Herbicides are used every year to grow wheat, will this cause pollution to wheat in the long run?

Now our wheat seeds, corn seeds, peanut seeds, etc., have undergone a series of treatments in the process of processing, and they are not simply taken out of the ground and used for planting, they have also undergone some disease-resistant treatments. Wheat fields were sprayed with herbicides years ago.

Choose a reasonable time. Weeds appeared in wheat fields a few years ago, generally twenty or thirty days after wheat sowing, that is, as the wheat sprouts and seedlings, weeds also begin to grow.

<> herbicides and insecticides.

Fungicides are not the same, the latter two should be added in some amounts, the problem is not big, and if the herbicide is increased privately, it is very likely to cause pesticide damage, especially some farmers, long-term use of a certain herbicide, resulting in greater resistance to local weeds, in the wheat growth process, some periods, weeds can resist the medicinal properties of herbicides, but the safety of wheat will be affected, so it is necessary to correctly grasp the application period of wheat herbicides to avoid causing pesticide damage to wheat.

If there is a drought during this period and the soil in the wheat field is dry, it is necessary to increase the water consumption when applying herbicides, that is, the concentration should not be so high, because even the weeds grow slowly or relatively little during the drought; Secondly, the use of herbicides in the growing period of crops, so that special caution, must be the right medicine can not use the wrong herbicide, when applying the herbicide must not be stained on the branches and leaves of crops, and the dispensing can not be too heavy, otherwise the crops will mutate and even die!

In spring, the wheat is back to green, and it is time to weed. After the beginning of spring, the temperature rises and everything grows.

Not only is the wheat turning green, but the weeds are also growing rapidly. During this time, the temperature in many places is not high, and the effect is much better when the sun is good. Chemical weeding is carried out before jointing of wheat.

At this time, the temperature rise is conducive to the efficacy of herbicides, and it is not easy to produce pesticide damage, and the weeding effect is also very good. In the process of control, it is necessary to select appropriate herbicides according to the types of weeds in the field to carry out chemical weeding in wheat fields. There are two time periods for the use of wheat herbicides, and the best time to apply them is before the tillering of wheat in winter.

and the early stage of the second year's wheat rejuvenation.

It will not cause pollution, because the herbicide will be volatile, will not affect the normal growth of the wheat, will not be absorbed by the wheat, it will not appear pesticide residues, you can rest assured.

Yes. Wheat is also a plant, and pesticides can be more or less harmful to plants.

Herbicides are used in wheat fields every year, which is what every household needs to do when planting wheat, in fact, not only wheat peanuts, corn, and soybeans are planted in the process, but also herbicides, and they are also played every year, in fact, this disease will not be polluted, now our wheat seeds, corn seeds, or peanut seeds, etc., have undergone a series of treatments in the process of processing, and they are not simply taken out of the ground to be planted, they have also gone through some disease resistance, pollution prevention, Insect resistant treatment, so as long as the herbicide is used reasonably, according to the instructions, there will be no pollution to the wheat, but we should not treat the herbicide as a panacea, as a non-toxic, if we use too much, or the concentration is too high, he is also harmful to wheat, because the rain on the herbicide is in a certain capacity, excessive use, there will be herbicides left on the surface of the wheat, causing a certain impact on it.

At present, the climate, temperature and other conditions in the winter wheat planting area are different, and the medication time is also different. However, depending on the condition of wheat and weeds, the previous year is generally better. At first, weeds grow next to the collapse and have low resistance to herbicides.

After the year is completed, the weeds are not good to be beaten by herbicides, which affects the effect of weeding. Some herbicides have some *** on wheat, and the slower they are sprayed, the more they will have an impact on the yield of wheat in the later stages.

Weeds are relatively small, less resistant to herbicides, and weeds die completely. It is conducive to wheat overwintering, and after the weeds in the field are removed, the probability of reducing wheat, water and nutrients is reduced, which indirectly promotes the development of wheat and is conducive to wheat resistance to cold weather. Accustomed to playing years ago, and the people in the neighborhood fought years ago, the psychology of going with the flow.

Reasons why herbicides are recommended in advance. Weedicide effect, under the same conditions, the effect of herbicides in the previous year will be relatively better than that after the year, there are three main reasons, weed tolerance is small.

The good control period for weeds is the 2-4 leaf stage; In the year of the monkey, after the wheat is sealed, the amount of weeds can be reduced compared with the amount of weeds, and in general, the effect of weeding in the previous year is better than that of the next year (the same external conditions). The cost of weeding, from the analysis of the cost of weeding, due to the year after year, the reason is the problem of the amount of medicine, now after the early seedlings of wheat in the city, the herbicide, the general specification is one mu (bottled bottle), found the use of the instructions, weeds are used in the 2-4 leaf stage, that is to say, this amount is the amount of medicine near the emergence of weeds.

After the year weeds up to 5-6 leaves, after growing up, if you want to achieve the effect of weeding, you can increase the amount of medicine accordingly, the previous set of medicine hit an acre of land, and only 7-8 minutes after the year, which increases the cost of invisible Chinese medicine. Precautions for the use of wheat herbicides: when spraying herbicides, the temperature is not too low, and the temperature can be above 10 degrees when taking the medicine (the temperature difference is large, it can be according to the temperature of noon and morning).

When using a sprayer to control herbs, it is recommended that the weather is sunny, after 10 noon to 16 pm, and there is no wind in the medicine. When spraying wheat herbicide, the liquid is mixed evenly, and heavy spray and leakage spray are not applied.

This is because the temperature is relatively low before the year, and the grass in the field is currently in the germination stage, and the herbicide will not cause certain impact and damage to the wheat at this time, and it can prevent the growth of the grass room and play the best weeding role. The main difference is the choice of drug concentration, the effect of the herbicide, and the degree of damage to the wheat.

Weeds have just emerged before the year, so the resistance is not particularly large at this time, and the weeds are not easy to be knocked down by herbicides after the year, which will affect the final weeding effect. The time is different, the effect is different, and then the impact on the amount of orange in wheat producers is also different.

Because the weather before the annual change is relatively cold, and the wheat is scattered and buried is relatively low, and there are fewer weeds, at this time, herbicides can better remove the weeds every day. The difference is that the types of wheat herbicides are different, and the amount of pesticides used is not the same, and the concentration is different.

This can better remove the weeds, which is conducive to the growth of plants, can avoid nutrients being absorbed by weeds, and the serious infiltration brigade affects the yield of plant preparations, the biggest difference is that the composition of herbicides used at different times is different, and the content is not the same.

<> wheat sowing too late, there are three main effects: first, wheat seeds in the soil can not reach the appropriate germination temperature, affecting wheat germination and emergence, resulting in lack of seedlings and broken ridges; Second, wheat is sown too late, which is prone to frost damage, forming weak seedlings or yellow seedlings, and the ability of the root system to absorb water and fertilizer will also be reduced; Third, there may be an early phenomenon in the heading period, and there may be a late harvest. Wheat is generally herbicide about 40 days after sowing, at this time wheat is not only more tolerant to herbicides, but also the weeds are smaller in age, which is more conducive to killing.

1. What happens if the wheat is planted late

Wheat sowing too late has the following three main effects:

1. The later the sowing time, the lower the temperature, if the strong cooling weather is encountered, the wheat seeds can not reach the appropriate germination temperature in the soil, or just exceed the germination problem, which will affect the germination of wheat seedlings, resulting in the phenomenon of lack of seedlings and broken ridges. At the seedling stage, the situation will not change much regardless of whether it is replanted or destroyed.

2. Wheat is sown too late, which is prone to frost damage. The reason is that the growth time is short, the root system of wheat is not deep, its own resistance is weak, after the cooling comes, it is easy to form weak seedlings or yellow seedlings, the ability of the root system to absorb water and fertilizer will also be reduced, the resistance of wheat seedlings itself decreases, and the probability of frost damage is greatly increased.

3. If the wheat is sown too late, the heading period may be early, and there may be a late harvest. On the one hand, in the middle and late stages, the risk of hot and dry air is greater, and the chance of lodging also increases. On the other hand, if the harvest time is delayed, you may not be able to wait for the harvester, and if you use the method of harvesting wheat manually, it is time-consuming, laborious and labor-intensive.

Second, how long can wheat be planted with herbicides

1. Wheat is generally herbicide about 40 days after sowing. At this time, the wheat is in the 4-leaf or 4-leaf 1-heart stage, the temperature is greater than 8 or above, and the herbicide is more resistant to silver sales, and the herbicide is safer than the skin. In addition, most of the weeds have grown at the 4-leaf stage of wheat, and the grass age is small, the wheat has no tillering, and there are not many leaves, so it is relatively easy to kill weeds with herbicides, and the efficiency is higher.

2. Wheat can also be used as herbicides when the temperature rises above 8 after the beginning of spring. When the cold winter passes, the new year begins to spring, the earth temperature begins to gradually warm, spring flowers bloom, wheat and weeds begin to regain vitality, at this time the temperature, soil moisture, wheat and weeds are suitable for the use of herbicides.

Now wheat weeding is not necessarily harmful to wheat.

As long as the temperature does not fall below 6 degrees, it will be fine.

The use of wheat herbicides is generally carried out when the local average daily temperature is stable above 6, and the spraying effect is best when the temperature is about 10.

Wheat herbicides.

Temperature. 1. Generally, when the average temperature is higher than 6, the control effect of herbicides is better, and benzuron-methyl and other agents are sensitive to temperature, and under low temperature conditions, 15 to 20 days after spraying, or even 1 month later, will have a better control effect. Herbicides need to be used on sunny days and when the temperature is slightly higher, generally at 10 am or 3 pm, if the land is dry, herbicides need to increase water consumption, will have a better control effect.

2, the wheat herbicide should not only master the temperature, but also to grasp the time, the general wheat herbicide suitable time is the wheat tillering period before winter, and the second year of the early stage of the wheat jointing in Xiaozizhou, these two periods of herbicide control effect is better, the wheat is also safe, if the time is late, the effect will be poor, the "2,4 to d butyl ester" herbicide as early as possible, benzensulfuron is better to use before the wheat returns to green, can avoid pesticide damage to the next crop.

Combination recipes. 1. For the prevention and control of broad-leaved weeds such as humulus, camellia, Maijiagong, Artemisia annua, ionic grass, etc., 75% benzuron water-dispersible granules can be used, with a suitable dosage of 1g per mu, or 10% besulfuron wettable powder, with a suitable dosage of 10g per mu.

2. For the prevention and control of Grass grass, 70% fluzosulfuron water dispersible granules can be used, and the appropriate dosage per mu is 3 to 4g.

3. For the prevention and control of bowl flowers, 20% chlorofluoropyroxyacetic acid emulsifiable concentrate can be used, and the appropriate dosage per mu is 50 to 70ml.

4. For the prevention and control of Vulgaris and Mai Niang, 15% alkynyl ester wettable powder can be used, with a suitable dosage of 30 to 40g per mu, or emulsifiable concentrate of emulsifiable cocozole, with a suitable dosage of 30 to 40ml per mu.

5. For the prevention and control of the mixed growth of finch wheat grass and broad-leaved weeds, 3 to 4g of 70% fluzosulfuron water dispersible granules and 10g of 10% benzensulfuron wettable powder can be used per mu.

6. The above formula needs to be mixed with water for the first round of 60 to 80 catties per mu, and it can be sprayed evenly with spraying trucks and hand pressure sprayers.

Wheat can now be herbicide on a poor chain, but there are several periods when herbicide cannot be applied. 1. Don't: Do not use herbicides before the 4th leaf of wheat and after jointing Before the 4th leaf stage, wheat is relatively delicate, with low detoxification ability and immunity, and is prone to pesticide damage.

After the jointing period, wheat enters the booting stage, which is very fragile, and at this time, it is very easy to produce pesticide damage with herbicides, especially 2methyl 4 chloride, which sometimes causes the wheat ears to be pumped out, or deformed, which seriously affects the final yield. Two don't: don't use wheat herbicides when the temperature is lower than 6 degrees herbicides in low temperature weather, the effect is not ideal, it is best to use the medicine at an average daily temperature of more than 6 degrees, and the weeding effect is good from 10 am to 3 pm.

Because weeds absorb light and grow vigorously, the stomata are open, and it is easy to absorb water and liquid medicine (the opposite is true for low temperatures), which can achieve a good weeding effect. Three don't: don't use wheat herbicides when the soil is relatively dry, we should seize the opportunity to water the wheat field and apply pesticides in time to ensure the effectiveness of herbicides.

Most herbicides require a certain amount of soil moisture to return to sail, and soil moisture is most conducive to the exertion of herbicide efficacy when it is 40%-60%. Four don't: don't use wheat herbicides in bad weather before and after heavy rain and before the arrival of cold air to use herbicides on one side of the world to affect the effect of weeding, on the other hand, it is very easy to cause pesticide damage, these are bad weather, especially in the 7 days before the spring cold can not use herbicides, winter medicine should pay more attention to the weather forecast.