With the steady rise of temperature, wheat will enter the green-back period one after another. At present, the age of weeds in wheat field is small, the overlapping cover of weeds by wheat is small, and the medicinal liquid is easy to spray through. This is the key period of weed remediation and control in wheat field. In order to ensure the control effect, ten points should be paid attention to when controlling weeds:
I. Pay attention to drug selection
In the wheat field with broad-leaved weeds as the dominant species, 10% tribaronone wettable powder or 75% trifon methyl dry suspension or 72%2,4-D butyl ester oil can be selected. The wheat grass with the grass weeds as the dominant species can be sprayed with 3.6% methyl two sulfonyl suspending agent. The broad leaf weeds mixed with grass weeds such as Aegilops and so on can be selected for 3.6. Methyl two sulfonamide + methyl iodisulfone sodium salt water dispersible granule spray.
2. Pay attention to the mixture of pesticides
Scientific mixing of pesticides has twice the result with half the effort, but improper mixing often leads to pesticide damage. Therefore, before mixing up, it is necessary to consult relevant technical personnel and not to mix up privately.
3. Pay attention to the concentration of liquid medicine
The concentration of herbicides should be formulated strictly in accordance with the specifications for the use of herbicides, and the concentration of herbicides should not be reduced or increased at will.
IV. Pay attention to the amount of liquid
Taking conventional sprayers as an example, the liquid volume of Mu should be controlled at 30~40 kg, at least not less than 30 kg.
5. Pay attention to the method of dispensing
No matter what kind of herbicides, they should be formulated scientifically according to the amount of water per mu and the amount of water per mu. The mother liquor should be prepared first, and then diluted twice. No water can be added directly into the cartridge.
6. Pay attention to the period of spraying
Spring is a supplementary period for chemical weeding of wheat. Generally, the best period for chemical weeding is the turning green and jointing of wheat. Early control is ineffective, and late control is prone to drug damage.
7. Pay attention to the timing of spraying
Choose sunny days, no wind, daytime temperature stable above 10 C and no frost and heavy rain within 4 days, spraying time is suitable for 10 to 17 o'clock.
VIII. Pay attention to the choice of drugs and instruments
Three points should be paid attention to when choosing chemical herbicides in wheat field in spring: one is not to use the herbicides sprayed with sterile herbicides; the other is not to use the medicines with serious leakage; and the third is not to use the medicines with poor atomization.
9. Attention to Weather Conditions
Drugs should not be used in windy weather to avoid the drift of medicinal liquid and to cause drug damage to sensitive crops nearby. Drugs should not be used when the temperature is too high or the cold wave is approaching, so as to avoid drug damage to wheat seedlings themselves.
10. Pay attention to watering time after medication
The wheat field should not be flooded with water within 5 days after the application of pesticide in order to avoid pesticide damage.
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