Will herbicides cause pesticide damage to corn? How can it be prevented?

How to prevent herbicides from causing pesticide damage to crops? I am a lifelong farmer. An agricultural material dealer who has been dealing in pesticides for almost 30 years.

The moisturizing effect is better. The use of herbicides should ask more, ask precautions, listen more, listen to the dealer to introduce his taboos to you, one is to choose herbicides suitable for crops, herbicides for different crops can not be used indiscriminately. The second is the appropriate time, temperature, concentration, soil moisture, in strict accordance with the product instructions or the guidance of agricultural technicians.

The third is accurate spraying, no leakage, no respraying.

<> look more, look at the instructions for precautions, the purchase of pesticides must look at the three certificates and the record, different crop varieties, seedlings are different, will also have an impact on the effect, in rice production, herbicides caused by pesticide damage will occur every year, the severity of the pesticide damage is also different, summarize the causes of pesticide damage are basically the following points, the amount of pesticide is too large, the application method is incorrect, the application period is not right, the choice of pesticides, etc., I will elaborate on this belowThe first is to pay attention to the period of medication. For example, wheat herbicides, some herbicides are used before the jointing period of wheat, and it is strictly forbidden to use them after the jointing period, if they are not used properly, weeding before seedlings. Pre-emergence weeding is the most critical step.

Some herbicides are used before seedlings, that is, sprayed before seedlings emergeIn rice production, herbicides caused by pesticides will occur every year, and the severity of the pesticides is also different, and the reasons for the pesticide damage are basically the following, the dosage is too large, the application method is incorrect, the application period is not right, the choice of pesticides, etc., I will elaborate on the herbicide on the crops? Combined with the various problems encountered in my practical work, I would like to talk about some of my own views and suggestions.

Yes, the right choice of cornfield herbicides.

In the spring maize planting area, it is necessary to fully understand the performance and application methods of each herbicide variety, and select herbicide varieties that are safe for maize according to the weed species in the field. In the summer maize planting area of North China, pre-emergence and post-emergence closed weeding can be selected with high efficiency, low toxicity, low residue and non-toxicity.

Yes, corn is also a plant, so herbicides can cause pesticide damage to corn. However, corn is a monocot and can be treated with specific herbicides, as some herbicides can only remove dicots.

It will cause drug damage.

To prevent, is the correct use of herbicides, the use of herbicides in corn fields, do not change the use of instructions at will, in strict accordance with the guidance of the instructions for use, when corn seedlings are harmed by herbicides, immediately spray brassinolide and other growth-promoting agents, strengthen fertilizer and water management, used to combat the harm of herbicides, no matter how good the herbicide antidote, will not completely eliminate the harm of herbicides, therefore, in order to prevent corn seedlings from herbicide hazards, when spraying herbicides, must be cautious and cautious.

It is necessary to apply traditional agricultural measures to promote the growth of maize, intermittent rain is more, the soil in the field is compacted, the soil should be cultivated and loosened, the rhizosphere permeable environment of maize should be improved, the development of new roots should be promoted, and the vitality of seedlings should be enhanced. Top application of nitrogen fertilizer can enhance the fertilizer supply capacity, transform stems and leaves, and improve photosynthetic efficiency; Combined with chemical control, it activates corn seedlings to resume growth. Use more, use less. No crop can completely resist the pesticide damage of herbicides, and blindly increasing the dosage is very easy to produce pesticide damage.

Loosen the soil and cultivate it to enhance the vitality of the root system. Watering enough water to make the maize roots absorb a lot of water, thereby reducing the concentration of herbicides in the body, and combined with watering and topdressing nitrogen fertilizer, the root growth was promoted, the growth rate of maize was improved, and the pesticide damage was reduced. <

Overdosing. Whether it is pre-emergence closure or post-herbicide, it is necessary to spray according to the specified dose, if the amount is increased without authorization or accidentally used too much, it will lead to pesticide damage. Spraying too late.

Generally speaking, corn closed herbicides are sprayed within 7 days after sowing, and if sprayed too late, wait for corn seedlings to come out before spraying, which will cause pesticide damage. The temperature is too low at the time of spraying. This is mainly planted in spring corn, generally at the end of April or early May, when the temperature is not too high or when spraying, the weather suddenly cools down, which will also cause pesticide damage.

Even rainy weather after spraying will cause water accumulation in the field, which is also a cause of pesticide damage. <

When the temperature is high and the weather is dry, the liquid volatilizes quickly, and after spraying for a period of time, the liquid will evaporate, and its transpiration will accelerate the damage of corn seedlings. The application method is improper, and it can be mixed at will. After the defoliation stage of corn, the application of pesticides is not directed spraying, and even mixed with insecticides, and a large amount of liquid pesticides cause pesticide damage in the corn heart leaves.

Even when mixed with organophosphorus pesticides, corn is prone to pesticide damage. <

On our side, farmers grow only three crops, and that is corn, peanuts, and wheat, which are typical crops in our north. Now that it is the season of corn harvest, the people look at the corn growing vigorously in the fields, and their hearts are full of mixed feelings. Don't look at the corn that has been ripe and harvested now, but I don't know how much effort the farmers wasted in the early days of the corn.

One. Try not to apply herbicides to corn seedlings.

If you are afraid that corn seedlings will be stained with herbicides, then the best way is to try not to play herbicides when corn seedlings are young, the reason is very simple, this is because corn in the seedling period and people are very weak in the same way and resistance when they are young, and they are sensitive to things, at this time the possibility of getting the herbicide scan is extremely high, and the rescue methods are very few.

Two. Water the corn seedlings to dilute the concentration.

If it is the root of the corn seedling, accidentally sprayed with herbicide, then it must be watered every once in a while to dilute the poison component of the root, which can only save part of the corn seedling with very strong vitality, and cannot guarantee that it can save each corn seedling.

Three. Herbicides can be applied in the middle of corn seedlings.

We know that there are many more weeds in the corn field than in the peanut field, manual weeding is really very tiring, and it is also time-consuming, not that the corn field can not play herbicides, but try not to take the young period of corn herbicides, and wait until the corn seedlings continue to grow, to the middle of the time, this time the herbicide will not be too harmful to the corn, and the same can achieve the effect of weeding.

Although herbicides can help plants control weeds, they can also be harmful to crops. If this happens, the corn should be watered as soon as possible.

If the leaves have green spots and fade slightly, they can be sprayed with foliar fertilizer and growth regulators; If the stem and leaves are more seriously dry, but the heart leaves have not died, the fast-acting nitrogen fertilizer should be applied first, and then the ground should be watered continuously. In addition, measures such as loosening the soil, increasing ground temperature and soil aeration can also effectively alleviate the pesticide damage of corn seedlings.

For corn that suffers from herbicide pesticide damage is more serious, it should be ploughed and replanted with other crops in time to make up for the loss. For maize seedlings with slight pesticide damage, as long as the symptomatic management is grasped, it can be completely alleviated and the growth can be restored.

Hello, the effects of different herbicides are also different, so let's list a few:

1. Damage of benzoic acid herbicides.

When the pre-emergence use of maize is excessive, the primary roots increase, the growth is inhibited, and the upward growth is weakened. If the seedling stage is used excessively, the taproot is flattened, the leaves are narrowed and partially wriveled, the heart leaves are shallot-like leaves, the stems are fragile, and they are easy to lodging and breaking.

If the application is too late, the shoots produce short and thick deformed macro-shaped support roots, the taproots are short, the growth is inhibited, and it is easy to lodging.

2. Amide herbicide pesticide damage.

When the dosage is too large, it will cause dwarf of corn plants;

Some seeds cannot be unearthed, the growth is inhibited, the leaves are deformed, the heart leaves are curled and cannot be stretched, sometimes whip-shaped, the rest of the leaves are shrunken, and the rhizome nodes are swollen. Heavy soil clay and cold wet blocks can promote the formation of pesticide damage.

3. Triazine herbicides.

The use of corn in the 5-leaf stage after seedling can also cause pesticide damage to corn under low temperature and rainy conditions. It is manifested as yellowing of corn leaves. Generally, the leaf color can turn green after 10-15 days and return to normal growth.

In the process of planting corn, many farmers will apply herbicides, but if the dosage is used incorrectly, it is likely to harm the corn seedlings. So be sure to use it sparingly. Sakura burns.

Corn may die, and the use of herbicides is not very reasonable, which will seriously affect the normal growth of plants.

Farmers apply herbicides to corn, and the problem that tends to occur is that the corn does not grow well, and then the corn is not very tasty.

You can spray it again, if it doesn't work again, because you should go to the person who sells pesticides to ask what the reason is, is it the problem of Yaoshou Qiaoyan? Re-spraying will not cause pesticide damage.

The efficacy of herbicides and the occurrence of pesticide damage have a great relationship with temperature. For example, nicosulfuron, methylsulfone, etc., in the case of low temperature, the effect of the drug is slow or poor. It is easy to produce pesticide damage under high temperature conditions.

Therefore, the application of pesticides around the evening is relative to the crop. Under drought conditions, the efficacy of the drug is often not good; After rain, the pesticide is applied, and the soil moisture is high, and the effect is better; When pesticides are applied in windy weather, the liquid drifts and the efficacy is not good, and the drift is easy to cause pesticide damage to other crops. If the corn post-emergence herbicide is not used properly, it is not only incomplete weed, but also may cause certain pesticide damage.

Therefore, after the spray has no effect, it is necessary to spray again at an interval of 2-3 days. What is more important is that the use of herbicide after corn seedlings must be used properly to avoid pesticide damage.

I think there will definitely be pesticide damage, and in this case, we can only choose manual weeding.

Summary. Hello, the corn seedling herbicide does not work can be operated like this: manual weeding with hoes, cocoons, weeders, etc., although this method is time-consuming and laborious, but will not cause pesticide damage to corn seedlings, the herbicide used is not effective, it is recommended to change the variety.

Re-spraying will produce pesticide damage, which will cause pesticide damage to corn seedlings and affect their growth and development <>

What should I do if the corn post-emergence herbicide doesn't work? Will re-spraying cause pesticide damage?

After the corn seedlings, I sprayed the herbicide again, but it didn't work, what else can I do.

Hello, corn post-emergence herbicide does not work can be operated like this: manual weeding with hoes, cocoons, weeders, etc., although this method is time-consuming and laborious, but will not cause pesticide damage to corn seedlings, the effect of the herbicide used is not good, it is recommended to change the variety. If it is sprayed again, it will cause pesticide damage to corn seedlings and affect their growth and development

In order to ensure the safety of crop production and environmental protection, the use of herbicides must be applied in accordance with the dosage of the instructions and precautions to avoid pesticide damage and environmental pollution, do not cause harm to people and animals with herbicides, and avoid harm to surrounding water sources and aquatic organisms when using glyphosate.

If you can't get rid of it manually, you can still inject what medicine will not hurt the corn.

It is necessary to pay attention to the dosage and need to spray the grass for the second time at an interval of 10 days, so as to avoid the accumulation of pesticides and pesticide damage to corn seedlings.

Herbicides can be used, but you need to pay attention to the dosage used, which should be about 10 days apart, otherwise it will be harmful to the corn.

<> for poor weeding effect, herbicides can generally be applied twice, but the time between the two applications needs to be at least about 7 days. It should be noted that the second spraying of herbicides also needs to meet some conditions, for example, after the application of the rain, the rainfall is very large and lasts for a long time, and the solution is washed away, then the second herbicide can generally be considered as appropriate, but if the rainfall is small and the duration is short, it is usually not necessary to spray the second time.

1. Can corn be treated with herbicides twice?

1. Can herbicides be sprayed twice?

If the weeding effect is not good, the herbicide can generally be sprayed twice, but it needs to be sprayed twice after an interval of at least 7 days to prevent pesticide damage. It is important to note that herbicides can generally only be used on weeds, not corn.

2. Conditions for the second herbicide.

1) It rains immediately after application, the rainfall is heavy and lasts for a long time, and it can usually be hit a second time as appropriate.

2) After the herbicide is applied, if the weeds are not poisoned, the herbicide can generally be sprayed a second time as appropriate. It should be noted that the effective time of each type of herbicide varies, so it is necessary to make sure that the weeds are indeed not poisoned before spraying the herbicide a second time to prevent pesticide damage.

3. When can you not apply the herbicide for the second time?

1) If there is light rain after application and the duration is short, the second herbicide can generally not be used.

2) If the weeds have been poisoned, then it is generally not recommended to respray to avoid pesticide damage.

2. What should I do if there is pesticide damage after using corn herbicides?

1. How to solve the drug damage.

When the pesticide damage occurs, it can generally be relieved by spraying 50-200ml l of gibberellin solution in the morning after the dew has dried or in the evening, or 1-2% urea.

2. How to avoid drug damage.

1) Use herbicides in strict accordance with the instructions for use, and do not increase the dosage at will.

2) Herbicides should not be mixed with organic phosphorus pesticides and compound preparations containing organic phosphorus to prevent pesticide damage.

3) Generally, herbicides can be applied in the weather with low temperature and suitable humidity, and can generally be applied at 6 o'clock in the evening, and can not be used in high temperature, high humidity, high temperature and drought weather to avoid pesticide damage.