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General Information
  • Cyfluthrin is a relatively new insecticide that is classified as a synthetic pyrethroid because its chemical structure is a synthetic analog of
    naturally-occurring pyrethrins.
  • Cyfluthrin is a clear liquid, dark amber in color, with an oily to pasty consistency, and has a faint aromatic solvent odor at room temperature.
  • Cyfluthrin is a skin and eye irritant in humans, but overall poisonings from pyrethroid chemicals are rare.


  • The concentrations of cyfluthrin decreased rapidly, with maximum levels between 4 hours to 1 day post application in artificial ponds.
  • Cyfluthrin degrades abiotically through hydrolysis.
  • Cyfluthrin is hydrophobic and has a high KOC. Consequently cyfluthrin has a low tendency to leach in soil. In addition, cyfluthrin mobility during runoff events will be low, except under conditions of high sediment transport.
  • Cyfluthrin is sensitive to breakdown by sunlight.


  • A spectrophotmetric method standardized to quantify cyfluthrin in methanol extracts of soil samples revealed an absorption maximum at 230 nm.
  • An encapsulated formulation of cyfluthrin [60 mg/ml, 0.5 lb/gallon (a.i)] was obtained from Whitmire (St Louis, MO, U.S.A.), and refrigerated for about 5 months at 48C.
  • Cyfluthrin in water is extracted with hexane. After concentrating, the sample is redissolved in hexane and analyzed by gas chromatography using an electron capture detector (ECD).
  • The GC-MS/MS multi-residue method is suitable for monitoring pesticides in fruit preserves at the regulatory levels compliant with the EU DG SANCO criteria for pesticides.


  • The occurrence of cyfluthrin or its metabolites in rotational crops was also investigated. According to the RMS, EFSA(European Food Safety Authority) concludes that residues of cyfluthrin are not expected in rotational and/or succeeding crops provided that the active substance is applied according to the intended GAPs and a plant back interval of at least 38 days is respected for cereals.
  • In California, where pesticide use reporting is more comprehensive than in other states, the amount used in agriculture is much smaller than that used for other purposes.However, agricultural uses are significant: about 10 percent of the U.S. cotton acreage (over a million acres) is treated with cyfluthrin, as is about 60 percent of the U.S. pear acreage.

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