Pesticide and herbicide A brief analysis of Sethoxydim
What is Sethoxydim (74051-80-2)?
Sethoxydim is an oxime herbicide with a molecular formula of C17H29NO3S. Cas 74051-80-2 is a mitosis inhibitor. It is highly active against almost all grassy weeds and is ineffective and safe against broadleaf weeds.
Sethoxydim is a herbicide with systemic conductivity for stem and leaf treatment. It is widely used in broad-leaf crop fields such as soybeans, peanuts, cotton, and rapeseed to control gramineous weeds. It has the advantages of safety, broad spectrum, high efficiency, and low toxicity. . The traditional dosage form of enprophide is 20% emulsifiable concentrate and 12.5% engine oil, which contains a large amount of organic solvents such as toluene, xylene, etc. After application, thousands of tons of organic solvents are discharged into nature every year, causing waste of resources and pollution of the ecological environment.
Main dosage forms of Sethoxydim (74051-80-2)
20% emulsifiable concentrate, 12.5% engine oil emulsion, products containing engine oil can significantly improve the efficacy, usually reducing the dosage of active ingredients by 25%.
Characteristics of Sethoxydim (74051-80-2)
The pure product of the herbicide Sethoxydim is an oily, odorless liquid with a relative density of 1.043 (25℃), a boiling point >90℃/3x10-5mmHg, and a vapor pressure <0.013mPa. Partition coefficient KowlogP = 4.51 (pH 5). Solubility in water (mg/L, 20℃): 25 (pH 4), 4700 (pH 7). It is miscible with organic solvents such as methanol, hexane, ethyl acetate, toluene, octanol, xylene, olive oil and other organic solvents. The solubility is >1kg/kg (25℃). Stability: DT50 = 5.5d under the conditions of pH 8.7, 25℃, 10mg/L concentration and 12h/d (irradiated with helium lamp). DT50<ld in soil (15℃). Not miscible with inorganic or organic ketone compounds.
Toxicity and mechanism of action of Sethoxydim (74051-80-2)
The herbicide Sethoxydiml is of low toxicity. It mainly inhibits acetyl-CoA carboxylase and interferes with the synthesis of fatty acids, so weed death symptoms appear later.
Sethoxydim (74051-80-2) mode of action
The herbicide Sethoxydim is an ACCase inhibitor. Sethoxydim is a highly selective systemic conductive stem and leaf treatment agent that can be rapidly absorbed by the stems and leaves of grass weeds and conducted to the tips and internodal meristems, destroying their cell division. Necrosis begins at the growth point and internodal meristem. The treated plants stop growing after 3 days. The heart leaves are easy to pull out after 5 days. After 7 days, the new leaves fade or appear anthocyanin color, and the base turns brown and dies. After 10 to 15 days, the whole plant Withered.
Product Features of Sethoxydim (74051-80-2)
The herbicide Sethoxydim is an emulsifiable concentrate with a light brown or reddish brown liquid appearance, and the engine oil emulsion is a light brown or light yellow liquid with an appearance. It is an oxime herbicide with strong selectivity and strong conductivity for stem and leaf treatment. It is absorbed quickly by the stems and leaves of grass weeds and is transmitted to the leaf tips and internodal meristems to accumulate, destroying the ability of cell division and causing the growth points and nodes to The interstitial tissue becomes necrotic, and the treated plants stop growing 3 days after treatment. New leaves fade or appear blue-purple after 7 days, and the entire plant dies within 2 to 3 weeks. It decomposes quickly after being applied to the soil and becomes a stem and leaf treatment agent.
Application of Sethoxydim (74051-80-2) in vegetable production
The herbicide Sethoxydim is suitable for weeding fields of broad-leaf vegetable crops such as sugar beets, rapeseed, and potatoes. It is suitable for controlling annual grass weeds such as barnyard grass, crabgrass, wild oats, goosegrass, setaria, crotona, and steppegrass. Perennial grassy weeds such as bermuda grass, reeds and cogongrass are effective. All treated weeds will die within 14 to 21 days. It has no control effect on broadleaf weeds and is not effective on broadleaf crops. It has a short persistence period in the soil, and broadleaf crops can be sown on the same day of application.
① Treatment with 20% Sethoxydim EC. After diluting 20% EC with water, spray the weed stems and leaves evenly when the grass weed seedlings have 2 to 5 leaves. The dosage per acre varies depending on the type of vegetables. 25 days after eggplant sowing, when there are 10 leaves of grassy weeds, use 20% ethylpropethyl EC 20~25 ml to 50 kg of water; after the emergence of kidney beans, peas, cowpeas, broad beans, etc., use 20% EC 100~ 120 ml; in the fields of large (small) cabbage, cauliflower, mustard, celery, green (white) radish, carrots, etc., use 20% EC 100~125 ml to 37 kg of water; in the potato field, used to control annual grass weeds 20% EC 65~100 ml. To control perennial grass weeds, use 20% EC 200~400 ml and water 25~40 kg. In watermelon fields, if barnyard grass seedlings have 2~4 leaves, use 20% EC 67~100 ml, if barnyard grass has 6 to 7 leaves, use 133 ml of 20% EC and 30 to 40 kg of water; when a large number of weeds occur in the seedling stage of leek, the weeds should be removed manually first, and 20% EC should be used at the 3 to 4 leaf stage. 65~100g to 50kg of water, spray on the stems and leaves of weeds.
② Treatment with 12.5% Sethoxydim engine oil emulsion. The best application period is at the 3-5 leaf stage of gramineous weeds. Spray the weed stems and leaves evenly. The dosage per acre varies depending on the type of vegetables. When transplanting celery fields, when the grass weeds are in the 3 to 5 leaf stage, use 75 to 100 ml of 12.5% engine oil emulsion, add 30 to 40 kilograms of water, and spray on the stems and leaves of the weeds; in soybean fields to control annual grass weeds, For most weeds, use 65 ml of 12.5% engine oil emulsion at the 2-3 leaf stage, 100 ml at the 4-5 leaf stage, and 130 ml at the 6-7 leaf stage. Spray the stems and leaves with 30-40 liters of water; control annual grasses in rape fields. For undergraduate weeds, use 100 ml of 12.5% engine oil emulsion at the 2-3 leaf stage of most weeds, 110 ml at the 4-5 leaf stage, and 120 ml at the 6-7 leaf stage. Spray the stems and leaves with 30-40 liters of water for control. For perennial grass weeds, use 200-330 ml of 12.5% engine oil emulsion and 30-40 liters of water to spray the stems and leaves of most weeds at the 3-5 leaf stage.
Sethoxydim (74051-80-2) uses
The herbicide Sethoxydim is a highly selective systemic stem and leaf treatment agent that can be rapidly absorbed by the stems and leaves of grassy weeds and conducted to the tips and internodal meristems, causing cell division, destruction and death. It can be used on soybeans, cotton, rapeseed, peanuts, potatoes, sugar beets, sunflowers, flax and other crops and orchards to control barnyard grass, wild oats, setaria, wheatgrass, crabgrass, goosegrass, etc. It is ineffective against broadleaf weeds. For example, to control weeds in soybean and cotton fields, use 20% EC 10-20mL/100m2 and 8-15mL/100m2 to spray water respectively, or use 5% engine oil EC 10-15mL/100m2 to spray water.
Sethoxydim is currently often used in combination with other ingredients:
1) Prepare a mixed herbicide containing Sethoxydim and Sethoxydim. The herbicide contains fenpyridin and Sethoxydim as the main active ingredients. The mass ratio of fenpyridin and Sethoxydim is 0.1~ 80: 0.1~80. The mixed herbicide containing clopyralid and Sethoxydim of the present invention has significant effects in preventing various broad-leaf weeds and some gramineous weeds in non-arable land, orchards, woodlands, wheat and rape fields. It has the advantages of quick effect, thorough weeding, low residue, low toxicity, safety and environmental protection. It is a high-quality chemical herbicide for non-arable land, orchards, woodlands and rape fields.
2) Preparing a herbicidal composition containing Sethoxydim and bentazone as the main active ingredients, and the mass ratio of Sethoxydim and bentazone is 1 to 80: 1~80. The herbicidal composition of the present invention is applied to post-emergence weeding in soybean fields, and is especially effective in controlling various gramineous and broad-leaf weeds in soybean fields. Compared with a single agent, the herbicidal composition of the present invention delays weed resistance, has a wide herbicidal spectrum, has a long duration of effect, and is safe for soybeans and subsequent crops on the premise of improving the efficacy.
Sethoxydim (74051-80-2) Application
The herbicide Sethoxydim is suitable for weeding fields of broad-leaf vegetable crops such as sugar beets, rapeseed, and potatoes. It is particularly effective in controlling barnyard grass, crabgrass, wild oats, goosegrass, setaria, crocodile, stephania, and other annual grass weeds. It has certain effects on perennial grass weeds such as bermudagrass, reed and cogongrass. All treated weeds will die within 14 to 21 days. It has no control effect on broadleaf weeds and is safe for broadleaf crops. It has a short persistence period in the soil, and broadleaf crops can be sown on the same day of application.
(1) Treatment with 20% Sethoxydim EC. Dilute 20% Sethoxydim EC with water. When the grassy weed seedlings have 2 to 5 leaves, spray them evenly on the stems and leaves of the weeds. The dosage per acre depends on the type of vegetables. Varies. 25 days after the eggplant is sown, when the grass weeds have 10 leaves, use 20-25 ml of 20% Sethoxydim EC per acre, mixed with 50 kg of water and spray; after the emergence of kidney beans, peas, cowpeas, broad beans, etc. Use 100 to 120 ml of 20% Sethoxydim EC, mixed with 50 kg of water and spray; in fields such as large (small) cabbage, cauliflower, mustard, celery, green (white) radish, carrots, etc., use 20% Sethoxydim EC per acre. 100~125 ml, mixed with 37 kg of water and sprayed; in potato fields, to control annual grassy weeds, use 20% Sethoxydim EC 65~100ml per acre, and to control perennial grassy weeds, use 20% Sethoxydim EC 200 ~400 ml, mixed with 25~40 kg of water and sprayed; in the watermelon field, if the barnyard grass seedlings have 2~4 leaves, use 67~100 ml of 20% Sethoxydim EC per acre, and if the barnyardgrass seedlings have 6~7 leaves, Use 133 ml of 20% Sethoxydim EC per acre, mix it with 30-40 kg of water and spray it; when a large number of weeds occur in the seedling stage of leeks, you should first manually pull out the large weeds, and use 20% Sethoxydim per acre at the 3-4 leaf stage. Mix 65~100g of EC with 50kg of water and spray it on the stems and leaves of weeds. (2) 12.5% Sethoxydim engine oil emulsion is the best application period for gramineous weeds at the 3 to 5-leaf stage. Spray the weed stems and leaves evenly. The dosage per acre varies depending on the type of vegetables.
When the herbicide Sethoxydim is transplanted in the celery field and the grassy weeds are in the 3 to 5 leaf stage, use 75 to 100 ml of 12.5% Sethoxydim oil emulsion per acre, add 30 to 40 kilograms of water, and spray on the stems and leaves of the weeds. ; To control annual gramineous weeds in soybean fields, use 65 ml of 12.5% Sethoxydim oil emulsion per acre at the 2-3 leaf stage of most weeds, 100 ml at the 4-5 leaf stage, and 130 ml at the 6-7 leaf stage. , add 30 to 40 liters of water to the stems and leaves for spraying; to control annual grass weeds in rapeseed fields, at the 2 to 3 leaf stage of most weeds, use 100 ml of 12.5% Sethoxydim oil emulsion per acre, 4 to 5 leaves Use 110 ml at the 6- to 7-leaf stage, and 120 ml at the 6- to 7-leaf stage. Mix both with 30 to 40 liters of water for stem and leaf spraying; to control perennial grass weeds, use 12.5% acetate per acre at the 3- to 5-leaf stage of most weeds. Mix 200~330 ml of aridine engine oil emulsion with 30~40 liters of water for stem and leaf spraying.
Instructions for use of Sethoxydim (74051-80-2)
The herbicide Sethoxydim is used for post-emergence stem and leaf treatment. The dosage used to control annual weeds is 200~250g (a.i.)/hm2 [the dosage per mu is 13.3~16.7g (a.i.)], and the dosage used to control perennial weeds is 200-500g. (a.i.)/hm2 [Amount per mu is 13.3~33.4g (a.i.)].
1. For soybean fields, use 12.5% Sethoxydim engine oil emulsion or 20% Sethoxydim emulsifiable concentrate to control annual grass weeds at the 2 to 3 leaf stage. Use 67 ml per mu, 100 ml for the 4 to 5 leaf stage, and 133 ml for the 6 to 7 leaf stage. Under drought conditions, use 12.5% Sethoxydim as above. Use 100ml of 20% Sethoxydim EC per mu at the 2-3 leaf stage of annual grass weeds, 133ml at the 4-5 leaf stage, and 167ml at the 6-7 leaf stage. Adding 0.13 to 0.17L of diesel fuel to 20% propofadoxine per acre can improve the efficacy and reduce the dosage of propofadoxine by 20% to 30%. To control perennial grass weeds at the 3- to 5-leaf stage, use 200 to 330 m1 of 12.5% Sethoxydim oil emulsion or 20% Sethoxydim EC per acre. If pesticides are applied by airplane, the dosage can be appropriately reduced because it sprays more evenly than manual and ground machinery.
Mixed use: In soybean fields, the herbicide Sethoxydim can be mixed with herbicides such as acifluorfen, lactofenac, bentazone, and fomesafen for controlling broadleaf weeds. Mixing of diphenethyl engine oil emulsion and acifluorfen will slightly increase the phytotoxicity of soybeans. It is best to apply the pesticides in stages one day apart. In order to seize the agricultural season, it can also be mixed under good environment and climate conditions. Use 12.5% Sethoxydim per acre. Add 21.4% acifluorfen aqueous solution 67~100m1 to 83~100m1 of acetidine. The mixed use of diphoxyfop and lactofop-in will increase the harm, but the efficacy will increase and the dosage of lactofop-in can also be reduced. Use 83~100m1 of 12.5% Sethoxydim and 24% lactofop-in EC per acre. 26.7ml. The mixture of Sethoxydim and bentazone is safe for soybeans. Use 12.5%Sethoxydim 83~1001111 plus bentazone aqueous agent 167~200ml per acre. Two herbicides for controlling broadleaf weeds can be safely used on soybeans by reducing the dosage and mixing them with Sethoxydim. The efficacy is stable, especially under adverse conditions where soybeans do not grow well and still have good safety. The mixing formula per acre is as follows:
12.5 Dimethoxyfen 83～100ml plus 21.4% trifluorocarbamate aqueous solution 33～50ml plus 25% fomefenacet aqueous solution 33-50ml (or 10% flufenacet emulsifiable concentrate 20ml or 48% bentazone aqueous solution 100ml).
12.5% Sethoxydim 83 to 100 ml plus 24% lactoflufen EC 17 ml plus 25% fomesafen aqueous solution 33 to 50 ml (or 4896 bentazone aqueous solution 100 ml).
12.5% clomafen EC 50-70ml plus 48% clomazone EC 40-50ml plus 21.4% acifluorfen aqueous solution 33-50ml (or 24% clomafen EC 17ml or 48% fomesafen Aqueous solution 33~50ml or 48% bentazone aqueous solution 100ml).
1. For sugar beet fields, use 66.7-133.3 ml of 20% methoxymethine per acre, or 66.7-100ml of 12.5% methoxymethine per acre, and spray the stems and leaves with 20-40L of water. In sugar beet fields with mixed monocotyledonous and dicotyledonous leaves, it can be mixed with 300 to 400ml betaine or herbicide.
2. For cotton and flax fields, use 85 to 100 ml of 20% fenprophamide per acre, or 66.4 to 100 ml of 12.5% fenprophamide per acre, and spray it with water. In flax fields, it can be mixed with 50ml of 2-methyl-4-chloride to control monocotyledonous and dicotyledonous weeds in flax fields.
3. Use 100 to 120 ml of 20% methoxymethine per acre, or 60 to 100 ml of 12.5% methoxymethine per acre, and spray it with water. Sethoxydim can also be used to control gramineous weeds in watermelons, sesame seeds, broad-leaf vegetables and orchards.
Precautions for Sethoxydim (74051-80-2)
①Do not mix with alkaline pesticides.
② When spraying, prevent the droplets from drifting with the airflow to nearby rice, corn, wheat and other grass crops.
③Pesticides should be applied in the morning or afternoon on sunny days, and avoid spraying at noon when the temperature is high. It is not suitable to apply pesticides during long-term drought without rain, low turbidity and air humidity below 65%.
④When the weather is dry or the number of grassy weeds is large, use a high-limit dosage or increase the dosage appropriately. In areas where dicotyledonous and monocotyledonous weeds are mixed, after using this agent, measures should be taken to control dicotyledonous weeds. , to avoid excessive growth of such weeds.
⑤ Re-spraying is required if it rains within 2 hours after application.
⑥ Adding 0.1% non-ionic surfactant or 0.2% ordinary neutral laundry detergent to the spray solution of prophdoxy can significantly improve the weeding effect.
⑦ When there are many types of weeds in summer and autumn, spraying on the weeds with 20% Sethoxydiml EC and 50% atrazine wettable powder can improve the weeding effect.
⑧The herbicidal effect of Sethoxydim can only be seen after 7 days. Therefore, do not rush to take other weeding measures after applying pesticides.
Herbicide Sethoxydim (74051-80-2) price
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