How to choose herbicides in Maize sowing period

How to select herbicides in corn sowing time? Please guide the occurrence of weeds in corn fields. Among them, Huang-Huai-Hai region is the largest corn producing area in China, which is mainly sown in summer. The crops in this area are planted twice a year, mostly corn and wheat rotation, as well as corn, soybean, peanut and other intercropping. The main weeds in this area are Codonopsis grossedentata, Portulaca oleracea, Euphorbia angustifolia, Chenopodium quinoa, Thrush grass, aconite and so on. The occurrence area of grass damage in corn field accounts for 82%-96% of the planting area, of which 66% is moderately harmful. Amide herbicides such as 72% Metolachlor (such as Jindule, Jindubao) and 90% Acetochlor (such as Fengxue, Fengdiao) can be selected during corn sowing period. Before sowing, it is best to seal the soil immediately after sowing, which can effectively prevent the germination of various annual Gramineae weeds. Thienesulfuron and azinone are herbicides with good sealing effect on broad-leaved weeds in front of maize seedlings, which can be used to block the germination of annual broad-leaved weeds. Atrazine can be used to control annual Gramineae weeds and broadleaf weeds in mixed fields of Gramineae weeds and broadleaf weeds, and its control effect on broadleaf weeds is better than that on Gramineae weeds. Atrazine can be used not only for pre-seedling soil treatment after maize sowing, but also for post-seedling stem and leaf treatment, but because of its long effective period, if the amount of effective components per mu is more than 133 grams, wheat, soybean, millet and other sensitive crops can not be planted in the cold areas of the north. In order to improve the sealing effect of Gramineae weeds and reduce the dosage of atrazine, the mixed use of amide herbicides and atrazine is generally recommended. Its dosage is 220,250ml per mu, which has a good sealing effect on Gramineae weeds and broadleaf weeds, and is safe for the next crop. The following formula can also be used: 90% Acetochlor 40ml / mu plus 38% atrazine 75ml / mu, 72% Metolachlor 75ml / mu plus 38% atrazine 75ml / mu, 90% Acetochlor 40ml / mu or 72% Metolachlor 75ml / mu with 75% thiophensulfuron dry suspension 1.25g / mu. When using the herbicides of the above closed treatment, the low temperature during the application period, the uneven ground caused by stagnant water, too late application period and too large dosage may cause different degrees of drug damage. For example, the difference of soil moisture should be watered and then applied. Click to get more corn planting techniques click to get more herbicide application techniques click to get more pesticide application techniques