As a systemic fungicide, Phostrol® provides effective control of various plant diseases including black spot, scab and downy mildew. Phostrol is a proven performer against Phytophthora and Pythium associated with stem and canker blight. Plus, Phostrol offers multiple application method options and is tank-mix compatible with many pesticides.

Product Brochure
SDS, Label & State Info
Poinsettias Early Disease Control
Rotation Options for Poinsettia Crop Protection
Turf Disease Chart
Greenhouse Edibles Disease Spectrum Chart

at-a-glance info

EPA REG. NO.: 55146-83
ACTIVE INGR.: mono- and dibasic sodium, potassium and ammonium phosphites (53.6%)
FORMULATION: liquid
CHEM. FAMILY: phosphite
FRAC NO.: 33
SIGNAL WORD: caution
RESTRICTED: no
PACKAGE SIZE: 2.5 gal container (2 per case)

KEY USES

  • Annual and perennial flowers 
  • Bedding plants 
  • Cool- and warm-season turfgrasses 
  • Deciduous and evergreen trees and shrubs 
  • Foliage plants 
  • Golf courses 
  • Groundcovers 
  • Landscape 

KEY DISEASES CONTROLLED

  • Brown patch (suppression only)
  • Dollar spot
  • Fairy ring
  • Rust
  • Take-all patch

(See product label for complete list)

Multiple points of defense

  • Multi-site mode of action 
  • True systemic mobility in the plant, moving both up and down in the plant’s conductive tissue 
  • Enhances plant’s natural defense mechanisms
  • Decreases plant stress 

mixing and application options

  • Tank-mix compatible with most pesticides
  • Full chemigation label

 

application recommendations 

TURF 

Use Phostrol® for the effective control of Pythium and damping-off diseases of turf grasses on golf courses, parks, commercial landscapes, commercial turf production and sod farms. When conditions favor disease, begin preventive applications and repeat at indicated intervals per label. Use higher rate of application when disease pressure is severe. 

LANDSCAPE, GOLF COURSE, NURSERY, FORESTRY AND PARK APPLICATIONS* 

Use Phostrol for effective control of Phytophthora and Pythium diseases associated with stem and canker blight (sudden oak death, Phytophthora ramorum), beech decline and general tree decline syndromes in landscapes, nurseries, golf courses, forests and parks. Apply Phostrol to plants such as, but not limited to, beech, cedar, chestnut, crabapple, dogwood, elm, fir, hawthorn, juniper, linden, monterey pine, oaks (coastal, live, shreve, black, canyon), ornamental pear, pyracantha, sweet birch, sweet gum, white pine, white cedar and willow. 

Make applications before disease development and in conjunction with good cultural management practices. Use higher rate of application when disease pressure is severe. Do not exceed application rates or apply more frequently than stated on label or plant injury may occur. Do not apply to plants that are heat or moisture stressed. Do not apply to plants that are in a state of dormancy. Do not exceed spray intervals or label rates in order to avoid plant injury. 

GRASS GROWN FOR SEED PRODUCTION* 

Use Phostrol for effective control of damping-off and root rot diseases in turfgrasses such as, but not limited to, Bermuda, fescue, bent, blue, rye, zoysia, buffalo and Poa annua. 

*Not labeled for use in California 

See product label for complete directions for use.