Agri-Fos Systemic Fungicide

  • 4 Stars
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Protect your plants from disease with this specialty fungicide!

Agri-Fos Systemic Fungicide is a preventative and curative spray used for the control of diseases caused by Phytophthora. Diseases associated with this pathogen include:
  • Sudden oak death (SOD)
  • Downy mildew
  • Pythium (in ornamental plants, bed plants, and turf)
  • Root rot
It also controls fire blight on apples, pears, and ornamentals.

Use Agri-Fos for vegetables, citrus, fruits and nuts, ornamental, landscape, turf, conifers and bedding plants. Apply Agri-Fos as a soil drench, foliar spray, soil incorporation, basal bark treatment, or bare root dip. Please see the product label for application rates as they may vary depending on the crop or application.

Active ingredients: Mono and di-potassium salts of phosphorous acid

Sizes available: 1 Quart, 1 Gallon, and 2-1/2 Gallons
Item # Size Stock Status 1 – 3 4 + Qty
3335Q 1 Quart In Stock $22.95 $21.95
3325G 1 Gallon Out of Stock
Please call for availability
$76.95 $69.95


  • Available in quart, gallon, and 2.5 gallon
  • Active ingredient is Mono- and di-potassium salts of Phosphorous Acid, 45.8%
  • Application rate depends on crop, refer to label for details

Review Summary (Based on 1 Reviews)

4 Stars

Agri Phos arrived quickly Fran from NY wrote November 13, 2013

We appreciated the prompt arrival of Agri Phos when we discovered downy mildew was developing. It was quite effective, getting us through our most susceptible weather conditions. Long term control next year will help us decide if 5 stars would be deserved. Thanks for the quick service!

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