How to properly spray herbicides and growth control agents when planting wheat?

The application of herbicides to wheat needs to pay attention to the time of application, generally speaking, it is necessary to apply herbicides to wheat before the year, preferably before frost. Since the wheat is not very high at this time, it is more convenient to spray the drug. The grass at this stage does not look very large, it is particularly sensitive to drugs, it is weak resistance, only a very small amount of herbicides can be used to solve all the weeds, and the cost of spraying is reduced.

When using herbicides, the application of sprayers is inevitable, and when choosing a sprayer, you should choose the right one for yourself, and at the same time, the nozzle of the sprayer should be prepared, and you can try it after preparation, and the sprayed drug is symmetrical and low and fine as the standard. Secondly, in the case of spraying, it is necessary to see whether the sprayer will leak or drip, and if such a thing happens, it should be repaired in time.

If the wheat is applied too early, the wheat will stop growing, so that it will suffer great harm in the middle and late stages, and the production of heading will suffer great harm first. At the same time, the stalk of wheat will continue to expand, and the seedling situation will occur in the middle and late stages of wheat. The application of wheat growth control agent should adjust the dosage, if the drug is too small, it is not so good, but if too much, wheat is very easy to cause fertilizer damage, for example, wheat will stop growing, which is particularly harmful to production.

Wheat herbicide selection issues. There are many types of weeds in wheat fields, such as sedge family type weeds, wild wheat, kanniang wheat and other long-slender leaf weeds, and naturally there are broad-leaved plant weeds such as chrysanthemum, pig seedlings, tribulus terrestris, etc., most of these two types of weeds are included in the wheat field weeds, and the herbicide types of these two types of weeds are quite different, <>

Therefore, wheat field hoeing should integrate local wheat field grass species as much as possible, and effectively select herbicide types, such as methyldisulfuron-methyl in the sedge family is relatively safe and stable, and azoleone is used for broad-leaved plants. Regarding the use time, amount, method and other common problems of herbicides in wheat, pesticide packaging is indicated, and the key indication here is that herbicides belong to alkaline pesticides, although they are selective, but they still have an inhibitory effect on wheat that cannot be eliminated. In particular, 2 4 drops of butyl ester are used in large quantities, which will mess up the metabolism of wheat, produce disorderly ears and exposed particles, and endanger the production volume.

Because herbicides are classified as alkaline pesticides, they cannot be mixed with acidic and alkaline fertilizers and agricultural fertilizers. Suppressant is a drug that inhibits the temporary growth and development of crops, which can promote the stalk between stems to be shorter and more stable, and improve the environmental conditions for plant photosynthesis and development of green plants, and finally achieve the goal of increasing yield. Wheat growth control agents include chlormequatin, uniconazole, arthrochlor, etc.

They all manipulate growth and development according to the inhibition of auxin production, in which booster is to manipulate growth and development by inhibiting cellular metabolism.

Wheat herbicides cannot be applied after jointing. Wheat herbicides are sprayed in time according to the development of wheat weeds, and the growth control agent is determined by the growth of wheat. The herbicide should not be used after jointing of wheat.

According to scientific and reasonable farming, weed control and growth control regulator should be sprayed separately.

Be sure to grasp the time of medication, but also pay attention to the use before the frost, pay attention to the position of spraying. Be sure to spray evenly.

To choose the right medicine to use, be sure to pay attention to the surrounding environment, do not use it when it rains, and do a good job of protecting yourself when using it.

Many growers know that wheat herbicides.

It is more sensitive to temperature, and if the temperature is too low, it will affect the effect of weeding, and second, it may cause pesticide damage, so everyone is more cautious when using it.

If it is wheat sown in early to mid-October, when the wheat grows to 3-5 leaves (the best period for wheat herbicide spraying), it is basically around early to mid-November, when the weather is high and the temperature is about 20 degrees, which is more conducive to the effect of herbicides.

And some farmers who sow late wait until the 3-5 leaf stage of wheat, which is in late November or December, and the weather at this time is a lot of winter wheat.

The planting area has cooled down, such as Henan, where the helper is located, the temperature is now between minus 1 degree and 7 degrees, and it is accompanied by light rain, in this case, it is obviously not suitable for wheat herbicides.

According to many years of planting experience, the temperature when spraying wheat herbicides should be greater than 10 degrees at noon, the higher the better (most winter wheat planting areas, the temperature during this period will not appear more than 30 degrees of high temperature, you can rest assured), if you want to look at the average temperature, the average temperature of the day should be greater than 6 degrees or more than 8 degrees, and the higher the better.

1. It is recommended to apply medicine in sunny weather, after 10 a.m. and before 15 p.m.

2. Choose windless weather to spray, one is to ensure the efficacy of herbicides, and the other is to avoid herbicide damage.

3. When spraying herbicides, pay attention to the change of temperature, because herbicides play a role, there needs to be a period of time, in order to ensure the effect of herbicides, spray herbicides to see the weather forecast.

No rain is best for a week.

4. When spraying herbicides, the liquid should be mixed evenly, and in the process of spraying, do not miss or re-spray to ensure the final weeding effect.

In fact, in the actual planting process, temperature is only one of the factors that affect the efficacy of herbicides, and there are a variety of reasons that jointly determine the final weeding effect, such as soil moisture, weed resistance, herbicide selection and so on.

Wheat weeding. After the wheat 3-leaf and heart-leaf period, the weeds in the wheat field are all out, the temperature is above 10 degrees, and the average daily temperature is not less than 5 degrees.

On the use of wheat herbicide temperature question, in fact, there is no accurate answer, one is because of different herbicide formulas, the reaction at different temperatures is different, the other is because the production process of different herbicide manufacturers is different, the small helper inquired about some relevant information, about the temperature when used, summarized as follows 3 points 1, some herbicides on the packaging, will be marked with the temperature when used, such as 2 degrees, 3 degrees, 5 degrees, etc., what does this temperature mean, the highest temperature, the lowest temperature, Or the average temperature, did not say clearly, but the little helper understands, in general, this temperature refers to the lowest temperature of the day, for example, pyridoxamin can control most of the broad-leaved weeds and sharp-leaved weeds in wheat fields, when using the formula, the minimum temperature can not be lower than 2 degrees, in addition to the temperature of the day, in 2 or 3 days after application, can no longer continue to cool, if it drops below 0 degrees, it can not be used.

The average daily temperature is lower than 8 degrees without herbicides, except for individual herbicides (diflusulam, more resistant to low temperature), general herbicides in low temperature weather, the effect is not ideal, it is best to use the medicine above the average daily temperature of 8 degrees, the higher the temperature, the better the weeding effect, because the weeds absorb light and grow vigorously, the stomata are open, easy to absorb water and liquid medicine (low temperature is the opposite), can achieve a good weeding effect.

Start with a timely detox. If the herbicide spraying dose is too large, it is necessary to spray water in time to remove leaf residues, reduce the herbicide content in wheat, and avoid soil drought at the same time. In addition to the effect of herbicide residues on crops in the previous season caused by wheat pesticide damage, when spraying herbicides in wheat in the field, if the pesticides are not properly selected, or the quality of the pesticides is not good, or the spraying period is not suitable, or the application dose is too large, or the pesticides are resprayed, or the mixed pesticides are improper, or the application equipment is improperly selected, if the herbicide damage of wheat before winter, brassinolide, treasure leaves, naphthalene acetic acid, potassium dihydrogen phosphate, gibberellin garlic, DA-6, and vitrin can be sprayed immediately to alleviate the damage; If it is a pesticide damage during the jointing stage of wheat regreening after the year, it can be remedied by spraying amino acids, treasure leaves, and potassium dihydrogen phosphate.

<>1.If you find that the wrong herbicide is used in time, or the concentration is too large, spray more water immediately to dilute it, which may be effective. 2.

After dilution with water, foliar fertilizer can be sprayed. Pyridine herbicides, we also use more in the production process, and they are more toxic to humans. It is generally used in orchards, mulberry orchards, tea plantations, etc., such as paraquat, which we used in the past, to be treated with herbicides.

Timely watering, if it is found that the leaf tip of the wheat is dry after the use of herbicides, the leaves are yellow and wilting, whitish and other phenomena, irrigation measures should be taken immediately, so that the effect of diluting the pesticide residue and reducing the soil content can effectively reduce the harm of pesticide residues to wheat. In addition, some growth regulators sold on the market are said to be able to cure the harm, how to say this, you can try it, according to the dosage they say, if it can save the best, if it can't be saved, then there is no trick, this depends on the individual.

It is necessary to rinse quickly and repeatedly with clean water, so that the concentration of pesticides can be absorbed, and for alkaline replication and decomposition of herbicides, quicklime can be used for spraying.

Farmers should dilute the herbicide with water and make the herbicide a little lower before spraying, which can reduce the damage.

It is necessary to detoxify immediately, and also spray water to reduce the content of herbicides, and also to replenish the soil with some water.

Farmers should reduce herbicides and pull weeds by hand, which is good for wheat and can also get high yields, which is very good.

The best thing to do is to buy a wheat-specific herbicide that will not cause damage to the wheat.

When it comes to spraying herbicides, many farmers are worried about poor weeding effects and pesticide damage. It is a good time to spray herbicides in wheat fields, weeds in the wheat field are in the seedling stage, the roots are small, the leaves are tender, and the wheat is small, and the weeds will not be blocked, so the effect of spraying herbicides is better.

Because of late sowing, the wheat seedlings in many plots are small, and the temperature drops early, and the temperature changes greatly, resulting in unsatisfactory effects after spraying herbicides. Some farmers asked whether foliar fertilizer would improve the weeding effect if foliar fertilizer was added when spraying herbicides on wheat, and it could also save labor and not miss the best time for weeding.

Spraying foliar fertilizer before winter can promote the growth of seedlings, improve cold resistance, and ensure the safety of seedlings in winter. Some farmers believe that adding foliar fertilizer to herbicides can improve the weeding effect, because the activity of weeds is improved, and the herbicides absorbed are more, and weeds will naturally die, such as adding potassium dihydrogen phosphate and brassin. When spraying herbicides, it is not recommended for farmers to add any foliar fertilizer, which will aggravate the occurrence of pesticide damage.

There are several reasons for this:

1. There are broad-leaved weeds in wheat fields before winter, as well as gramineous weeds that grow at the same time as wheat, and the seedlings are similar in size and are not easy to distinguish. When we spray herbicides, we require uniform spraying, and the main target is weeds on the ground. Foliar fertilizer is added to herbicides, which has a certain effect on weeding.

However, when spraying in the whole field, it also has a certain impact on the growth of wheat seedlings. While we weed, we can't hurt the wheat seedlings, so it is not recommended to mix them.

2. When spraying herbicides on wheat, sufficient water consumption is required to have a good weeding effect. If you add foliar fertilizer, or increase yield, it is difficult to mix the liquid medicine evenly, and some places spray with a large concentration, which is easy to have pesticide damage, and some have a small concentration and poor weeding effect. In order to ensure the effectiveness of weeding, it is recommended that the herbicide be sprayed separately.

If mixed with different herbicides, be sure to use them correctly!

3. The growth of wheat seedlings in some plots is weak, and there are yellowing and dry tips. Some farmers are thinking of spraying herbicides and foliar fertilizers, which can not only control weeds but also promote the growth of seedlings. In this case, it is advisable to postpone the use of herbicides, spray foliar fertilizer first, cultivate strong seedlings, and then spray herbicides.

If it is sprayed directly, the wheat seedlings with weak resistance are prone to pesticide damage.

When the wheat seedlings grow normally, it is recommended to weed first, because the herbicide has temperature requirements, and when the average daily temperature is lower than 10, it can only be used after the year. So, weeding first, then spraying foliar fertilizer, or increasing yields**. Herbicides are also not recommended to be mixed with fungicides and insecticides.

When pests and diseases are severe, the use of herbicides should also be postponed.