In 2017, all the herbicide manufacturers are gearing up, picking up their sleeves and refueling, and want to take a share in the huge weeding market after the paraquat is banned. The glufosinate cake looks very big and delicious. If you don't master the technology and blindly promote it, glufosinate can sometimes become a tricky rose.
1. The herbicidal mechanism of glufosinate
Glufosinate is a broad-spectrum contact herbicide, which has a certain systemic action. Glufosinate uses glutamine synthetase as a target enzyme. By inhibiting the activity of glutamine synthetase, it causes disturbance of nitrogen metabolism in plants, and excessive accumulation of ammonia leads to disintegration of chloroplasts and destruction of photosynthesis of plants, and achieves herbicidal effects.
After weeds absorb glufosinate, glufosinate can be transported in the xylem of plants through plant transpiration. After normal temperature for 3 days - 5 days, the weeds gradually become yellow and necrotic, and the effect period is up to 30 days.
Second, glufosinate is suitable for crop range
Glufosinate is mainly registered in non-cultivated land, papaya garden, rubber plantation, tea garden orchard, vegetable land, etc., for annual and perennial grasses and broadleaf weeds and sedges (remarks: sedge grass is small, the effect is better) Have better control effects, such as rat tail, Mai Niang, Matang, Pelican, foxtail, wild wheat, wild corn, Dactylis, Fescue, Quercus, Grass, Ryegrass, Reed, Bluegrass, Wild Oatmeal, brome, small canopy, etc.
Third, the amount of glufosinate
The problem of the amount of glufosinate, 200 g / liter of glufosinate, in the last July, I have done experiments. The experimental results show that for ordinary weeds, a bucket of water (capacity 15KG) dosage of 100ml--120ml, the effect is very good; but for some resistant weeds, such as: reed, white mulberry and other perennial weeds, a bucket of water (capacity 15KG) The dosage can reach more than 200ml, in order to have better grass killing effect and the cost is somewhat high.
Can glufosinate be used for weeding after corn seedlings?
Glufosinate can be used for weeding after corn seedlings, but the medication is strict. After the corn seedlings are weeded in the row, in the corn 10 leaves, when the weather is no wind or breeze, the spray head is sprayed with a directional spray, and does not drift to the corn. Although the systemic effect of glufosinate is not strong, there is still a certain internal Suction, need to pay attention to the occurrence of drift phytotoxicity.
5. What are the advantages of glufosinate?
1. Good safety: glufosinate mainly kills grass by contact, has poor systemic absorption, is safe and efficient, and is also suitable for shallow root crops, such as vineyards and tea gardens.
2. Quick-acting, long-lasting effect: Under normal weather conditions, after the application of glufosinate, the weeds will be yellowed in 2--3 days and gradually die; the duration of effect is about 30 days.
3. Maintain water and soil: Because glufosinate does not kill roots, it is conducive to the maintenance of water and soil, and the field is not easy to collapse.
4. The herbicide spectrum is broader: glufosinate has a good herbicidal effect on some resistant weeds, such as: small canopy.
6. Why is glufosinate sometimes not good for weeding?
The herbicidal effect of glufosinate is mainly affected by three factors: humidity, temperature and light.
The effect of humidity: the climate is dry, the plants in order to reduce transpiration, close the pores, leaf curl, leaf skin thickening, is not conducive to the absorption of glufosinate, affecting the efficacy; air humid, plant surface wax layer remains wet, open pores It enhances the absorption of glufosinate by plants and facilitates the exertion of the drug.
Temperature: Under low temperature conditions, the ability of glufosinate to pass through the stratum corneum and cell membrane is reduced, thereby affecting the herbicidal effect. With the increase of temperature, the herbicidal effect of glufosinate increases. It is recommended to use the temperature above 15 degrees Celsius, and the low temperature effect is not good.
Illumination: When the light conditions are good, the transpiration of plants is strong, which is beneficial to the efficacy of glufosinate.
7. How to use glufosinate more efficiently?
1. Weeding of wasteland: Some glyphosate can be added appropriately, and the rebound of weeds is obviously reduced. I have done experiments according to customer's suggestion. A bucket of water (capacity 15KG) is added with 88% of glyphosate ammonium salt soluble granules. The effect is not bad. As for the specific dosage, it can be small according to the local weed conditions. experiment.
2. For some weeds with broadleaf-based conditions, such as: purslane, etc., 20% acesulfame can be added to further expand the herbicidal spectrum.
3. Since glufosinate is mainly used in contact, when spraying glufosinate, it must be sprayed and sprayed evenly. It is also possible to add penetrant such as silicone. The surface of weed leaves is fully contacted and absorbed with glufosinate to reach Good grass killing effect.
4. When diluting glufosinate, do not use turbid river water to prevent reducing the efficacy.
In short, glufosinate as a good product, how to properly use glufosinate, more efficient use of glufosinate performance, is the top priority in the promotion of glufosinate, technology promotion is worthy of attention.
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