The time and temperature of weeding wheat, when to administer the medicine is good.

Weeding can be carried out in the wheat seedling stage, in the middle and last ten days of November, or in the wheat turning green period, from late February to early March, generally when the average temperature is higher than 6 ℃, and according to the types of weeds, the corresponding herbicides are selected for control. At the same time, it should be reasonably matched with good dosage, such as wheat fields dominated by brome, 70% fluazosulfuron water dispersible granules can be used, and the dosage is 3 grams per mu.

Time for weeding of wheat

The main results are as follows: 1. in the wheat seedling stage, in the middle and last ten days of November, it is the key period of weeding, when the grass age is relatively small, and the resistance to drugs is relatively small, so it is easier to control.

2. In the period of wheat returning to green, from late February to early March, it is also a better time to weed, but at this time, the age of weeds is older, and the drug resistance is also stronger. when controlling, it is necessary to increase the dosage, but it is easy to cause drug damage. therefore, special attention should be paid to the dosage when using medicine.

Second, the temperature of wheat medication

1. When weeding wheat, it is necessary to observe the air temperature and humidity. The average temperature should be higher than 6 ℃, and it is more appropriate from 10:00 to 3 pm. When the soil is relatively dry, it is necessary to increase water consumption. Stagnant water should not occur during this period, which will affect the efficacy of herbicides.

2. Generally spray herbicides according to the recommended dosage, and do not increase or decrease the dosage casually to ensure its efficacy and prevent the occurrence of drug damage. When several herbicides are mixed and used, the dilution method should be adopted twice. The herbicide can be diluted with a small amount of water to form a mother liquid, and then dissolve the mother liquid into the prescribed amount.

3. During this period, the mixed drugs should not be parked for a long time and need to be used up once. Suitable weather can be selected for application, which can reduce the volatilization of medicine. It is not suitable to apply medicine when the temperature is below 10 ℃. It is necessary to maintain the spraying equipment in the later stage.

4. the equipment of medicine should be checked in time before application to avoid the phenomena of emitting, dripping and leakage in the process of application, evenly apply the medicine, do a good job of safety protection, prohibit smoking and diet, and avoid poisoning.

III. Suitable medications and formulations

1. The corresponding herbicides can be selected according to the types of weeds. When there is only one kind of wheat weeds, you can choose to use a single herbicide to control. When there are several weeds, such as the mixture of Monocotyledon weeds and dicotyledonous weeds, several herbicides can be mixed in proportion, which is helpful to expand the weed control efforts and improve the weed control effect.

2. 75% benzosulfuron water dispersible granules can be used in wheat fields dominated by broad-leaved weeds such as shepherd's purse, humus, ionic grass, Mai Jiagong, quinoa, etc., with a dosage of 1g per mu, or 10% of benzosulfuron-methyl wettable powder, 10g per mu.

3. 20% chlorofluoropyloxyacetic acid EC can be used in wheat fields dominated by Dawanhua, and the dosage per mu is 65ml.

4. 70% fluazosulfuron water dispersible granules can be used in wheat fields where brome occurs, and the dosage is 3G per mu.

5. 10.8% Fenazol EC can be used in wheat fields with the main occurrence of perilla, the dosage per mu is 35ml, or 15% alkynyl ester wettable powder, the dosage per mu is 35g.

6. Wheat fields with brome and broad-leaved weeds were mixed with 70% fluazosulfuron water dispersible granule 3G and 10% benzenesulfuron wettable powder 10g per mu.

7. The above formula needs to be mixed with water about 35kg per mu, generally using hand pressure sprayer or spray car to spray evenly.