Wheat weeding time, when is the right time to administer medicine

Weeding for wheat is generally chosen from turning green to before jointing, that is, from late February to mid-March. First of all, observe the local weather forecast before taking medicine, choose fine weather without rain, snow or strong wind, the daily average temperature is stable at 6 ℃-10 ℃, and apply medicine at 10:00 or 4 p.m., that is, after the dew dries in the morning or before dew condensation in the evening.

Wheat weeding time

You need to weed the grass after turning green to before jointing, that is, from late February to mid-March. Before taking medicine, you must first observe the local weather forecast. Choose sunny and fine weather without rain, snow or strong wind. The daily average temperature is stable at 6 ℃-10 ℃. Apply medicine at 10:00 or 4pm, that is, after dew dries in the morning or before dew condensation in the evening.

Second, how to choose herbicides

The main results are as follows: 1. The selection of herbicides depends on the types of main weeds in the field, such as Artemisia annua, shepherd's purse, mother-in-law, pig calamity, Niufan wisp, Maijia Gongze lacquer and other broad-leaved weeds. Benzenesulfuron + chlorofluoropyloxyacetic acid, 20% difluorosulfen, 7.5% difluorosulfen, 7.5% difluorosulfen, 5.8% azosulfen ·difluorosulfonamide.

2. In the wheat fields dominated by wild oats and grass weeds, such as azoline alkynyl ester, alkyne oxalic acid, oxazolyl, etc., and in the wheat fields dominated by Triticum aestivum and candle grass, methyl disulfuron, methyl iodosulfuron sodium salt and methyl disulfuron can be selected.

3. For the mixed wheat fields of Gramineae weeds and broad-leaved weeds, herbicides such as fluazosulfuron, picosulfuron or benzenesulfuron, chlorofluoropyloxyacetic acid and oxazolyl should be used according to a certain proportion. at the same time, in wheat fields dominated by brome in Monocotyledon weeds, sulfamethoxazole + special auxiliaries or fluazosulfuron can be selected.

4. The wheat fields dominated by Aegilops tauschii can choose methyl disulfuron + special auxiliaries, and wild oats can choose alkynyl ester or oxazolidin. The wheat fields dominated by Triticum aestivum can choose alkynyl ester or oxazolidin, acetylsulfonamide + special auxiliaries.

5. Water consumption per mu is 20-30kg, or according to the dilution concentration recommended in the product specification, no matter which herbicide product is selected, it should be used strictly in accordance with the recommended dosage and method on the product label. It is not allowed to increase or decrease the dose at will, and should not be mixed with organophosphorus pesticides and other products.

6. To avoid drug damage or affect the effect of weeding, it may also harm the growth of the next crop. Long residual herbicides such as chlorosulfuron and metsulfuron should not be used. At the same time, herbicides should be applied to wheat to return to green fertilizer at least 7 days later. If there is drought or poor soil moisture in wheat.

7. it is necessary to pour back green water first, and then apply medicine, there can be no stagnant water in the field, before hitting the herbicide, the agent needs to be diluted twice and mixed evenly, and the sprayer needs to choose an electric sprayer with good performance, and the spray should be fine and uniform. Do not re-spray or leak spray.