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Carbendazim is also known as Cotton Weiling or Benzimidazole No. 44. Carbenzazim is a broad-spectrum fungicide that is effective in controlling diseases caused by fungi in various crops (such as Haplenomycetes and Polycystis). It can be used for foliar spraying, seed treatment, and soil treatment. It can effectively prevent and control various crop diseases caused by fungi and is widely used in China, but its residues can cause liver diseases and chromosomal abnormalities, which are toxic to mammals.
\nEnglish name: carbendazim
\nMolecular formula
\n1. Chemical name: N-(2-benzimidazoleyl)-carbamate methyl ester
\nChinese aliases: Befenti; Methyl-1H-2-benzimidazole carbamate; N-(2-benzimidazole) carbamate methyl ester; N-(2-benzimidazole) carbamate methyl ester; Methyl-benzimidazole-2-carbamate methyl ester
\nEINECS number 234-232-0
\n2. Molecular formula: C9H9N3O2
\nCA No.: 10605-21-7
\nMolecular weight: 191.2
\nCharacteristics
\nThis product is an odorless powder, which begins to sublimate at 215-217\u00b0C, melts above 290\u00b0C, and decomposes at 306\u00b0C.
\nInsoluble in water, slightly soluble in acetone, chloroform, and other organic solvents. Soluble in inorganic acids and acetic acid, and forms corresponding forms
\nsalt, chemically stable.
\nChemical properties
\nThe pure product is a white crystalline solid, with a melting point of 302\u00b0C~307\u00b0C (decomposition), and a density of 1. 45glcm3 (20\u2103)\u3002 Solubility at 24\u00b0C: Water 29 mgL (pH4), dimethylformamide 5 g\/L, slightly soluble in the remaining organic solvents. Below 50\u00b0C, it remains stable for at least 2 years. It decomposes slowly in alkaline solution, accelerates as pH rises, loses activity as pH decreases, and uses 7 as the reference. Stable formation of soluble salts in acids. The technical ingredient is a brown powder. Chemically stable, the technical material is stored in a cool, dry place for 2-3 years, with the active ingredient unchanged. It is low in toxicity to humans and animals, and also low in toxicity to fish.
\nFunction
\nCarbenzami is a highly effective, low-toxicity systemic fungicide with therapeutic and protective effects.
\nIt can effectively prevent and control various crop diseases caused by fungi and is widely used in China, but its residues can cause liver diseases and chromosomal abnormalities, which are toxic to mammals.
\nApplication
\n1. Prevention and control of wheat diseases
\n(1) Wheat smut. Use 100 g of carbendazim active ingredient, add 4 kg of water, and evenly spray 100 kg of wheat seed, then pile and sow for 6 hours. Alternatively, you can mix 156 grams of active ingredients with 156 kg of water, soak 100 kg of wheat seeds for 36~. Then scoop them out and sow them. The solution can be used continuously.
\n(2) Fusarium head blight in wheat. For example, if wheat is first flowered with continuous rainy weather, spray 150~200g of 25% wettable powder per 667 m\u00b2 to 50~80 liters of water. Every 5~7 days, decide whether to spray a second time based on weather conditions and disease progression, with the same dosage as the first.
\n2. Prevention and control of rice diseases
\n(1) Rice blast. Use 37.5~50 g of carbendazim active ingredient per 667 mz, diluted in water as a constant or low-volume spray. To control leaf blast, spray the first spray when the disease center is found in the field, then spray again seven days later. To control panicle blast, spray ~ times at the rice cracking and heading stages.
\n(2) Rice sheath blight. Spray once at the end of tillering and once before heading formation. Spray 37.5~50 grams of carbendazim active ingredient per 667 m\u00b2 into water. When spraying, focus on the rice stems. Rice sclerotinia in small grains. Spray during the stem jointing and heading stages of rice. For every 667 m\u00b2, apply 37.5~50 grams of carbendazim active ingredient and spray 50~80 liters of water. Spray every 5~7 days, for a total of 2~3 applications.
\n3. Prevention and Control of Cotton Diseases: To control cotton standing blight and anthracnose, mix 500 grams of carbendazim active ingredient per 100 kg of seeds with seeds. Alternatively, seed soaking can be used: soak 250 g of carbendazim active ingredient in 250 kg of water, and soak 100 kg of seeds for 24 hours.
\n4. Prevention and control of rapeseed sclerotinia disease: Spray once during flowering and once at the final flowering stage. For every 667 m\u00b2, use 37.5~62.5 grams of carbendazim active ingredient and spray 50~80 liters of water.
\n5. For controlling peanut standing rot, stem rot, and root rot, mix seeds with 50% carbendazim wettable powder. The dosage of seed dressing is 0.5% to 81% of the seed weight, meaning 100 kg of seeds should be coated with 500~1,000 g of 50% carbendazim wettable powder. Alternatively, you can soak the peanut seeds for 24 hours or moisten the seeds with water, then mix them with the same dosage as above.
\n6. For controlling sweet potato black spot, soak seed potatoes in a 20,000-fold solution for 10 minutes, or soak seedling bases in a 30 mg\/kg solution for 3~5 minutes. The solution can be applied continuously 7~10 times.
\n7. Prevention and control of vegetable diseases
\n(1) Early tomato blight. At the early stage, apply 31.3~37.5 grams of carbendazim active ingredient per 667 m\u00b2, sprayed to 50 liters of water. Spray every 7~10 days, and spray continuously for 3~5 times.
\n(2) Cucumber anthracnose. 2 kg of 25% carbendazim wettable powder mixed with 2000 kg of soil and fertilizer, mixed with medicated soil for coverage.
\n8. Prevention and control of fruit tree diseases
\n(1) Pear black spot disease. During the pear tree budding stage, spray 250 times dilution of 25% carbendazim wettable powder, spray the first time, and spray a second time after flower fall. The number of sprays will be determined based on the progression of the disease. Generally, spray 3~4 times, with a 7\u201310 day interval between each application.
\n(2) Peach sores and scabs. Before bagging peaches, spray with 25% carbendazim moist-absorbing H agent diluted 200~400 times, spraying every 7~10 minutes.
\n(3) Apple brown spot disease. After disease appears, spray with 25 c Yocarbendazim W wet powder diluted 250~400 times. Spray once every 7~10 days.
\n(4) Grape white rot, blackhead, anthracnose. After grape leaf unfolding and before fruit coloring, spray 25% Carbenzazim wettable powder at 250~500 times dilution, every 10~15 days.
\n9. Prevention and Control of Flower Diseases: carbendazim has certain preventive effects against dahlia flower rot, rose brown spot, clivia leaf spot, begonia gray spot, orchid anthracnose, leaf spot, and flower powdery mildew. The method is to spray at the early stage of disease onset with 250 times diluted 250% carbendazim. Decide the number of sprays based on the progression of the disease. Spray every 7~10 days.
\n10. Prevent wound rot when propagating succulent cuttings.
\nMixed spray
\nAfter mixing 25% carbendazim wettable powder at 400 times dilution with 40% aluminum triethylphosphonate wettable powder at 200 times dilution, it also helps control downy mildew and white spot on cabbage, mustard greens, radishes, and downy mildew in cabbage.
\nMixing seeds
\nUse 50% carbendazim wettable powder for seed dressing, with dosage varying depending on the disease. The dosage is 0.4% of seed mass to control cabbage brown spot and cabbage anthracnose.
\nRoot irrigation
\nDilute 12.5% enhanced carbendazim solution to 200~300 times dilution, and irrigate the roots at the initial stage of disease, with 100 ml per plant per application, irrigating about every 10 days for 2~3 consecutive irrigations to prevent yellow leaf disease in cabbage and radishes.
\nNotes
\n(1) Mixed with sulfur, mixed amino acids copper, zinc, manganese, magnesium, mancozeb, ammonium feceb, formizal, formizinc, pentachloronitrobenzene, carbendazim, sclerotino, bromochlorothalonil, acetovir, Jinggangmycin, etc.; Can be mixed with sodium sulfasulfon, mancozeb, chlorothalonil, and Wuyi bacteria.
\nDiscontinue use 18 days before vegetable harvest. This agent must not be mixed with strong alkaline or copper-containing agents; it should be used interchangeably with other agents.
\n(2) Do not use carbendazim alone for a long time, nor do they mix with thiophanate-methyl, benzenate-methyl, or similar drugs. In areas where carbendazim resistance develops, increasing the dosage per unit area cannot be used and should be firmly discontinued.
\n(3) Low toxicity. Store in a cool, dry place.
\nSecurity terminology
\nAvoid contact and obtain special instructions before use.
\nIf you have an accident or feel unwell, seek medical attention immediately (if possible, show the label).
\nThis substance and its container must be disposed of as hazardous waste.
\nAvoid releasing it into the environment. Refer to the special instructions\/safety data manual.
\nMechanism of action
\nIt interferes with the formation of the spindle during mitosis of pathogenic bacteria, affecting cell division and exerting a bactericidal effect.
\nTarget for pest control
\nTo control powdery mildew and blight in melons, early blight in tomatoes, anthracnose and blight in beans, and sclerotinia in rapeseed, use 100-200g of 50% wettable powder per mu, diluted with water for spraying, and spray at the early stage of disease onset, spraying twice at 5-7 days apart.
\nTo control gray mold in scallions and chives, spray with 50% wettable powder diluted 300 times; To control sclerotinia in eggplants and cucumbers, as well as anthracnose in melons and beans, and pea powdery mildew, spray with 50% wettable powder diluted 500 times; For controlling sclerotinia in cruciferous vegetables, tomatoes, lettuce, and beans, and gray mold in tomatoes, cucumbers, and beans, spray with a 600-800 times dilution of 50% wettable powder; To control white spot in cruciferous vegetables, cowpea sooty mold, and celery early blight (spot disease), spray with 50% wettable powder diluted 700-800 times. All of the above sprays are first applied in the early stages of illness, with a 7-10 day interval and 2-3 consecutive sprays.
\nTo control tomato wilt disease, mix seeds at 0.3-0.5% of seed weight; To control kidney bean wilt, mix seeds with 0.5% of seed weight, or soak seeds in a 60-120 times dilution for 12-24 hours.
\nTo control seedling stage standing blight and damping disease, use one part of 50% wettable powder evenly mixed with 1000-1500 parts semi-dry fine soil. When sowing, spread medicated soil into the sowing trenches and cover with soil, using 10-15 kg of medicated soil per square meter.
\nTo control wilt disease in cucumbers and tomatoes, and for eggplant verticillium wilt, use 50% wettable powder at 500 times the wave to irrigate the roots, with 0.3-0.5 kg per plant. For severely affected plots, irrigate again after 10 days.
\nIt has a certain effect on controlling peanut growth.
\nImpact
\nUsing laboratory simulation methods, the effects of microorganisms, moisture content, and Cd on the degradation dynamics of carbendazim in soil were studied. Results show that the degradation half-life of carbendazim (5.0 mg\u00b7kg-1 and 10.0 mg\u00b7kg-1) in soil is 12.6~13.8 times that of non-sterile conditions under sterilization conditions; The addition of composite degrading microorganisms (Bacillus subtilis, Paracocci, Flavobacterium, and Pseudomonas) significantly shortened the degradation half-life of carbendazim in soil (32.1%~37.1%); When soil moisture content increases from 40% field holding capacity to 60% or 80%, carbendazim degradation half-life is shortened by 46.2% or 74.0%; The addition of low concentrations of Cd (5.0 mg\u00b7kg-1) significantly shortened the degradation half-life of carbendazim in soil (32.1%~52.4%), while high concentrations of Cd (50 mg\u00b7kg-1) extended the degradation half-life of carbendazim (92.6%~103.0%); For soils with added complex degrading microbial populations, the addition of low concentrations of Cd (5.0 mg\u00b7kg-1) also significantly shortened the half-life of carbendazim degradation in soil (34.0%~34.4%), while high concentrations of Cd (50 mg\u00b7kg-1) extended the half-life of carbendazim degradation (74.4%~109.4%). Research shows that indigenous microorganisms play an important role in the degradation process of carbendazim, The carbendimis-degrading microbial community, higher soil moisture, and low concentrations of Cd also promote the degradation of carbendazim in soil<\/p>\n","protected":false},"excerpt":{"rendered":"
Carbendazim is also known as Cotton Weiling or Benzimidazole No. 44. Carbenzazim is a broad-spectrum fungicide that is effective in controlling diseases caused by fungi in various crops (such as Haplenomycetes and Polycystis). It can be used for foliar spraying, seed treatment, and soil treatment. It can effectively prevent and control various crop diseases caused by fungi and is widely used in China, but its residues can cause liver diseases and chromosomal abnormalities, which are toxic to mammals. English name: carbendazim Molecular formula 1. Chemical name: N-(2-benzimidazoleyl)-carbamate methyl ester Chinese aliases: Befenti; Methyl-1H-2-benzimidazole carbamate; N-(2-benzimidazole) carbamate methyl ester; N-(2-benzimidazole) carbamate methyl ester; Methyl-benzimidazole-2-carbamate methyl ester EINECS number 234-232-0 2. Molecular formula: C9H9N3O2 CA No.: 10605-21-7 Molecular weight: 191.2 Characteristics This product is an odorless powder, which begins to sublimate at 215-217\u00b0C, melts above 290\u00b0C, and decomposes at 306\u00b0C. Insoluble in water, slightly soluble in acetone, chloroform, and other organic solvents. Soluble in inorganic acids and acetic acid, and forms corresponding forms salt, chemically stable. Chemical properties The pure product is a white crystalline solid, with a melting point of 302\u00b0C~307\u00b0C (decomposition), and a density of 1. 45glcm3 (20\u2103)\u3002 Solubility at 24\u00b0C: Water 29 mgL (pH4), dimethylformamide 5 g\/L, slightly soluble in the remaining organic solvents. Below 50\u00b0C, it remains stable for at least 2 years. It decomposes slowly in alkaline […]<\/p>\n","protected":false},"author":1,"featured_media":718,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[48],"tags":[],"class_list":["post-776","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fungicides-technical-products"],"acf":[],"yoast_head":"\n