The latest selection method of herbicides in Corn Field

The main weeds in corn field are: Equisetum equisetifolia, Equisetum, Chenopodium, Amaranthus, amaranth, purslane, amaranth, abutilon, wild watermelon seedlings, solanum nigrum and other weeds. Perennial weeds include spiral flower, Reed, aconite and so on.

After sowing and before seedling

1. When there are no weeds in the field, the plot can be closed. Commonly used medicament: 40% isopromazine 250-300 g / mu, 40% atrazine 200-250 g / mu, 40% isopropene 200-250 g / mu, 52% isopropene 200-250 g / mu, 60% isopropene 180-230 g / mu, 40% atrazine 200-250 g / mu.

2. After wheat harvest, the fields with more annual weeds in the field adopt the mixed technology to carry out "one cover and one kill": 40% atrazine 200-250 g + 20% paraquat 150-200 g / mu, 52% paraquat 150-200 g + 20% paraquat 150-200 g / mu.

3. After wheat harvest, the fields with more perennial weeds in the field adopt the mixed technology to carry out "one cover and one kill": 40% Isopropene 200-250 g + 41% glyphosate isopropylamine 250-300 g / mu, 52% Isopropene 150-200 g + 41% glyphosate isopropylamine 250-300 g / mu.

Corn growing period

1, corn 1-3 leaf stage weeds unearthed to weeds 1-2 leaf stage, commonly used chemicals: 40% Yufeng (isopropyl grass atrains) 250-300 ml / mu, 40% jade overharvest (isopropyl grass atrains) 250-300 ml / mu, 52% Xi Yangyang (isopropyl grass atrains) 200-250 ml / mu, 60% Yujia (isopropyl grass atrains) 180-230 ml / mu.

2. The 3-5 leaf stage of maize is an important period for weed control in corn field. if weeds are not controlled in time, it will directly affect the growth and yield of maize. Corn 3-5 leaf stage, Gramineae weeds 2-5 leaves, broadleaf weeds 3-5 cm high. Commonly used agents: 4% nicosulfuron suspension 100-120 ml / mu, 40% Jin Yufeng (nicosulfuron) suspension 100-120 ml / mu, 53% Yutian (nicosulfuron atrazine) 90-105 g / mu.

3. In the 3-4 leaf stage of maize, there are more aconite in the field. Commonly used medicament: 40% Xizhiduo (atrazine) 80-100 ml + 56% dimethyltetrachlorosodium 50-60 g / mu, 4% nicotinosulfuron 100 ml / mu + 56% dimethyltetrachlorosodium 50-60 g / mu, 56% dimethyltetrachlorosodium 60-80 g / mu, 48% prednisone 150-200 ml / mu, 4% nicotinosulfuron 120-150 ml / mu.

4. Corn plots with more weeds in 5-6 leaf stage, you can choose 40% Xi Shi duo (tobacco atrazine) 120-150 ml / mu, 40% Jin Yufeng (nicosulfuron) 120-150 ml / mu, 40% fate (sulfonate atrazine) 250-300 ml / mu, 40% Xi Shi duo (smoke atrazine) 80-100 ml + 56% dimethyltetrachlorosodium 50-60 g / mu. 40% predestination (sulfonate atrazine) 100-150 ml + 40% Xi Shi duo 80-100 ml / mu.

5. In the plots with more weeds such as Cyperus roxburghii, Artemisia angustifolia, thistle and gray vegetables in the 5-7 leaf stage of corn, 56% dimethyl tetrachlorosodium salt soluble powder 80-100 g / mu, 48% prednisone 200-250 ml / mu, 40% Xi Shiduo (tobacco atrazine) 80-100 ml + 56% dimethyltetrachlorosodium 50-60 g / mu.

6. After 8-10 leaves of corn (plant height 80 cm), there are more weeds in the plot, and 20% paraquat is sprayed directionally between rows 150-200 ml / mu. If the field weeds are sparse, you can add closed herbicides, such as 40% atrazine 150-200 ml + 20% paraquat 200 ml / mu.