of water. After the emergence of corn, the appropriate period is the 4-leaf stage of corn and the 2-3-leaf stage of weeds; For sandy soils with low organic matter content, use 200 to 250 grams of 50% wettable powder or 40% suspension agent per mu. Spray on 30 to 50 kg of water.

Spring corn per mu with 40% suspension agent 200 to 250 ml, add 30 to 50 kg of water, spray the soil surface before seedlings after sowing, mix soil after spring drought medicine, or appropriate amount of irrigation. Or in the 4-leaf stage of corn as stem and leaf treatment. In the continuous cropping area of maize and winter wheat, in order to reduce or eliminate the pesticide damage of atrazine to wheat, atrazine can be used to reduce the amount of atrazine and mix it with herbicides of grass jingjin, lasso, dol, 2,4 to d butyl ester, bannong and green melon.

2.5 to 7 days after the cane is planted, the weeds are partially unearthed, 200 to 250 grams of 50% wettable powder or 40% suspension agent per mu, 30 kg of water is added, and the surface is evenly sprayed.

3.Tea gardens, orchards, vineyards use the peak period of weed germination in the field from April to May, first eradicate the unearthed grass and overwintering miscellaneous lines, and then use 250 to 300 grams of 40% suspension agent per mu, and evenly spray the soil surface with 40 kg of water.

Atrazine is a herbicide for pre-bud soil treatment, and can also be treated with stems and leaves after budding. Drought has a great impact on the efficacy of the medicine, mainly on dicots, focusing on closure, and the effect on grass is not ideal. It also has a certain inhibitory effect on some perennial weeds.

The residue period of atrazine in the soil is generally about 6 months, because its residue period is relatively long, so it needs to wait for a period of time after application to plant the next crop, for cucumbers, it generally takes about 40 months to plant, and tobacco, alfalfa, sugar beet, rape, flax and other crops also need to go through 24 months before planting.