Etarfolatide (Acetochlor) is a widely used herbicide. It was developed in 1971. It is one of the most important herbicide varieties in the world. Etarfolatide has the advantages of high herbicidal activity, wide application range, safety to crops, easy application conditions, stable product quality, and low price. It is widely used in the pre-emergence control of weeds in dry fields, such as the herbicide acetochlor, the emulsifiable concentrate can be absorbed by weed shoots and roots, inhibiting its protein synthesis and killing it.
The main application of Etarfolatide
Etarfolatide is one of the most active varieties of amide herbicides. It has a significant control effect on annual grass weeds and can also remove part of the crocodile grass. Acetochlor single agent is mainly used in dry land, and its compound preparation is used in large quantities and safely in paddy fields. Acetochlor is a highly effective early-field selective pre-emergence herbicide used before weeds are unearthed after planting crops. It is suitable for soybean, corn, peanut, cotton, potato, sunflower, rape, sesame, radish, sugarcane and other agricultural crops. It can also be used in orchards and other legume, cruciferous, solanaceous, asteraceae and umbelliferous crops, which can control annual undergraduate weeds and some dicotyledonous weeds.
Butachlor (2-chloro-N-(2,6-diethylphenyl)-N-(butoxymethyl)acetamide) is a selective pre-emergent herbicide. It is mainly used to control annual grass weeds and some broad-leaved weeds in direct seeding or transplanting rice fields. It is also selective for wheat, barley, sugar beet, cotton, peanut and cabbage crops. The effective dose is 1.0-4.5kg per hectare (active ingredient). It is generally used for soil surface treatment before bud, and can also be used after paddy field seedlings. It is an important variety of herbicides in rice fields.
Pharmaceutical properties of Butachlor
Butachlor is an amide selective systemic conduction herbicide. The pure product is a light yellow oily liquid with a slight aroma. It is difficult to dissolve in water and soluble in many organic solvents. It is stable under normal temperature, neutral and weak alkaline conditions. Strong acid will accelerate its decomposition and can be degraded in soil. Low toxicity to humans and animals, irritating to skin and eyes, and highly toxic to fish. Butachlor is mainly absorbed through the shoots of weeds, and then acts on the whole plant. Both pre-emergence and seedling stage can be used. After the plant absorbs butachlor, it inhibits and destroys proteases in the body, affects the formation of proteins, and inhibits the normal growth and development of weed shoots and roots, thereby killing the weeds. When used on clay loam and soil with high organic matter content, the agent can be absorbed by the soil colloid and is not easy to be leached. The special effect period can reach 1-2 months.
The difference between butachlor and acetochlor
1. Different physical and chemical properties
1). Acetochlor: pure product is light yellow liquid. The original medicine was dark red because of impurities. It’s stable in nature. Insoluble in water and organic solvents. The melting point is greater than 0°C, the vapor pressure is greater than 133.3 Pa, and the boiling point is greater than 200 degrees Celsius. It is not volatile and photolytic. At 30°C, the relative density with water is 1.11, and the solubility in water is 223 mg/L.
2). Butachlor: amber liquid with boiling point of 196℃ (66.7Pa). Insoluble in water, it can be mixed with acetone, benzene, ethanol, ethyl acetate and hexane. Decomposes at 275℃, stable at pH 7-10, stable to ultraviolet light.
2. Different control targets
1). acetochlor: annual grass weeds and some small-seed broad-leaved weeds. It has a special control effect on annual grass weeds such as bristlegrass, goosegrass, barnyard grass, maidenhair, bluegrass, hard grass, thrush, etc. It has a special control effect on the Chenopodiaceae, Amaranthaceae, Polygonaceae, Commelina communis etc. also have a certain control effect. However, the effect is worse than the gramineous weeds, and it is not effective for perennial weeds.
2). butachlor: applied in upland fields under wetting soil conditions. It can control annual grasses and some dicotyledonous barnyard grass, crabgrass, bristlegrass, oxgrass, rhododendron, knotweed, shaped sand, etc. It is suitable for cabbages, beans, radishes, cabbages, eggplants, Weeding spinach and other vegetable fields.
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