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Information @ a Glance

General Information

  • Fosetyl-Al is a broad-spectrum fungicide that acts by inhibiting germination of spores or by blocking development
    of mycelium and sporulation.
  • Fosetyl-Al is a fungicide for various horticultural crops used to control a range of diseases including
    Phytophthora, Pythium and Plasmopara.
  • Fosetyl-Al is considered a strong eye irritant

Analysis Methods

  • The degradation of Fosetyl-Al in soil under aerobic conditions is quite rapid and is due to microbial action.
  • Fosetyl - al is extracted from the whole fruit of peels usig 50/50 mixture of 0.1 hydrochloric acid and acetonitril.
  • Method of analysis was developed to determine the residue of Fosetyl - al in plants.


  • Fosetyl-AI was injected at 4 sites into avocado (Persea americana Mill.) trees in Dade and Collier Counties, Florida for the control of Phytophthora cinnamomi Rands which causes root rot.
  • Metalaxyl, fosetyl-Al, dimethomorph and cymoxanil were applied as a soil drench to evaluate their ability
    to control in vitro and in vivo Phytophthora cactorum and P. citrophthora, agents of crown rot of peach tree.
  • A fungicide namely Aliette WG 800 (80% Fosetyl-Al) was pulverized on tomato(Lycopersicon esculentum Mill.) grown under greenhouse conditions and the likely effects of this fungicide on stomata of tomato were examined.


  • Failures of fosetyl-Al (Aliette) to control hop (Humulus lupulus) downy mildew, caused by Pseudoperonospora humuli, have recently occurred in northern Idaho and Oregon.
  •  The fosetyl-Al concentration effective against 50% of the P. humuli isolates (ED50) from each location was estimated
    from the linearized data.
  • The ED50 values indicate that fosetyl-Al was about one-third as effective against P. humuli isolates from commercial hop yards in northern Idaho and Oregon

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