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Bifenthrin |
Chemical name: |
(2-methyl[1,1'-biphenyl]-3-yl)methyl 3-(2-chloro-3,3,3-trifluoro-=1-propenyl)-2,2-dimethylcyclopropanecarboxylate |
Molecular weight: |
422.9
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Molecular formular: |
C23H22ClF3O2 |
Mode of action: |
Contact and stomach action |
Uses: |
Effective against a broad range of foliar pests, including Coleoptera, Diptera, Heteroptera, Homoptera, Lepidoptera and Orthoptera; it also controls some species of Acarina. Crops include cereals, citrus, cotton, fruit, grapes, ornamentals and vegetables. Rates range form 5 g a.i./ha against Aphididae in cereals to 45 g/ha against Aphididae and Lepidoptera in top fruit. |
Physical chemistry: |
Composition Material contains≥97% cis-isomer, ≤3% trans-isomer. Form Viscous liquid; crystalline or waxy solid. M.p. 68-70.6℃ V.p.0.024 mPa (25℃)Kowlogp>6 Henry1.02×102 Pa m3 mol-1 (calc.) S.g./density 1.120 (25℃) Solubility In water<1 ug/l. Soluble in heptane and methanol. Stability Stable for 2 y at 25℃ and 50℃(tech). In natural daylight, DT50 255 d; stable 21 d at pH 5-9 (21℃). F.p. 165℃(Tag open cup); 151℃(Pensky Martens closed cup) |
Mammalian toxicology: |
Reviews FAO/WHO 65,67 (see part 2 of the Bibliography). Oral Acute oral LD50 for rats 54.5 mg/kg. Skin and eye Acute percutaneous LD50 for rabbits>2000 mg/kg. Non-irritant to skin; virtually non-irritating to eye(rabbits). No skin sensitization (guinea pigs). NOEL (1 y) for dogs 1.5 mg/kg daily. Non-teratogenic in rats (≤2 mg/kg daily) and rabbits(8 mg/kg daily). ADI (JMPR) 0.02 mg/kg[1992]. Toxicity class WHO(a.i.) ll; EPA(formulation) ll |
Ecotoxicology: |
Birds Acute oral LD50 for bobwhite quail 1800, mallard ducks 2150 mg/kg. Dietary LC50 (8 d) for bobwhite quail 4450, mallard ducks 1280 mg/kg diet. Fish LC50 (96 h) for bluegill sunfish 0.00035, rainbow trout 0.00015 mg/l. Daphnia LC50 (48 h) 0.00015 mg/l. Low solubility in water and high affinity for soil contribute to produce little impact in aquatic systems under field conditions. Bees LD50 (oral) 0.1 ug/bee; (contact) 0.01462 ug/bee.
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