How to choose corn field herbicide

First, before seeding

(1) When there is no weed in the field, it can be closed. Commonly used medicines: 40% isopropyl grass·莠250-300 g/mu; 40% acetaminophen 200-250 g/mu; 40% Ding·莠200-250 g/mu; 52% isopropyl grass·莠200-250 g/mu; 60% isopropyl grass·莠180-230 g/mu; 40% methyl acetate 200-250 g/mu. (2) After the wheat is harvested, the field with more weeds per year in the field adopts mixed technology and implements “one-to-one kill”: 40% isopropyl grass·莠200-250 g+20% paraquat 150-200 g/ Mu; 52% isopropyl grass·莠150-200 g+20% paraquat 150-200 g/mu. (3) After the wheat is harvested, the fields with more perennial weeds in the field are mixed and used to implement “one-to-one kill”: 40% isopropyl grass·莠200-250 g+41% glyphosate isopropylamine salt 250 -300 g/mu; 52% isopropyl grass·莠150-200 g+41% glyphosate isopropylamine salt 250-300 g/mu.

Second, the corn growth period

(1) Before the weeds of corn 1-3 leaf stage are unearthed to the weeds 1-2 leaf stage, commonly used medicinal agents: 40% Yufeng (isopropyl grass·莠) 250-300 ml/mu; 40% jade multi-received Propylene·莠) 250-300 ml/mu; 52% Xiyangyang (isopropyl grass·莠) 200-250 ml/mu; 60% Yujia (isopropyl grass·莠) 180-230 ml/mu.

(2) Corn 3-5 leaf stage is an important period for weed control in corn fields. If weeds are not prevented in time, it will directly affect the growth and yield of corn. Corn 3-5 leaf stage, grass weed 2-5 leaves, broadleaf weeds 3-5 cm high. Commonly used pharmacy: 4% nicosulfuron suspending agent 100-120 ml / mu; 40% Jin Yufeng (nicarsulfuron) suspending agent 100-120 ml / mu; 53% jade sweet (nicotinic acid to Tianjin) 90- 105 g / mu. (3) The 3-4 leaf stage of the corn, the plot with more aconite in the field. Commonly used medicines: 40% happy things (smoke to Tianjin) 80-100 ml +56% sodium dimethyltetrachloride 50-60 g / mu; 4% nicosulfuron 100 ml / acre + 56% sodium tetrachlorotetrachloride 50-60 g/mu; 56% sodium dimethyltetrachloride 60-80 g/mu; 48% bentazone 150-200 ml/mu; 4% nicosulfuron 120-150 ml/mu.

(4) There are more weeds in the 5-6 leaf stage of corn, you can choose 40% happy things (smoke to Tianjin) 120-150 ml / mu; 40% Jin Yufeng (nicarsulfuron) 120-150 ml / Mu; 40% fate (sulphur grass to Tatsujin) 250-300 ml / mu; 40% happy things (smoke to Tianjin) 80-100 ml +56% sodium dimethyltetrachloride 50-60 g / mu; 40% Fate (sulphuric acid to detoxification) 100-150 ml +40% happy more than 80-100 ml / mu.

(5) Maize 5-7 leaf stage fragrant aconite, field convolvulus, small carp, gray cabbage and other weeds with more plots, can be applied 56% sodium dimethyltetrachloride sodium soluble powder 80-100 g / mu; 48 % oxalopine 200-250 ml / mu; 40% happy matter (smoke to Tianjin) 80-100 ml +56% sodium dimethyltetrachloride 50-60 g / mu. (6) After corn 8-10 leaves (plant height 80 cm), there are more weeds in the ground, and spray 20% paraquat water agent 150-200 ml/mu. If the field weeds are sparse, use a combined herbicide, such as 40% isopropyl grass·莠150-200 ml+20% paraquat 200 ml/mu.

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