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    玩时时彩月入100万大神
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    Fungicide
    Position :玩时时彩月入100万大神> Product > Pesticides > Fungicide
    Carbendazim 98TECH 50WP 500SC 75WDG
     

    Carbendazim

    Fungicide

    FRAC  1, B1; benzimidazole

     

     

     

    NOMENCLATURE

    Common name carbendazim (BSI, E-ISO); carbendazime ((f) F-ISO); carbendazol (JMAF)

    IUPAC name methyl benzimidazol-2-ylcarbamate 

    Chemical Abstracts name methyl 1H-benzimidazol-2-ylcarbamate 

    Other names MBC; BMC  CAS RN [10605-21-7]  EEC no. 234-232-0  Development codes BAS 346F (BASF); Hoe 017411 (Hoechst); DPX-E 965 (DuPont) 

     

    PHYSICAL CHEMISTRY

    Mol. wt. 191.2  M.f. C9H9N3O2  Form Crystalline powder.  M.p. 302-307 ºC (decomp.)  V.p. 0.09 mPa (20 ºC); 0.15 mPa (25 ºC); 1.3 mPa (50 ºC); separate study gives <0.0001 mPa (20 ºC)  KOW logP = 1.38 (pH 5), 1.51 (pH 7), 1.49 (pH 9)  Henry 3.6×10-3 Pa m3 mol-1 (calc.)  S.g./density 1.45 (20 ºC)  Solubility In water 29 mg/l (pH 4), 8 mg/l (pH 7), 7 mg/l (pH 8) (24 ºC). In dimethylformamide 5, acetone 0.3, ethanol 0.3, chloroform 0.1, ethyl acetate 0.135, dichloromethane 0.068, benzene 0.036, cyclohexane <0.01, diethyl ether <0.01, hexane 0.0005 (all in g/l, 24 ºC).  Stability Decomposes at m.p.; stable for at least 2 y below 50 ºC. Stable after 7 d at 20 000 lux. Slowly decomposed in alkaline solution (22 ºC); DT50 >350 d (pH 5 and pH 7), 124 d (pH 9). Stable in acids, forming water-soluble salts.  pKa 4.2, weak base 

     

    APPLICATIONS

    Biochemistry Inhibits beta-tubulin synthesis.  Mode of action Systemic fungicide with protective and curative action. Absorbed through the roots and green tissues, with translocation acropetally. Acts by inhibiting development of the germ tubes, the formation of appressoria, and the growth of mycelia.  Uses Control of Septoria, Fusarium, Erysiphe and Pseudocercosporella in cereals; Sclerotinia, Alternaria and Cylindrosporium in oilseed rape; Cercospora and Erysiphe in sugar beet; Uncinula and Botrytis in grapes; Cladosporium and Botrytis in tomatoes; Venturia and Podosphaera in pome fruit and Monilia and Sclerotinia in stone fruit. Application rates vary from 120-600 g/ha, depending on crop. A seed treatment (0.6-0.8 g/kg) will control Tilletia, Ustilago, Fusarium and Septoria in cereals, and Rhizoctonia in cotton. Also shows activity against storage diseases of fruit as a dip (0.3-0.5 g/l). Formulation types OP; SC; SL; WG; WP; Seed treatment.  Compatibility Incompatible with alkaline materials. 

     

    ANALYSIS

    Product analysis by u.v. spectrophotometry or hplc (CIPAC Handbook, 1998, H, 61). Residues in crops determined using methods for benomyl, hplc (J. J. Kirkland et al., J. Agric. Food Chem., 1973, 21, 368; Pestic. Anal. Man., 1979, II; J. E. Farrow et al., Analyst (London), 1977, 102, 752) or fluorimetry or colorimetry of derivatives (H. L. Pease & J. A. Gardiner, J. Agric. Food Chem., 1969, 17, 267; N. Aharonson & A. Ben-Aziz, J. Assoc. Off. Anal. Chem., 1973, 56, 1330). 

     

    MAMMALIAN TOXICOLOGY

    Reviews 74, 76  Oral Acute oral LD50 for rats 6400, dogs >2500 mg/kg.  Skin and eye Acute percutaneous LD50 for rabbits >10 000, rats >2000 mg/kg. Non-irritating to skin and eyes (rabbits). Not a skin sensitiser (guinea pigs).  Inhalation LC50 (4 h) for rats, rabbits, guinea pigs or cats, no effect with suspension (10 g/l water).  NOEL (2 y) for dogs 300 mg/kg diet, corresponding to 6-7 mg/kg b.w.  ADI (JMPR) 0.03 mg/kg b.w. [1995].  Other Acute i.p. LD50 for male rats 7320, female rats 15 000 mg/kg.  Toxicity class WHO (a.i.) U  EC classification R68 

     

    ECOTOXICOLOGY

    Birds Acute oral LD50 for quail 5826-15 595 mg/kg.  Fish LC50 (96 h) for carp 0.61, rainbow trout 0.83, bluegill sunfish >17.25, guppy >8 mg/l.  Daphnia LC50 (48 h) 0.13-0.22 mg/l.  Algae EC50 (72 h) for Scenedesmus subspicatus 419, Selenastrum capricornutum 1.3 mg/l.  Bees LD50 (contact) >50μg/bee.  Worms LC50 (4 w) for Eisenia foetida 6 mg/kg soil. 

     

    ENVIRONMENTAL FATE

    EHC 149 (WHO, 1993).  EHC 149 concludes that, although highly toxic to aquatic organisms, low bioavailability in surface waters makes it unlikely this toxicity will occur in the field.  Animals In male rats, following a single oral administration of 3 mg/kg, 66% was eliminated in the urine within 6 hours.  Plants Readily absorbed by plants. One degradation product is 2-aminobenzimidazole.  Soil/Environment 2-Aminobenzimidazole has been found as a minor metabolite. DT50 in soil 8-32 d under outdoor conditions. Carbendazim decomposes in the environment, DT50 6-12 mo on bare soil, 3-6 mo on turf, and 2-25 mo in water under aerobic and anaerobic conditions, respectively. It is mainly decomposed by micro-organisms. Koc 200-250. 

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  • 陈伟霆《一笔江湖》MV上线 走进追寻自我的快意江湖陈伟霆 一笔江湖 2019-10-13
  • 一处失信处处受限 银川出台意见严惩失信被执行人 2019-10-12
  • 有的课靠抢有的课没人上 高校课堂为何冷热不均? 2019-10-09
  • 十九大精神进校园:风正扬帆当有为 勇做时代弄潮儿 2019-10-08
  • 市场经济就是一种唯利是图的经济,是一种波动、走极端的经济,新时期的发展方式与结果就是如 此。那么指望市场经济来解决需要与不平衡的矛盾,对症下药了吗? 2019-10-08
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