Article · Wikipedia archive · Last revised Jul 3, 2026

Fludioxonil

Fludioxonil is a synthetic phenylpyrrole chemical introduced by Ciba-Geigy in 1993 for use as a non-systemic fungicide. It is a structural analog of the natural fungicide pyrrolnitrin.

Last revised
Jul 3, 2026
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≈ 2 min
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Citations
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Source
Fludioxonil
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source ↗
Names
Preferred IUPAC name
4-(2,2-Difluoro-2H-1,3-benzodioxol-4-yl)-1H-pyrrole-3-carbonitrile
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.125.684
KEGG
UNII
  • InChI=1S/C12H6F2N2O2/c13-12(14)17-10-3-1-2-8(11(10)18-12)9-6-16-5-7(9)4-15/h1-3,5-6,16H
    Key: MUJOIMFVNIBMKC-UHFFFAOYSA-N
  • InChI=1/C12H6F2N2O2/c13-12(14)17-10-3-1-2-8(11(10)18-12)9-6-16-5-7(9)4-15/h1-3,5-6,16H
    Key: MUJOIMFVNIBMKC-UHFFFAOYAI
  • c1cc(c2c(c1)OC(O2)(F)F)c3c[nH]cc3C#N
Properties
C12H6F2N2O2
Molar mass 248.189 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Fludioxonil is a synthetic phenylpyrrole chemical introduced by Ciba-Geigy (now Syngenta) in 1993 for use as a non-systemic fungicide. It is a structural analog of the natural fungicide pyrrolnitrin.

It is used for the treatment of crops, particularly cereals, fruits and vegetables, and ornamental plants. It is often used in combination with another fungicide such as Cyprodinil. There was a particularly bad crop failure due to multiresistant B. cinerea in strawberry in Florida in 2012; in that year and many other years, fludioxonil was the only fungicide still providing any protection.1

Its mode of action is to inhibit transport-associated phosphorylation of glucose, which reduces mycelial growth rate.2 Fludioxonil is used against Fusarium, Rhizoctonia, Alternaria, Botrytis cinerea, and Stromatinia cepivora.

Nectarines treated with fludioxonil source ↗

Brand names include seed treatments: Celest, Agri Star Fludioxonil 41 ST, Dyna-shield Fludioxonil, Maxim 4 FS, and Spirato 480 FS, as well as foliar applications: Switch (fludioxonil + cyprodinil).3

Environmental and Health hazards

It is toxic to fish and other aquatic organisms.4

See also

See also

References

References

  1. "Fludioxonil (Ref: CGA 173506)".
  2. "What's on your seed?" (PDF). Integrated Pest and Crop Management, University of Wisconsin-Madison.
  3. Paranjape, Kalyani, Vasant Gowariker, V. N. Krishnamurthy, and Sugha Gowariker. The Pesticide Encyclopedia. CABI, 2014.