There are many weeds in the wheat field. When and how to weed?

Weeds in wheat field compete for glory and fertilizer, which is an important factor affecting wheat high yield. In the winter wheat field of paddy-upland rotation in Jianghuai basin, the weed base is large, so the strategy of "one seal and one kill" is generally adopted. The effect of soil sealing and weeding is poor in the dry land rotation of winter wheat fields in the Yellow River Basin, so the strategy of "one killing and one filling" is widely adopted. The soil in spring wheat planting area is generally dry, and the effect of soil sealing is poor. After harvesting seedlings, the strategy of "killing one and replenishing one" is generally adopted.

Generally speaking, there are two application nodes of herbicides in wheat field, one is winter (65438+early February-65438+1late October); The other is spring (from late February to early March), and the weeding effect in winter and spring varies from region to region. However, farmers who haven't weeded the stems and leaves of wheat fields in the new winter should hurry up now!

Herbicide selection

In Japan, oxazoline, clomazone, cyhalofop-methyl, cyhalofop-methyl, clomazone, fenoxaprop-p-ethyl and their mixtures were selected to control Kanye and Kanye. Selecting a compound preparation of methyl disulfonate and isoproturon to control tobacco and hard grass; Fluroxypyr, bentazone, tribenuron-methyl, fluroxypyr, fluroxypyr and their mixtures are used to control broad-leaved weeds, such as pig seedlings and chickweed.

Selecting methyl disulfonate to control Aegilops tauschii;

Bromate was controlled by sulfuron-methyl, sulfuron-methyl and their compound preparations. Selectors such as oxazoline and propargyl and their composite preparations such as wild oats and Lolium multiflorum; Diclofenac, 2- methyl -4- chloro-sodium, fluroxypyr, oxadiazole, oxadiazole and their mixture are used for preventing and treating offspring and shepherd's purse.

Matters needing attention

1. Combine and compound chemicals according to the weed situation in the field;

2. Pay attention to the weeding time, as far as possible after the weeds come out and before the four-leaf period of weeds;

3. When weeding, the temperature should be above 6℃ and the weeding time should be 10 from morning to 3 pm;

4. Pay attention to the soil moisture in the field. The soil should not be too dry or too wet.

Don't spray herbicides on other crops nearby to prevent phytotoxicity and unnecessary losses. Wear a mask when spraying, don't expose your skin, don't smoke and drink, clean your body in time after spraying, and clean the sprayer repeatedly to prevent any harm to other crops.