Note: These two times give the best wheat weeding effect!

The wheat seedling stage (mid-late November) and the greening stage (late February to early March) are the best time to control weeds in wheat fields.

It is a good choice to control weeds in the wheat seedling stage (mid-late November). At this time, the weeds are relatively small in age, and the resistance to the drugs is relatively small. It is relatively easy to control, and the dosage is not too large. Remove the weeds.

The greening period (from late February to early March) is also the best time to control weeds. However, at this time, weeds are older and have stronger resistance. In the prevention and treatment, it is necessary to increase the dosage. In addition, the cost of medication is increased invisibly. At the same time, there is a bit of a downside that it is easy to cause phytotoxicity, although it is said that this period can also control weeds in wheat fields, but pay special attention when applying drugs.

I would also like to remind you that wheat weeding should pay attention to weather temperature and humidity. When using medicine, the average temperature should be higher than 6 °C, and it is best from 10:00 am to 3:00 pm; if the soil is relatively dry, you should pay attention to increase The amount of water used, if there is water, will affect the efficacy of wheat herbicides .

Therefore, when applying wheat herbicides, it is necessary to seize the opportunity, consider in many ways, and timely use the medicine to lay the foundation for high yield of wheat.

Suitable herbicides and formulas

Herbicides selected for chemical weed control in wheat fields should be determined based on the main weed species and the herbicidal spectrum of the herbicide. When the weed species in the wheat field are in the same herbicide herbicide spectrum, a single herbicide can be used for control; when several weeds are mixed, such as the combination of dicotyledonous weeds and monocotyledonous weeds, several The herbicides are mixed and applied in a certain ratio to expand the herbicidal spectrum and enhance the herbicidal effect. In the following, several weeding formulations will be available for selection based on the type of weed community in Beijing wheat field.

For the wheat field dominated by broadleaf weeds such as wormwood, leeks, maijiagong, ion grass, yarrow, and alfalfa, 10% bensulfuron-methyl WP can be used, 10 g per acre, or 75% benzene sulfonate. Long water dispersible granules, 1 gram per acre.

For wheat fields dominated by buckwheat, 70% fluzolone-sulfonate water-dispersible granules can be used, and the dosage is 3 to 4 grams per acre.

For the wheat field based on bowls of flowers, 20% flufenoxyacetic acid emulsifiable concentrate can be used, and the dosage is 50-70 ml per mu.

To look at the wheat field dominated by maiden and valerian, use 10.8% thioxazole and emulsifiable concentrate, 30-40 ml per acre, or 15% acetylene WP wettable powder, 30-40 g per acre.

The wheat field mixed with brome and broadleaf weeds can be mixed with 10% fluzolsulfonate water dispersing granules 3~4g + 10% bensulfuron-methyl WP 10g per acre.

The above formula is 30-40 kg per acre, and is evenly sprayed by hand sprayer or sprayer.

Application requirements

Accurate medication: The herbicide should be sprayed according to the recommended dosage. It is forbidden to increase or decrease the dosage arbitrarily to ensure the control effect and prevent the occurrence of phytotoxicity.

With mixing: When several herbicides are used in combination, the second dilution method should be used, that is, the herbicide is first dissolved in a small amount of water to form a mother liquid, and then the mother liquid is diluted to a prescribed amount of the liquid. The mixed liquid cannot be parked for a long time and must be applied in one time.

Choose the right climatic conditions to apply: to reduce drift and evaporation, in addition, most herbicides are positive temperature coefficient agents, do not apply when the temperature is below 10 °C.

Do a good job in the maintenance of the application of the drug: before the application of the drug should be maintained in time to prevent the phenomenon of "run, run, drip, leak" in the process of application, to achieve uniform application.

Pay attention to safety: the pesticide application personnel should be safe and protective. During the operation, smoking and diet should be prohibited to prevent poisoning accidents.

More pesticide knowledge , please pay attention to China Pesticide Network

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