Selection of herbicides in corn fields

The main weeds in corn fields are: crabgrass, foxtail, golden foxtail, chloris, teff, goosegrass, valerian, medlar, cockroach, gray-green cockroach, hedgehog, terracotta, porch, and burrow , 剌苋, 反, 繁, 繁, 苋, 千, 苋, 苋, 腋, 葙, 马, 苋, 苘, wild watermelon seedlings, longan and other weeds. Perennial weeds include convolvulus, reed, and aconite.

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 pharmacy: 40% happy matter (smoke to Tianjin) 80-100 ml +56% sodium dimethyltetrachloride 50-60 g / mu; 4% nicosulfuron 100 ml / acre + 56% sodium dimethyltetrachloride 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.
Shanxi farmers report

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