Mauget · fungicide
ArborFos: rate per inch, label facts, and uses
ArborFos is Mauget's Phosphorous Acid fungicide for trunk injection. The dose is set by DBH band on the label, not by a flat rate per inch, and the table below is the app's copy of that label table. What it is labeled for, when it goes in, and how the label check reads it.
Label check
1 warningLast application was 14 days ago. Proceed with a documented override, or reschedule.
Label facts
ArborFos
- Manufacturer
- Mauget
- Active ingredient
- Phosphorous Acid 45.8%
- EPA registration no.
- 7946-26
- Category
- fungicide
- Application
- trunk injection
- Frequency
- As needed, typically not more than once every 30 days.
- Retreatment interval
- 365 days minimum
- Protection
- About 12 months
- Time to effect
- About 1 days
Read the ArborFos label (manufacturer PDF). The label is the legal document; this page is the app's copy of it.
Application months
per labelThe app does not carry a month window for this product; the pest’s treatment page sets the timing.
Rate table
Dose per tree by DBH band
Milliliters of product per tree, from the label table the app's calculator uses. Low, medium, and high are the label's pressure tiers; the treatment page for the pest says which one applies.
4 to 6
- Low
- 10 to 15 mL
- High
- 15 to 23 mL
7 to 9
- Low
- 15 to 23 mL
- High
- 23 to 34 mL
10 to 12
- Low
- 25 to 30 mL
- High
- 38 to 45 mL
13 to 15
- Low
- 33 to 38 mL
- High
- 49 to 56 mL
16 to 19
- Low
- 40 to 48 mL
- High
- 60 to 71 mL
20 to 24
- Low
- 50 to 60 mL
- High
- 75 to 90 mL
25 to 30
- Low
- 63 to 75 mL
- High
- 94 to 113 mL
31 to 36
- Low
- 78 to 90 mL
- High
- 116 to 135 mL
37 to 42
- Low
- 93 to 105 mL
- High
- 139 to 158 mL
Worked examples
Dose per tree
ArborFos
8″ DBH
15 to 23 mL low, 23 to 34 mL high (label band 7 to 9 in)
ArborFos
14″ DBH
33 to 38 mL low, 49 to 56 mL high (label band 13 to 15 in)
ArborFos
24″ DBH
50 to 60 mL low, 75 to 90 mL high (label band 20 to 24 in)
For the tree in front of you, with injection sites and the pest tier applied, use the tree injection rate calculator.
Labeled uses
What the label covers
Treatment guides that use ArborFos
Target pests and diseases on the label (46)
Alternaria Leaf Spot · Anthracnose · Apple Scab · Armillaria Root Rot · Bacterial Blight · Black Spot · Botryosphaeria Canker · Brown Rot · Bud Rot · Butternut Canker · Canker Diseases · Cercospora Leaf Spot · Cherry Leaf Spot · Collar Rot · Crabapple Scab · Crown Rot · Cytospora Canker · Dothistroma Needle Blight · Downy Mildew · Entomosporium Leaf Spot · Fire Blight · Foot Rot · Fusarium · General Tree/Shrub Care · Hypoxylon Canker · Leaf Blight · Leaf Spot · Nectria Canker · Needle Cast Diseases · Pecan Scab · Phomopsis Blight · Phytophthora Bleeding Canker · Phytophthora Root Rot · Pine Pitch Canker · Pitch Canker · Powdery Mildew · Pythium · Rhabdocline Needle Cast · Root Rot · Scab · Seiridium Canker · Sudden Oak Death · Swiss Needle Cast · Sycamore Anthracnose · Tar Spot · Verticillium Wilt
Labeled hosts
Conifers · Oak · Elm · Maple · Sycamore · Palm · Fruit Trees · Nut Trees · Ornamental Trees
The label check runs this list against the host, the pest, the month, the dose, and the last application on the tree before a prescription goes out.
FAQ
Questions arborists ask
What is ArborFos?
ArborFos is a fungicide from Mauget with Phosphorous Acid as the active ingredient, EPA registration number 7946-26. It is applied by trunk injection.
What is the ArborFos rate per inch of DBH?
The label sets the dose by DBH band, not a flat rate per inch. A 8 inch tree takes 15 to 23 mL low, 23 to 34 mL high (label band 7 to 9 in). The PHC Rx calculator reads the band for the tree in front of you and sets the number of injection sites.
How often can ArborFos be applied?
Label frequency: As needed, typically not more than once every 30 days. Minimum retreatment interval 365 days. Expected protection about 12 months. Time to effect about 1 days.
What does ArborFos treat?
The label lists 46 target pests or diseases. The treatment guides on this site that use it: sycamore anthracnose, apple scab, fire blight, rhizosphaera needle cast. Each guide has the rate, the timing window, and the alternatives.
Where do these numbers come from?
The PHC Rx product catalog, built from the ArborFos label linked above, and synced to this page from the app. The label is the legal document; if the two disagree, the label wins and the catalog gets fixed.
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