The "eight no, two must" principle used by wheat herbicides is worth collecting!
Before and after the cold dew, the winter wheat in the north should be planted. With the start of wheat planting, the wheat herbicide should also be used. How to use herbicides in wheat weeding? Today, we must introduce the use of wheat herbicides. The "eight no, two must", I hope to help everyone.
Do not use: Do not use herbicides before and after 4th wheat.
Before the 4-leaf stage, the wheat was delicate, the detoxification ability and immunity were low, and it was easy to cause phytotoxicity. After the jointing period, the wheat enters the booting stage and is very fragile. At this time, it is very easy to produce phytotoxicity with herbicides, especially 2 to 4 chlorine, which sometimes causes the wheat ears to be unable to be extracted, or deformed, which seriously affects the final yield.
Second, don't use wheat herbicides at temperatures below 6 degrees.
The herbicide is not ideal in low temperature weather. It is best to use the drug at a daily average temperature of 6 degrees or above. The weeding effect is good from 10 am to 3 pm. Due to the strong growth of weeds absorbed by the weeds, the pores are open, and it is easy to absorb water and liquid (the opposite is true), which can achieve good herbicidal effect.
Three Do not: Soil drought, do not use wheat herbicide
When the wheat planting soil is dry, it is necessary to grasp the timing of watering the wheat field and apply the medicine in time to ensure the herbicide. Most herbicides play a role in combining certain soil moisture, and are most beneficial to the efficacy of herbicides at 40%-60%.
Four Do not: Do not use wheat herbicides in bad weather.
The use of herbicides before and after heavy rain and before the arrival of cold air affects the weeding effect on the one hand, and it is easy to cause phytotoxicity on the other hand. These are all bad weather, especially in the 7 days before the cold spring, the herbicides cannot be used, and the winter medication should pay more attention. Weather forecast.
Five Do not: Do not re-spray or miss spray wheat herbicide
The herbicide must be evenly sprayed. If the weeds are not evenly distributed in the place where the spray is sprayed or sprayed less, the control effect is definitely not good. Remember not to re-spray, the wheat is prone to yellowing, and it is easy to cause herbicide damage.
Six Do not: Wheat herbicides should not be mixed with other herbicides, pesticides, and foliar fertilizers to avoid phytotoxic reactions.
Seven Do not: Do not hit wheat herbicides for 7 days before and after use of organophosphorus and carbamate pesticides.
It takes at least 3-5 days for the wheat field to pass through such insecticides in order to use the herbicide, otherwise it will easily cause the yellowing of the wheat to burn, because the organophosphorus pesticides reduce the ability of the wheat to degrade the herbicide, followed by The use of herbicides can easily lead to phytotoxicity.
Eight Do not: Do not increase or decrease the amount of wheat herbicide
According to the wheat herbicide instructions, reducing the dose does not achieve the purpose of weeding, increasing the dose is very likely to cause phytotoxicity.
One must: the use of wheat herbicide must use the second dilution method
For wheat herbicides, we must pay attention to the second dilution. Some farmers have to directly introduce the herbicide into the sprayer and then stir it. In fact, this method of medicine must not be scientific. When we are redeeming the drug, we must first dilute a small amount of water into a mother liquor, then add the prepared mother liquor first in the barrel, then make up the remaining amount of water and mix it.
Second must: timely maintenance of the medical equipment before application
It is necessary to maintain the medical equipment to prevent run, run, drip and leak during the application process and achieve uniform application. The medicine after application should be cleaned promptly and thoroughly to avoid phytotoxicity to other crops.
The above is the introduction of wheat weeding "eight do not, two must". For wheat weeding, we must seize the opportunity, combine various considerations, timely use of drugs, lay the foundation for the growth of wheat and high yield in the later period, I hope the content of Xiaobian introduction Can help the majority of growers.
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