Phostrol is one of the very few phosphorous acids labeled as a fungicide . A neutral pH requires no buffering and allows intergration with many other fungicides . These traits allow for compatibility in tank mixes, making Phostrol an excellent fit for any disease management program.

Major Crop/Use**

  • Almonds, walnuts and other nut crops
  • Asparagus, avocado, leafy vegetables, potatoes, tomato, onion
  • Blueberry, cranberry, citrus, grape
  • Cucurbit crops
  • Hop
  • Ginseng


  • 2 x 2.5 gal/case – 36 cases/pallet
  • 30 gallon drum – 5 drums/pallet
  • Bulk


  • Phosphorous acid salts (53.6%) (equivalent to 6.69 lbs/gal)


**Consult label for additional crop and rate information