Arborjet · fungicide
Phospho-jet: rate per inch, label facts, and uses
Phospho-jet is Arborjet's Phosphorous acid fungicide for trunk injection and foliar spray and soil drench and bark spray. 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
Phospho-jet
- Manufacturer
- Arborjet
- Active ingredient
- Phosphorous acid
- EPA registration no.
- Not an EPA-registered pesticide
- Category
- fungicide
- Application
- trunk injection, foliar spray, soil drench, bark spray
- Frequency
- annual
- Retreatment interval
- 365 days minimum
- Protection
- About 12 months
- Time to effect
- About 14 days
Read the Phospho-jet 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.
5 to 8
- Low
- 21 to 28 mL
- Medium
- 28 to 42 mL
- High
- 35 to 56 mL
9 to 12
- Low
- 35 to 42 mL
- Medium
- 45 to 60 mL
- High
- 63 to 84 mL
13 to 16
- Low
- 49 to 56 mL
- Medium
- 65 to 80 mL
- High
- 91 to 112 mL
17 to 20
- Low
- 63 to 70 mL
- Medium
- 85 to 100 mL
- High
- 119 to 140 mL
21 to 24
- Low
- 77 to 84 mL
- Medium
- 105 to 120 mL
- High
- 147 to 168 mL
25 to 28
- Low
- 91 to 98 mL
- Medium
- 125 to 140 mL
- High
- 175 to 196 mL
29 to 32
- Low
- 105 to 112 mL
- Medium
- 145 to 160 mL
- High
- 203 to 224 mL
33 to 36
- Low
- 119 to 126 mL
- Medium
- 165 to 180 mL
- High
- 231 to 252 mL
37 to 40
- Low
- 133 to 140 mL
- Medium
- 185 to 200 mL
- High
- 259 to 280 mL
41 to 48
- Low
- 147 to 168 mL
- Medium
- 205 to 240 mL
- High
- 287 to 336 mL
Worked examples
Dose per tree
Phospho-jet
8″ DBH
21 to 28 mL low, 28 to 42 mL medium, 35 to 56 mL high (label band 5 to 8 in)
Phospho-jet
14″ DBH
49 to 56 mL low, 65 to 80 mL medium, 91 to 112 mL high (label band 13 to 16 in)
Phospho-jet
24″ DBH
77 to 84 mL low, 105 to 120 mL medium, 147 to 168 mL high (label band 21 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 Phospho-jet
Target pests and diseases on the label (52)
Alternaria Fruit Rot · Alternaria Late Blight · Alternaria Leaf Spot · Anthracnose · Apple Scab · Armillaria Root Rot · Bacterial Blight · Beech Bark Disease · Black Spot · Botryosphaeria Canker · Brown Rot · Bud Rot · Butternut Canker · Canker Diseases · Cercospora Leaf Spot · Cherry Leaf Spot · Citrus Scab · 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 · Hull Rot · 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 · Texas Root Rot · Verticillium Wilt
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 Phospho-jet?
Phospho-jet is a fungicide from Arborjet with Phosphorous acid as the active ingredient. It is applied by trunk injection or foliar spray or soil drench or bark spray.
What is the Phospho-jet rate per inch of DBH?
The label sets the dose by DBH band, not a flat rate per inch. A 8 inch tree takes 21 to 28 mL low, 28 to 42 mL medium, 35 to 56 mL high (label band 5 to 8 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 Phospho-jet be applied?
Label frequency: annual. Minimum retreatment interval 365 days. Expected protection about 12 months. Time to effect about 14 days.
What does Phospho-jet treat?
The label lists 52 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 Phospho-jet 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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