Wheat flour turns yellow in early spring. Can I spray herbicide?

In the past two days, with the increase of temperature, many wheat farmers in the north began to carry out chemical weeding for wheat in succession. However, when weeding, growers often have many questions. Today I will answer these questions one by one!

At what temperature can wheat be used as herbicide? In fact, it is too late to apply herbicides to wheat during the green period. We generally advocate chemical control and weeding in winter, when the grass is weak and easy to be eliminated. If herbicides are used in early spring, it is generally recommended that the average daily temperature be above 8 degrees Celsius, because if methyl disulfonate is used, the temperature will be too low and it will easily cause phytotoxicity.

What weather can wheat be used as a pesticide? When applying herbicides to wheat, we must consider the weather conditions. It doesn't mean that herbicides can be applied on sunny days, but the weather conditions within 3 to 5 days after herbicide application should be considered. If there will be obvious rain and snow weather after applying herbicides, then don't apply herbicides, because the bad weather in the later period will affect the effect and serious phytotoxicity will occur!

Spring wheat, herbicide or watering first? I suggest that growers manage according to the growth of wheat. If the field is particularly dry, it is recommended to water it first and then apply herbicides, because the dry environment is not conducive to the efficacy of herbicides. Many herbicides rely on systematic weeding, and the better the weeds grow, the better the weeding effect.

Of course, if the soil moisture in the field is good, then in spring, as long as the temperature is suitable, it is recommended to spray the medicine immediately, and the effect will be better earlier. You can water it after spraying the medicine for 5 to 7 days!

Can wheat be treated with herbicides and increase yield? Can wheat herbicide be combined with yield-increasing package? This question is often asked by wheat farmers in the north, and I'm here to tell you no.

When spraying pesticides, there are many kinds of herbicides. If five or six kinds of pesticides, disinfectants and nutritional regulators are added, the safety will not be guaranteed and the effect will be affected. I suggest using herbicides first, and then using the set meal to increase production.

Can wheat be used as herbicide together with potassium dihydrogen phosphate and brassin? Some friends want to add foliar fertilizer and brassinolide when they fight herbicides. I don't recommend this whole thing here. Herbicide first, then these foliar fertilizers and nutrition regulators!

Although herbicides are very effective in controlling weeds, they still do some harm to wheat. It's more scientific to apply nutrition regulator after herbicide application for about a week!

Can wheat turn yellow as a herbicide? In some wheat fields, in early spring, wheat seedlings turn yellow and grow weak. At this time, it is suggested to postpone the application of herbicides. To restore the growth of wheat, water topdressing and foliar nutrition adjustment should be carried out first. At this time, herbicides are not easy to cause phytotoxicity.

In addition, if the wheat field grows in general, it is estimated that many weeds have not germinated at this time, and the effect of applying pesticides at this time is definitely not good.

Can wheat be mixed with pesticides when using herbicides? Can wheat be mixed with pesticides when using herbicides? This is a question that many growers will ask. According to years of experience, pesticides can be used together, but the types are limited.

Organophosphorus pesticides, such as chlorpyrifos and phoxim, are not recommended to be mixed with herbicides; Carbamate insecticide carbofuran, etc. It is also not recommended to mix. The drug habit of most farmers is to use pyrethroid insecticides, such as bifenthrin. This method has been used for many years, and the safety is still ok. It is no problem to control early red spiders and aphids with pyrethroid insecticides!

When can the application of herbicides in wheat be postponed at the latest? In fact, it is too late to spray herbicides on wheat after last year. We generally advocate chemical control and weeding in winter, and start after four leaves of wheat.

Spraying herbicides in early spring should be completed before the jointing stage of wheat. If it exceeds the jointing stage, the effect is not good and it is easy to cause phytotoxicity!

Wheat has diseases, should we treat them first or use herbicides first? If wheat has suffered from obvious freezing injury or even sheath blight in early spring wheat management, spraying herbicides must be postponed at this time, because the resistance of wheat to herbicides is relatively poor at this time, and phytotoxicity may occur after spraying.