Sulfonylurea herbicide Rimsulfuron
What is Rimsulfuron(122931-48-0)?
The herbicide Rimsulfuron is an organic compound with the chemical formula C14H17N5O7S2, Cas 122931-48-0. The pure product is a white crystalline solid. It is a sulfonylurea herbicide, a branched-chain amino acid synthesis inhibitor, and a selective post-emergence herbicide. Rat acute oral LD50>5g/kg, rabbit acute dermal LD50>2g/kg, slightly irritating to rabbit eyes, but not irritating to skin, not allergic to guinea pig skin, used to control annual growth in corn fields or perennial grasses and broadleaf weeds.
Physicochemical properties of Rimsulfuron(122931-48-0)
The herbicide Rimsulfuron pure product is a white crystalline solid. M.p.176～178℃, vapor pressure 1.5×0.001mPa (25℃), solubility in water at 25℃<10mg/L, distribution coefficient (n-octanol/water) 0.034, pKa4.1. Stable in neutral soil, easily degraded in acidic or alkaline soil. The half-life in soil is 1.7~4.3d. The hydrolysis half-life is 4.6d (pH=5), 7.2d (pH=7), and 0.3d (pH=9).
Rimsulfuron (122931-48-0) toxicity
The acute oral LD50 in rats is >5g/kg, and the acute transdermal LD50 in rabbits is >2g/kg. It is slightly irritating to the eyes of rabbits, but has no irritating effect on the skin, and is not allergic to the skin of guinea pigs. Acute inhalation LC50 (4 hours) in rats is >5.4mg/L. The no-effect dose in the feeding test is: 300mg/kg for male rats (2 years), 3g/kg for female rats (2 years); mice (18 months) )2.5g/kg, dog (1 year) is 50mg/kg. The no-effect dose in the second-generation reproduction test in rats is 3g/kg. Ames test, no mutagenic effect. No teratogenic or carcinogenic effects. The acute oral LD50 of quail is >2250mg/kg, and the acute oral LD50 of wild duck is >2g/kg. Quail and mallard LC50>5620mg/kg. Fish poison LC50 (96 hours): blue gill and rainbow trout>390mg/L, carp>900mg/L, sheepsheadminnow is 110mg/L. Bee LD50 (contact)>100ug/bee, (prescribed diet)>1g/kg. Earthworm LC50 (14 days)>1g/kg, Daphnia LC50 (48 hours)>360mg/L.
Rimsulfuron (122931-48-0) main properties
1. The drug has good quick-acting effect.
Generally, weeds will change color and wither within 5-7 days after spraying (weeds will completely die within 20-25 days after spraying).
2. Good lasting effect.
Rimsulfuron-furon is a systemic, stem and leaf herbicide. After spraying on the stems and leaves, it is still effective in controlling weeds for 30 days.
3. Better rain resistance.
After spraying, if it rains 6 hours later, it will have no obvious effect on the efficacy of the spray, so there is no need to spray again.
4. The security is relatively good.
Under normal conditions, Rimsulfuron will not cause adverse effects on corn and subsequent crops, but be careful not to use excessive amounts. If used excessively, corn is prone to phytotoxicity, and subsequent crops are also prone to problems (seedling emergence rate is reduced or residual phytotoxicity occurs).
Functions and prevention targets of Rimsulfuron (122931-48-0)
Characteristics of the herbicide Rimsulfuron is an inhibitor of acetolactate synthase (ALS), which inhibits the acetolactate synthase of plants and prevents the biosynthesis of branched-chain amino acids, thus inhibiting cell division. After the plant meristem is treated with rimsulfuron, sensitive grasses and broadleaf weeds stop growing, and then become chlorotic and withered until the whole plant dies.
The herbicide Rimsulfuronis used to control annual or perennial grass and broadleaf weeds in corn fields, such as field thistle, iron chestnut, cyperus rotundus, wrinkled leaf sorrel, Arabian sorghum, wild oat, hemostatic crabgrass, barnyard grass, Multiflora ryegrass, amaranth, amaranthus retroflexus, pigtail, poppy, chickweed. It is especially suitable for use early after the emergence of annual weeds. The recommended dosage is 5 to 15g of active ingredients/hm. Used for corn and potato weeding; safe for corn, safest for spring corn. The half-life of fenRimsulfuron in corn is only 6 hours. When treated with 2 to 4 times the recommended dose, corn is still very safe. In corn fields, the recommended dosage is 5 to 15 g (a.i.)/hm2 [0.33 to 1.09 (a.i.) per acre]. When used, it will have no adverse effects on subsequent crops, but it should not be used in sweet corn, popcorn, sticky corn and seed production fields.
Applicable crops: spring corn.
Preventive and control targets of Rimsulfuron(122931-48-0)
The herbicide Rimsulfuronkills most annual and perennial grass and broadleaf weeds. It can control barnyard grass, crabgrass, foxtail grass, golden foxtail grass, wild oats, wild sorghum, goosegrass, wild millet, pigweed, wind lily, commelder grass, shepherd's purse, purslane, sageweed, Wolfgrass, anti-cancer. Amaranth, wild watermelon seedlings, ragweed, endive, sorrel, amaranth, amaranth, weasel flowers, acanthus, anchovy, sedge, etc.
Rimsulfuron (122931-48-0) application technology
Apply the pesticide at the 2 to 4 leaf stage after spring corn emerges or at the 2 to 4 leaf stage of weeds (after almost all emergence). The dosage is recommended to be mixed with rimsulfuron plus surfactant and atrazine. Use 25% rimsulfuron 5g per mu (active ingredient 1.25g) plus 38% atrazine 120ml (active ingredient 45.6g) plus 60ml surfactant, spray 30 liters of water; or use 25% per mu 5 grams of rimRimsulfuron (active ingredient 1.25 grams) plus 75% Baoshuo 0.7 grams (active ingredient 0.5 grams) plus 60 ml of surfactant, spray on 30 liters of water.
When dispensing, you should first mix rimRimsulfuron with a small amount of water into a mother solution in a small cup, pour it into a sprayer filled with half of the water, stir, and then add an appropriate amount of atrazine into the sprayer, stir, It is best to increase the surfactant, add enough water, and stir evenly. The order of dispensing is scientific and cannot be reversed to avoid affecting the efficacy of the medicine.
The method of application should be to spray evenly on the soil surface along a single ridge. When spraying, determine the height and walking speed of the nozzle. Do not move left and right, and do not spray again or miss. It is recommended to use fan-shaped nozzles.
Rimsulfuron (122931-48-0) uses
The herbicide Rimsulfuron is a sulfonylurea herbicide, a branched-chain amino acid synthesis inhibitor, and a selective post-emergence herbicide. Used to control annual or perennial grasses and broadleaf weeds in corn fields, such as field thistle, iron chestnut, cyperus rotundus, wrinkled sorrel, Arabian sorghum, wild oat, hemostatic crabgrass, barnyardgrass, multifloral ryegrass, and weeds. Hemp, Amaranthus retroflexus, Pigweed, Poppy, Chickweed. It is especially suitable for use early after annual weeds emerge. The recommended dosage is 5-15g of active ingredients/hm2. Uses Corn and Potatoes; Safe for corn, safest for spring corn.
The herbicideRimsulfuronis a pre-emergent, post-emergent, systemic herbicide in corn fields. It can control most annual and perennial grass weeds and broadleaf weeds in corn fields, such as cyperus rotundus, Arabian sorghum, water chestnuts, day thistle, sedge, creeping wild wheat, wrinkled sorrel and other perennial weeds, wild oats, barnyardgrass Grasses, crabgrass, crabgrass, French foxtail, gray foxtail, foxtail, whorled foxtail, steppegrass, Leymus chinensis, multi-flowered ryegrass, bicolor sorghum, flat-leaf brachiaria, tribulus, woolly grass, autumn Annual grassy weeds such as millet, zephylla, amaranth, nodular amaranth, pigweed, chickweed, amaranth, amaranth retroflexus, chamomile, mint, poppy, dogtail, hyssop and other annual broad leaves Weed.
(1) Herbicidal characteristics: Rimsulfuron is a systemic conductive herbicide that can be absorbed by the stems, leaves and roots of weeds, and is then conducted in the plant body, causing sensitive plants by inhibiting the biosynthesis of side chain amino acids in the plant body. Growth stagnates, stems and leaves become chlorotic, and gradually die. Generally, new leaves become chlorotic within 4-5 days, and then spread to the entire plant, and the weeds are completely dead in 20-30 days. Rimsulfuron can be used to control broadleaf grasses, sedges and gramineous weeds in warm-season lawns (limited to bermudagrass and zoysia turfgrass). The recommended dosage is 12-16 grams/acre. For grassy weeds, use the higher recommended dosage. If broadleaf weeds are removed only, the dosage can be reduced to 6-8 grams/acre. The appropriate application period for mesosulfuron is when a large number of weed seeds germinate and the soil is moist. Spread evenly on fine soil to seal the soil. It can also be used when the weeds are in the 3 to 4 leaf stage and the plant height is less than 10 cm. Water 45 kg/ acres (Gongnong-16 sprayer 2 watering cans) for stem and leaf spraying. Jinbaixiu has special effects on Cyperus rotundus. The underground corms of Cyperus rotundus turn brown 5 to 7 days after treatment, and die and cannot regenerate in 10 to 15 days. This overcomes the shortcomings of other herbicides that require two consecutive applications to control Cyperus rotundus.
(2) Applicable lawn: It is suitable for warm season lawns (zoysia grass and bermudagrass) and is highly safe for turfgrass.
(3) Dosage per mu: 8-16 grams/mu
(4) The time when turfgrass can become resistant: early after emergence of turfgrass (10-15 days after emergence, the dosage at this time is the lower limit of dosage, which is 8 grams/acre) or after mowing.
(5) Types of weeds controlled: This product has a broad spectrum of herbicides and can effectively control most gramineous, sedge and broad-leaf weeds in the 3-4 leaf stage. , green amaranth, bluegrass, shepherd's purse, sageweed, chickweed, and nestweed have particularly outstanding control effects. It has excellent effects on perennial sedge weeds such as cyperus rotundus and water centipede.
(6) Usage technique: Apply after the weeds germinate, either by spraying soil or stems and leaves, but the weeding effect is better when applied early after the buds emerge, especially when the weeds have 3-4 leaves. The application effect is the best per acre of lawn The dosage is 8-16 grams, 40-50kg of water is used, and the weeds are sprayed on the stems and leaves.
(7) Do not use if cool-season lawns (bendgrass, bluegrass, tall fescue, etc.) are sensitive. The effect of controlling perennial sedges such as Cyperus rotundus, water centipedes, Cyperus rotundus, etc. in combination with Cyperus cyperus is excellent. Weeds with more than 5 leaves have reduced efficacy.
(8) The duration of effect in the soil is about 40-100 days, that is, the lawn soil can be sealed for 2-3 months and basically no weeds will grow.
(9) The weeding effect and safety vary from place to place, so it should be tested first and then promoted. When applying pesticides, the dosage should be accurate and the spray should be even.
Rimsulfuron (122931-48-0) compound
If Rimsulfuron is mixed with atrazine or thifensulfuron (thiansulfuron), it can not only expand the herbicidal spectrum, but also improve the control effect on broad-leaf weeds such as pigweed and polygonum. Use 5g of 25% sulfoRimsulfuron per acre, add 120ml of 38% atrazine, add 60ml of surfactant, mix with 30L of water and spray. Or use 25% thifenRimsulfuron 5g per acre, add 75% thifenRimsulfuron 0.7g, add 60ml of surfactant, and spray 30L of water.
Rimsulfuron·Atrazine
This formula is a compound of Rimsulfuron and atrazine and is the most classic formula among corn field herbicide formulas. At the 3 to 5 leaf stage of corn and the 2 to 4 leaf stage of weeds, 80 to 100 ml of 24% Nicosine·Atrazine dispersible oil suspension can be mixed with 20 to 30 kg of water and sprayed evenly, which has the dual effect of blocking. It can control common annual broadleaf weeds and grassy weeds in corn fields, and the weeds can be removed completely without rebound.
2-methyl-4-sodium chloride·Rimsulfuron
This formula is a herbicide compounded from 2-methyl-4-sodium chloride. It can be used at the 3-5 leaf stage after corn seedlings, the 2-4 leaf stage of annual weeds, and before the 6-leaf stage of perennial weeds. 50-60 ml of 2-methyl-4-sodium chloride·Rimsulfuron dispersible oil suspension, mixed with 20-30 kg of water and sprayed evenly, can be used to treat barnyard grass, crabgrass, setaria, purslane, amaranth, polygonum and other grass weeds It has good control effect on broadleaf weeds. It is especially effective against vicious weeds such as cyperus rotundus, purslane, bindweed, and bowlflower.
Rimsulfuron, Mesotrione·Atrazine
This formula is a herbicide composed of three ingredients: nicoRimsulfuron, mesotrione and atrazine. It can be widely used in ordinary corn, sweet corn, waxy corn, popping corn, and Denghai series corn. For various types of corn, at the 3- to 5-leaf stage of corn and the 2- to 4-leaf stage of weeds, use 100 to 120 ml of 30% nitrate, smoke, and atrazine dispersible oil suspension, mixed with 20 to 30 kg of water, and spray evenly. It can effectively control annual broadleaf weeds and gramineous weeds in corn fields. It is safe for corn and provides clean and thorough weeding.
Rimsulfuron mixed with pesticides
NicoRimsulfuron is mixed with certain insecticides (such as pyrethrin insecticides) to achieve the purpose of weeding and insect control. It can control various pests on corn leaves, such as armyworms, aphids, thrips, and corn borers. wait.
Be careful not to use it together with organophosphorus pesticides, as this may cause phytotoxicity.
How to Rimsulfuron(122931-48-0)
1. Used for rice: It is generally used in the 1-3 leaf stage of rice. Use 25% WP15-20g per acre mixed with poisonous soil and spread it. It can also be mixed with water and sprayed.
Keep the water layer for 3-5 days after medication. In the transplanted field, apply the medicine 3 to 20 days after transplanting, and retain water for 5 to 7 days after treatment.
2. Used for wheat: Used at the 3-5 leaf stage of spring wheat. Spray the stems and leaves with 75% closulfuron WDG at a dosage of 75-90 g/ha.
3. For corn: Apply once at the 3-5 leaf stage after corn seedlings, the 3-5 leaf stage of weeds, and the 4-5 leaf stage during the period.
The dosage of the preparation is 75% WDG45-60g/ha, mixed with 15-30 liters of water. As a corn field herbicide, it needs to be used together with MON13900.
4. Used for sorghum: It is generally used from the 2-leaf stage after sorghum seedling to before heading, and the 2-4 leaf stage of weeds. The specific dosage is 50% WP72-140g (active ingredient 36-70g)/ha.
5. Used in sweet potatoes: Because closulfuron methyl is highly toxic to sweet potatoes, it is generally used at the 2-4 leaf stage of weeds for spray treatment. The specific dosage and active ingredient content is 45-60 g/ha.
Problems with the use of Rimsulfuron(122931-48-0)
1.Spraying period
The best time to use Rimsulfuron:
·In the 3 to 5 leaf stage of corn (the most resistant and less prone to phytotoxicity);
·2-4 leaf stage of annual weeds (weeds are smaller and easier to control);
·Pesticide application on perennial weeds is best before the 6-leaf stage when most weeds have emerged.
(1) Ordinary Rimsulfuron without added safety agent:
Try not to use it when corn is below the 2-leaf stage or above the 6-leaf stage. It is sensitive and prone to phytotoxicity. If it must be used when it is above 6-leaf stage, it must be sprayed in a directional manner to avoid phytotoxicity after spraying on the heart leaves.
(2) NicoRimsulfuron with added safety agent:
Compared with ordinary Rimsulfuron, it is relatively safe and can be used after the 5-leaf stage. However, the weeding effect is poor the later it is used, so it is recommended to use it at the 3-5 leaf stage.
2. Key points for use
(1) When using, dilute twice
When spraying, the pesticide must be diluted twice. It is strictly forbidden to pour the herbicide directly into the bucket to prevent phytotoxicity due to high concentration.
(2) Use drugs rationally according to the actual situation.
This year, the weather is relatively dry. When spraying, you need to increase the amount of water and spray evenly and thoroughly to kill the grass. (Because during drought, weeds will close their pores in order to maintain their own moisture. Even if pesticides are applied at this time, the weeds' ability to absorb the liquid is relatively weak, and the weeding effect is not good.)
However, be careful not to re-spray or spray unevenly, as this may cause phytotoxicity problems.
3.Taboos in use
(1) Do not spray pesticides when there is dew or high temperature.
The best time for spraying is on a sunny day with no wind, after 5 pm or 6 pm. If there is dew in the corn heart leaves in the morning or the temperature exceeds 35 degrees, it is not recommended to spray pesticides.
(2) Rimsulfuron is prohibited in sensitive corn varieties.
Such as sweet corn, waxy corn, popping corn and other corn varieties.
(3) Cannot be mixed with organophosphorus pesticides.
If the corn seed coating contains organophosphorus pesticides, or after the corn field is sprayed with organophosphorus pesticides, try not to use Rimsulfuron herbicide as it is prone to phytotoxicity (if you must use it, leave it at least 7 days apart).
4. Problems with drug residues and drug hazards
1. Rimsulfuron drug residue problem
Under normal dosage conditions, Rimsulfuron has no residual phytotoxicity on subsequent crops of wheat, garlic, sunflower, alfalfa, potatoes, soybeans, etc.;
However, it is harmful to crops such as cabbage, sugar beet, spinach, and rape. These sensitive crops cannot be planted in the second year of application.
2. The problem of drug harm
Under normal circumstances, after using Rimsulfuron, if only slight harm occurs, there is no need to spray medicine to relieve it, and it will recover on its own in a few days; but when it is serious, it needs to be sprayed in time to relieve it.
How to Rimsulfuron(122931-48-0) to control weeds in corn, potato and tobacco fields
When Rimsulfuron is applied, the weeds first stop growing after receiving the drug, then turn green and develop dead spots, until the entire plant dies. Suitable for controlling broadleaf weeds and grassy weeds in corn fields, such as commelina, shepherd's purse, purslane, salsa, amaranthus retroflexata, amaranth, cheesy intestine, weasel petals, acanthus, and wolfberry. Grasses, ragweed, chickweed, pitcherwort, sorrel, pigweed, kochia, barnyardgrass, crabgrass, setaria, wild oats, wild sorghum, stephanotis, multiflower ryegrass, wild millet and sedge. The product is 25% dry suspension agent, 25% water-dispersible granule, and 11% dispersible oil suspension agent.
(1) To control annual weeds in spring corn fields, use 5 to 6 grams of 25% water-dispersible granules per mu or 4 to 5 grams + 48 to 60 grams of atrazine as active ingredient. In Northeast China, 0.2% nonionic surfactant should be added ;
(2) To control annual and some perennial weeds in summer corn fields, use 5 to 6 grams or 3 to 4 grams of 25% water-dispersible granules per mu + 40 to 48 grams of atrazine as the active ingredient;
(3) To control annual weeds in potato fields, use 5.5 to 6 grams of 25% water-dispersible granules per mu.
(4) To control annual weeds in tobacco fields, use 5 to 6 grams of 25% water-dispersible granules per mu.
The best results are achieved when the weeds are applied at the 2- to 4-leaf stage. For water volume of 30 kilograms per mu or more, add 60 grams of washing powder to the liquid at 0.2% of the spray volume.
It should be noted that pesticides applied after the 6-leaf stage of corn are prone to phytotoxicity. Sweet corn, popcorn corn, and sticky corn fields are not suitable for use. Since there are many varieties of corn grown in production, their safety should be identified on a small area before promotion. The safety interval between crops and subsequent crops is 90 days.
Note: It is strictly prohibited to use a mist sprayer to apply pesticides. Use the sprayer in a 15kg medicine bucket, and mix each bag with a bucket of water for easy use. When dispensing, first dissolve the herbicide sulfoRimsulfuron in a small cup with water, then pour it into a spray tank that is half full of water, add enough water, stir thoroughly, then add the washing powder and stir evenly That’s it. When spraying, the height of the nozzle should be controlled so that the liquid just covers the rows of crops and is sprayed evenly along the rows. It is strictly prohibited to spray the liquid directly onto tobacco leaves and into the bell mouth of corn. It is prohibited to use organophosphorus pesticides within seven days before and after using the herbicide Rimsulfuron to avoid phytotoxicity. Applied no more than once per crop season, it is safe for subsequent crops at the above recommended dosage. It should not be used in sweet corn, popped corn, sticky corn and seed corn fields. Remember, because this product is sensitive to certain corn varieties, it must be applied in corn fields under the guidance of technical personnel. Wear long clothes, long trousers, gloves, glasses, etc. when applying pesticides; do not eat, drink, smoke, etc. at this time; wash hands and face after applying pesticides. Empty bags after use can be burned or buried deeply as allowed by local regulations and cannot be used for other purposes. Avoid contact with pregnant and lactating women. Wastewater from cleaning equipment cannot be discharged into rivers, ponds and other water sources.
Precautions for Rimsulfuron(122931-48-0)
1. The prepared medicinal solution should be sprayed out as soon as possible and should not be left for a long time.
2. Because this drug is extremely active, please clean the medical equipment promptly after use. Pour out the remaining liquid in the sprayer and rinse the sprayer with clean water for 5 minutes. Then pour out the water and rinse with clean water 2 to 3 times; fill the sprayer with water, add 10 grams of alkaline soda or 20 grams of washing powder per 30 liters of water, stir, spray back into the sprayer from the nozzle, and cycle for 10 to 15 minutes. Remove the nozzles and clean them individually.
3. Be careful not to pour wastewater into other crop fields or pollute water sources.
4. Please read the product label and product instructions carefully before use.
5. Within 7 days before and after using this agent, try to avoid using organophosphorus pesticides, otherwise it may cause corn phytotoxicity.
6. This agent should be applied before the 4-leaf stage. If the corn exceeds the 4-leaf stage, phytotoxicity will occur if used alone or mixed with corn. Symptoms of phytotoxicity include difficulty in jointing, short plant height, light-colored leaves, yellowing, and heart failure. The leaves curl up, become hard, and become red, and will recover in 10 to 15 days.
7. It is not suitable for use in sweet corn, popcorn, sticky corn and seed production fields.
8. Please abide by the safety rules for pesticide use, wear work clothes when applying pesticides, and wash your hands and face after applying pesticides.
The price of herbicide Rimsulfuron(122931-48-0)
Under normal circumstances, the price of the pesticide and herbicideRimsulfuronwill be affected by raw materials, market environment, research and development costs, etc. If you want to know the latest price of the pesticide and herbicide Rimsulfuron-furon you need, please contact us to initiate an inquiry.
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Supplier of herbicide Rimsulfuron(122931-48-0)
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