Triazine selective post emergence herbicide Atrazine
What is atrazine cas102029-43-6?
Pesticide herbicide Atrazine Cas 102029-43-6 Soil and stem and leaf treatment chlorotriazine herbicide is an organic compound with the chemical formula C8H14ClN5 and a triazine herbicide. It is a selective pre-emergence and post-emergence herbicide. It controls annual broadleaf weeds and grassy weeds. It controls broadleaf weeds better than grassy weeds, and it also has a certain inhibitory effect on perennial weeds. Before weed germination or at the 1 to 3 leaf stage after germination, use 200 to 250 ml of 38% atrazine suspension per acre. Due to its long duration of effect, it is generally mixed with other herbicides in production to reduce the dosage and reduce the occurrence of phytotoxicity.
When the herbicide atrazine enters the plant, it is mainly absorbed by the roots, and slightly less by the stems and leaves. It is transmitted to the meristem and leaves through the xylem, interfering with photosynthesis and causing the death of weeds. In resistant plants such as corn, it is enzymatically decomposed by benzoxazinone into non-toxic hydroxytriazine and is selected. Its mechanism of action and selection principle are the same as those of simazine. Because its water solubility is greater than that of simazine, its activity is also higher, and its mobility in the soil is also greater. It is easily leached to deep layers by rainwater, affecting groundwater quality.
Because atrazine can reduce the activity of glutathione transferase in animals, thereby affecting the immune system; it can also damage stomach, kidney, liver tissue, genetic material DNA and other adverse signs, and can be decomposed by microorganisms in the soil, with residual effects Depending on factors such as dosage, soil texture, rainfall, temperature, etc., if applied improperly, the residual effectiveness may exceed half a year. It is suitable for corn, sorghum, sugar cane, millet, grapes, apple orchards, nurseries, woodlands, rubber plantations, etc., but peach trees are sensitive to it.
Atrazine cas102029-43-6 Physical and Chemical Properties
The herbicide atrazine is a colorless crystalline solid with a melting point of 173-175°C and a vapor pressure of 4×10-5Pa at 20°C. It is slightly soluble in water and easily soluble in organic solvents such as methanol and chloroform. It is stable under neutral, slightly acidic and alkaline conditions. At higher temperatures, strong acid and strong alkali can hydrolyze it. In the soil, it is easy to be washed by rainwater to the deeper soil layer. It is absorbed through the root system of the plant and transmitted to the leaves, inhibiting the Hill reaction, causing the plant to become chlorotic and starve to death. It can also be absorbed by the leaves to cause direct poisoning. Corn, sorghum, etc. can hydroxylate the agent and lose its activity, so it has strong resistance. Mainly used in corn, sorghum fields, orchards, tea gardens, sugarcane fields, nurseries and forest fire roads to control annual monocotyledonous and dicotyledonous weeds. It is of low toxicity to humans and animals. The acute oral LD50 in rats is 3080mg/kg, and the acute transdermal LD50 in rabbits is 7500mg/kg. It has a long residue period in the soil and is prone to phytotoxicity on subsequent sensitive crops.
Atrazine cas102029-43-6 dosage form and quality standards
40% atrazine suspension is composed of active ingredients, additives and water. It appears as a white viscous flowable suspension liquid with a suspension rate greater than or equal to 90%. It has qualified dispersion and a storage period of at least two years at room temperature. 50% or 60% atrazine wettable powder consists of active ingredients, fillers and surfactants. The appearance is off-white powder, the suspension rate is greater than or equal to 34%, the moisture content is less than or equal to 3%, and the pH value is 6-9. The storage period at room temperature is at least two years. 38% suspending agent, flowable suspension Chemicalbook liquid, active ingredient content 38.0%+2, -1, suspension rate greater than or equal to 90%, pH value 6.0-9.0, fineness 3-5μm, thermal storage stability qualified. 48% wettable powder, powder without visible impurities and clumps, active ingredient content 48.0%+2.0, -1.0, water content less than or equal to 3.0%, suspension rate greater than or equal to 60%, wetting time less than or equal to 120 seconds , fineness 95% (passed through 325 mesh sieve), pH value 6-9, thermal storage stability qualified.
Atrazine cas102029-43-6 function
The herbicide atrazine is a selective systemic pre-emergence and post-emergence herbicide. When atrazine enters the plant, it is mainly absorbed by the roots, and slightly less by the stems and leaves. It is transmitted to the meristem and leaves through the xylem, interfering with photosynthesis and causing the death of weeds. In resistant plants such as corn, it is enzymatically decomposed by benzoxazinone into non-toxic hydroxytriazine and is selected. Its mechanism of action and selection principle are the same as those of simazine. Because its water solubility is greater than that of simazine, its activity is also higher, and its mobility in the soil is also greater. It is easily leached to deep layers by rainwater, affecting groundwater quality. Because atrazine can reduce the activity of glutathione transferase in animals, thereby affecting the immune system; it can also damage stomach, kidney, liver tissue, genetic material DNA and other adverse signs, and can be decomposed by microorganisms in the soil, with residual effects Depending on factors such as dosage, soil texture, rainfall, temperature, etc., if applied improperly, the residual effectiveness may exceed half a year.
Atrazine cas102029-43-6 Features
1. Synthesis is convenient and easy to produce, and the entry barrier is low. Atrazine is the easiest to produce in the s-triazepine family. When the substituent in the parent nucleus of the triazepine heterocyclic ring is a chlorine atom, it is the "azine" type. There are also "net" type, "tong" type and "tong" type. ” class, the synthesis is more complicated than this class.
2. Widely used and solid market foundation. Atrazine can be widely used in a variety of crops and environmental conditions such as corn, sorghum, sugarcane, forest trees, and non-cultivated land. Corn is one of the three largest crops in the world. In 2014, the planting area exceeded 500 million acres. Some fields Weeding is carried out twice before and after emergence. Both contain atrazine and the dosage is larger.
3. The application period is wide, easy to operate and easy to apply. Atrazine can be processed into a variety of dosage forms. Users can perform soil sealing and post-emergence stem and leaf weed killing for a long period of time during a corn season. It is very popular among farmers.
4. It has a broad spectrum of killing weeds and good weeding effect. Atrazine can control both grass and broadleaf weeds. It can control crabgrass, barnyard grass, foxtail grass, amaranth retroflexus, purslane, amaranth, pigweeds and leguminous weeds. It is also effective against some deep-rooted crop weeds. It has a certain effect and can still be effective for a certain period of time under drought conditions, which is better than other agents.
5. It is highly safe for the crops it is applied to, allowing farmers to use it with confidence and not abandon it. It has been proven that the crops containing zeindone or atrazine can be quickly decomposed through dealkylation and conjugation reactions, so it only kills weeds and does not harm seedlings. Since its widespread application in corn, sorghum, sugarcane and other crop fields, no phytotoxicity has been reported.
6. It has good compatibility and can be compounded with a variety of pesticides, all of which have additive or synergistic effects. Used for soil sealing, it can be compounded with amide and dinitroaniline acetochlor, butachlor, metolachlor, metolachlor, pendimethalin and other chemicals. Used for stem and leaf treatment, it can be compounded with nicosulfuron, mesotrione, and oxatrione, and can also be combined with nicosulfuron, bromoxynil, dimethyl tetrachloride, 2,4-D butyl ester, A variety of pharmaceuticals such as thifensulfuron, thifensulfuron, and ethifuron are used for binary or ternary compounding. Atrazine is highly miscible and deserves to be ranked first among herbicide mixtures. This is also an important favorable condition supporting atrazine as a large-tonnage variety.
7. Cheap price and high cost performance. Calculated based on the cost per mu, the price of atrazine is relatively low or the lowest, which is another important reason why farmers can't put it down.
Atrazine cas102029-43-6 characteristics
1. Strong mixability
The cost of using the herbicide atrazine is relatively low. The cost per acre of corn is about 3-6 yuan, and the control effect is good. It is one of the best choices for farmers to control weeds in corn fields. However, with its widespread use, its resistance has also appeared. At this time, it needs to be used together with other herbicides to achieve better weeding effects.
For example, atrazine is compounded with acetochlor, metolachlor, etc. after corn sowing and before emergence, and the sealing effect is good. Combining nicosulfuron, mesotrione, etc. after corn seedlings can achieve the effect of 1+1>2.
2. Broad spectrum herbicide
The herbicide atrazine can control broadleaf weeds and a variety of annual grass weeds, and also has a certain inhibitory effect on some perennial weeds. For example, crabgrass, barnyard grass, foxtail grass, sedge, wheatgrass, polygonum, pigweed, cruciferous, leguminous weeds, etc.
It is suitable for crops such as corn, sorghum, sugarcane, etc. It is especially selective for corn (because corn has a detoxification mechanism). It can effectively eliminate weeds while avoiding phytotoxicity to corn.
3. Can be used before and after emergence
The herbicide atrazine is a pre-emergence and post-emergence herbicide. It is used before emergence after corn is sown, that is, when the weeds are in the 2-3 leaf stage. The weeding effect is very good. Everyone must grasp the timing when using it.
4. Long residual period
The herbicide atrazine has a strong killing effect on weeds, but its residual period is relatively long, which can reach about 80 days, and it can cause phytotoxicity to subsequent crops such as wheat and soybeans. After a plot that has been planted with corn for a long time is replanted with vegetables and other crops, it is easy for the seedlings to die.
When using the herbicide atrazine, you must strictly follow the instructions or the guidance and recommendations of local retailers to avoid using too much, which may cause phytotoxicity in subsequent crops.
5. Soil moisture affects weeding effect
The mechanism of action of the herbicide atrazine is to inhibit the photosynthesis of weeds by being absorbed by the roots of weeds and conducted upward, eventually causing the death of weeds. When the soil moisture is poor, the weed root system will not absorb well. If atrazine is applied at this time, the weed root system will absorb less and the weeding effect will not be ideal.
Atrazine cas102029-43-6 uses
The pesticide herbicide atrazine is a systemic selective pre-emergence and post-emergence closed herbicide. It is mainly absorbed by roots, and very little is absorbed by stems and leaves. Its herbicidal effect and selectivity are the same as simazine, and it is easily leached into the soil by rainwater. Deeper, it is also effective on some deep-rooted grasses, but is prone to phytotoxicity. The shelf life is also longer. It has a broad herbicidal spectrum and can control a variety of annual grasses and broadleaf weeds. It is suitable for controlling crabgrass, barnyard grass, foxtail grass, sedge, wheatgrass, polygonum, pigweed, cruciferous and leguminous weeds in upland crops such as corn, sorghum, sugarcane, fruit trees, nurseries, and woodlands, especially for corn. Good selectivity (due to the detoxification mechanism in corn), it also has a certain inhibitory effect on certain perennial weeds.
Atrazine cas102029-43-6 weeding principle
The herbicide atrazine is mainly absorbed through plant roots and conducted upward, inhibiting the photosynthesis of weeds and causing them to die. There are two sets of photosynthetic systems in the chloroplast membrane, which are called photosynthetic system I (PSI) and photosynthetic system II (PSII). In PSII, there are central pigment P680, pheophytin and plastoquinone. When light energy is transmitted to P680, electrons move from P680 through PSII pigment molecules to plastoquinone. This process is repeated until plastoquinone accepts two electrons in the reduction reaction and is reduced to plastohydroquinone (diphenol). Plastoquinone acts as an "electron transporter" between PSII and PSI. When two electrons catch up with this transporter, the newly formed plastohydroquinone separates from PSⅡ and goes to PSⅠ. When plastoquinone moves away from PSⅡ, a new plastoquinone is combined at the same position, and the process is repeated. Process. However, if a molecule with a similar shape is present, such as atrazine, it is possible that it binds in place of the plastoquinone. When atrazine binds, the plastoquinone molecule is prevented from rebinding and passing on more electrons. . These electrons will react with the oil in the cell membrane, destroy the cell membrane, and eventually lead to cell death.
How to use atrazine cas102029-43-6
1. Use of herbicide atrazine in corn fields: Summer corn is used after sowing and before emergence. In places such as North China and Shandong where the soil organic matter quality is 1%-2%, 150-200 grams of 50% wettable powder per acre is used. , or 175-200 ml of 40% suspending agent; in the northeastern region where the soil organic matter content is greater than 3%-6%, use 200-250 grams of 50% wettable powder per acre, or 200-250 grams of 40% suspending agent, sand Use the lower limit for clay soils and the upper limit for clayey soils. 1-3 days after sowing, spray 30 kg of water evenly on the soil surface. When corn emerges, the appropriate period is the 4-leaf stage of corn and the 2-3 leaf stage of weeds; for sandy soil with low organic matter content, use 200-250 grams of 50% wettable powder or 40% suspending agent per acre. Spray 30-50kg of water. For spring corn, use 200-250 ml of 40% suspension agent per acre, add 30-50 kg of water, spray the soil surface before seedlings after sowing, mix with soil after spring drought treatment, or irrigate appropriately. Or do stem and leaf treatment at the 4-leaf stage of corn. In the continuous cropping area of corn and winter wheat, in order to reduce or eliminate the phytotoxicity of atrazine on wheat, atrazine reduction can be combined with Caojingzine, Laso, Doer, 2,4-D butyl ester, Bandi Nong, and Lvmalon. Herbicide mix.
2. Use of the herbicide atrazine in sugarcane fields: 5-7 days after the sugarcane is planted, weeds will be unearthed. Use 200-250 grams of 50% wettable powder or 40% suspending agent per acre, add 30 kg of water, and apply to the surface. Spray evenly.
3. Use of the herbicide atrazine in tea gardens, orchards, and vineyards: During the peak germination period of field weeds from April to May, first eradicate the unearthed large grasses and overwintering weeds, and then use 250-300 grams of 40% suspending agent per acre. Spray 40kg of water evenly on the soil surface.
4. Atrazine is a herbicide for pre-emergence soil treatment and can also be used for post-emergence stem and leaf treatment. During use, drought has a greater impact on the efficacy of the medicine. It mainly affects dicotyledonous plants and focuses on sealing. The effect on large grasses is not ideal.
(1) The herbicide atrazine controls weeds in corn fields. The best effect is to use 400 to 450 grams (8 to 9 taels) of atrazine per acre according to the active ingredient. For weeding in the seedling stage of corn, according to the active ingredient, the amount per acre is the best. 250 grams (5 taels) per mu has good control effect, and the seedling preservation rate is 11.5% higher than that of manual weeding. The plant height is 8.6 to 11.5 cm (3 to 4 inches) higher than that of manual weeding.
(2) The herbicide atrazine controls weeds in sorghum fields. Calculated in terms of active ingredients, 300 to 350 grams (6 to 7 taels) per mu has the best effect.
(3) The herbicide atrazine controls weeds in soybeans, millet and other crops. Use 150 grams (3 taels) of atrazine 50% wettable powder + 250 grams (5 taels) of dragline per acre; or use atrazine Mixing 250 grams (5 taels) of 50% wettable powder + 200 grams (4 taels) of Durr will have a better effect. It can not only kill weeds, but also solve the safety problem of the next crop.
Atrazine cas102029-43-6 herbicidal effect
The pesticide atrazine is a long-acting pre-emergent herbicide with a half-life in the soil of 35 to 50 days. Clay soil particles have strong adsorption capacity for the pesticide and will remain for a longer period of time. This often occurs in some subsequent crops. Due to phytotoxicity, it is usually mixed and used in other areas. Different types of corn varieties have different resistance to atrazine. This drug cannot be used in corn inbred lines, sweet corn, waxy corn, popping corn fields and corn seed fields. Do not apply this drug to sweet corn fields to avoid phytotoxicity.
After atrazine is used in corn planting for several years, when soybeans are planted, the growth of soybeans will be seriously inhibited, or dead seedlings will appear, resulting in a substantial reduction in yield. Atrazine + acetochlor (metolachlor, metolachlor) + 2,4-D isooctyl is used in corn fields. The annual usage of the active ingredient of atrazine is less than 1,710 g/ha. Caution may be used in subsequent crops. Plant spring soybeans; the annual dosage of the active ingredient atrazine is 1,710 to 2,400 grams/hectare. When spring soybeans encounter rainfall and there is sufficient sunshine after the rain, the damage will be serious and the yield will be significantly reduced. Planting spring soybeans is not recommended. Silage corn, corn, etc. can be planted. Fresh corn, sorghum, millet, etc.; the annual usage of the active ingredient atrazine is more than 2,400 grams, and only silage corn, fresh corn or popcorn, etc. can be planted in subsequent crops.
In the corn and wheat rotation in the Huanghuai region, when the active ingredient of atrazine in corn exceeds 80 grams per acre, it will easily lead to low wheat emergence rate or inhibit the growth of seedlings. In corn and rice rotation, when the active ingredient of atrazine exceeds 70 grams per acre of corn, it will easily cause phytotoxicity to the next crop of rice.
Sweet corn is a crop that has been widely planted in South China in recent years. Due to the special climatic conditions in Guangdong, two to three crops can be planted a year. Therefore, the herbicide atrazine, which is safe for sweet corn, is frequently used, resulting in soil contamination. Atrazine is used to grow sweet corn and sticky corn in the south. When cruciferous vegetables and legumes are planted continuously after the green ears are harvested, it often causes phytotoxicity in the vegetable seedlings, such as leaf chlorosis, leaf edge curling, and dwarfed plants. Atrazine should not be used in corn fields intercropped with beans.
When using atrazine, if the liquid drifts due to wind or improper usage, it will cause leaf yellowing or leaf edge curling to adjacent watermelons, cucumbers, beans, peach trees, poplars, jujube trees, etc. Phenomenon, in severe cases the leaves will fall off. Crops such as wheat, rice, spinach, cucumber, watermelon, tomato, cabbage, cauliflower, cabbage and rapeseed are very sensitive to atrazine. In the soil, when the residual atrazine per kilogram of soil exceeds 0.080 mg, the growth of Chinese cabbage will be significantly inhibited; when the residual atrazine exceeds 0.104 mg, the growth of cabbage is abnormal; when the residual atrazine exceeds 0.081 mg, the growth of direct-seeded japonica rice is abnormal. In other words, when there is even a small amount of atrazine remaining in the soil, the growth of the above-mentioned atrazine-sensitive crops will have problems.
Atrazine cas102029-43-6 Application
1. Used to prepare a corn field herbicidal composition containing atrazine and sulfentrazole
It is a corn field herbicidal composition containing atrazine and sulfentrazole that has significant synergy, broad herbicidal spectrum, and can delay drug resistance. Provided is a cornfield herbicidal composition containing atrazine and atrazine. The active ingredients in the cornfield weeding composition are atrazine and atrazine. The two atrazine and atrazine are provided. The weight ratio between them is 2:1~20.
The herbicide atrazine is a triazobenzene control agent that affects the growth of plants by acting on plant photosynthesis. It has a good control effect on broad-leaf weeds in corn fields such as amaranth and some grass weeds; Oxalazole is an isoxazole herbicide that kills plants by inhibiting ultra-long chain fatty acid elongation synthase. It has good control effects on most grass weeds and broadleaf weeds in corn fields. There are great differences in the mechanism of action and herbicidal spectrum of the two, and their mixed use is highly complementary. The advantages of its mixed use are as follows:
1. Significant efficiency increase
The mixed use of atrazine and fenpyrazole has a synergistic effect and improves the control effect on weeds.
2. Expand the herbicide spectrum
Atrazine has a good effect on various grass weeds such as crabgrass and barnyard grass in corn fields, and also has a good control effect on broad-leaf weeds such as amaranth and wild amaranth, but has a poor effect on setariae, amaranth, etc. ; Dipyrazofen can effectively control monocotyledonous and dicotyledonous weeds in corn fields such as Setaria and amaranth. The herbicidal spectrum of the two is not exactly the same. Mixed use can control most malignant weeds in corn fields and expand the herbicidal spectrum.
3. Delay drug resistance
Dipyrazole is an isoxazole herbicide that kills plants by inhibiting the plant's very long chain fatty acid elongation enzyme; atrazine is a sulfonylurea herbicide that is an inhibitor of acetolactate synthase and causes plant branching. The synthesis of chain amino acids is affected, which in turn affects the protein synthesis of the plant, causing damage to the normal growth of the plant and eventually leading to death; the herbicidal action mechanisms of fenpyrazole and atrazine are different, and they have no cross-resistance and can be used together. It can delay the development of weed resistance to pesticides.
2. Used to prepare atrazine herbicide composition containing pesticide synergist
An atrazine herbicide composition containing a pesticide synergist is provided to overcome the above-mentioned defects in the existing technology and meet people's needs.
How to avoid the residual consequences of atrazine cas102029-43-6 ?
1 Deeply plow the soil, first use a deep plow to plow it, and strive to remove the atrazine residues in the topsoil layer below.
2. Add biological bacterial fertilizer and decomposed farmyard manure to accelerate the decomposition of residual atrazine. After application, rotary till the soil 2 to 3 times.
3. First replant sorghum or transplant fruit trees, but when planting fruit trees, you need to treat the root system with rooting powder to accelerate the growth of new roots.
4. Combined with soil disinfection to prevent soil-borne root diseases, some experiments have found that dicortisone can be used to treat the soil, which can also reduce the residual phytotoxicity of atrazine.
5 The use of ammonium nitrogen fertilizer can also reduce the damage of atrazine to crops.
Atrazine cas102029-43-6 Precautions
Soybeans, peach trees, wheat, rice, etc. are sensitive to atrazine and should not be used. When the corn fields are followed by wheat or rice, the dosage should be reduced and mixed with other safe herbicides. Soil with an organic matter content of more than 6% is not suitable for soil treatment. It is better to treat stems and leaves.
(1) Atrazine has a long residual effect period and is harmful to some sensitive crops such as wheat, soybeans, rice, etc. Atrazine can be mixed with other herbicides at a reduced dose; or application techniques can be improved to avoid harmful effects on subsequent crops. Effects of stubble crops. Most of the corn crops in North China are winter wheat, so atrazine alone cannot exceed 3kg/hm2 (active ingredient 1.5kg). It is required to spray evenly, otherwise excessive dosage or uneven spraying will often cause damage to the wheat and even death of the seedlings. For continuous planting of corn fields, the dosage can be increased appropriately. Green fodder corn is only used after sowing and before emergence in Shanghai. At the 3 to 4 leaf stage of the seedling stage, stem and leaf treatment will have an impact on subsequent rice crops.
(2) The use of atrazine in orchards is not safe for peach trees. Because peach trees are sensitive to atrazine, which manifests as yellow leaves, chlorosis, fruit drop, and severe yield reduction, it is generally not suitable to be used.
(3) Atrazine should not be used when interplanting corn with beans.
(4) After sowing atrazine and before emergence, when treating the soil surface, it is required that the land should be leveled and the soil clods should be broken up before application.
(5) Atrazine is a low-toxic herbicide, but dispensing and application personnel still need to pay attention to prevent contamination of hands, face and skin. If there is contamination, they should wash it immediately. Atrazine can cause poisoning through the esophagus and respiratory tract, and there is no specific antidote for poisoning.
(6) After applying pesticides, all tools must be carefully cleaned, sewage and remaining pesticide liquid must be properly handled or stored, and must not be dumped arbitrarily to avoid contaminating water sources, soil and causing pesticide harm. Empty bottles must be recycled promptly and disposed of properly and must not be used for any other purpose.
(7) When handling, care should be taken to handle it with care to avoid damage and environmental pollution. Special wagons and warehouses should be used for transportation and storage, and they must not be transported together with food and daily necessities. Should be stored in a dry and well-ventilated warehouse.
Herbicide atrazine cas102029-43-6 price
Under normal circumstances, the price of the pesticide and herbicide atrazine will 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 atrazine you need, please contact us to initiate an inquiry.
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Herbicide Atrazine cas102029-43-6 Supplier
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