When to use herbicides in wheat fields?

Generally, you should fight before emergence.

After emergence: different chemical herbicides should be selected according to different seedling conditions of wheat and different subsequent crops of wheat, as follows:

1.6.9% Hummer rubber suspension or 10% Hummer emulsifiable concentrate. It can control a variety of monocotyledonous weeds. Spraying 40-80ml of 6.9% Xuma SC or 30-50ml of 10% Xuma EC and 30kg of water per mu. The suitable spraying time is 3 ~ 5 leaves of wheat.

Second, Baijia mixture. It can control a variety of broad-leaved weeds, especially those that are difficult to control, such as pig gizzard and Polygonum hydropiper. Use10 ~12ml of 48% paraquat dioxins per mu, add125 ~150ml of 20% dimethyl tetrachloride aqueous solution, and spray with 30kg of water. The spraying time is from the third leaf stage to the jointing stage of wheat. The mixture is only suitable for rice crops in the following crops.

Third, 75% superstar dry suspension concentrated solution. Can prevent and kill a variety of broad-leaved weeds. Use 1 ~ 2g per mu and spray 30kg. The suitable spraying time is 3 ~ 5 leaves of wheat.

4.20% chlorhexidine EC. It can control a variety of broad-leaved weeds, especially those difficult to control, such as small convolvulus. 60 ~ 100 ml per mu, spraying 20 kg of water. The suitable spraying time is 3 ~ 5 leaves of wheat.

Verb (abbreviation for verb) toluene mixture. Can prevent and kill a variety of broad-leaved weeds. 20% dimethyl tetrachlorohydrin 125ml, 48% bentazon 100ml, 30kg of water per mu, and the suitable spraying time is after tillering and before jointing. The mixture is only suitable for rice crops in the following crops.

In order to improve the effect of herbicide in controlling weeds in wheat fields, we should pay attention to the following points in the utilization of ecological environment: first, we should look at the soil moisture, increase the water when the moisture is insufficient, and temporarily do not apply pesticides when the moisture is insufficient; The second is to choose sunny weather to apply; Third, it should be applied at a temperature of about 20℃; Fourth, we should choose drugs in windless or breezy weather to prevent phytotoxicity to surrounding crops.

It is suggested that you can use pesticides and herbicides in wheat fields.