Quali-Pro · growth regulator
Shortstop 2SC: label facts, timing, and uses
Shortstop 2SC is Quali-Pro's Paclobutrazol 22.3% growth regulator for soil injection and soil drench. What it is labeled for, how it is applied, the timing, and how the PHC Rx label check reads it before a prescription goes out.
Label check
1 warningLast application was 14 days ago. Proceed with a documented override, or reschedule.
Label facts
Shortstop 2SC
- Manufacturer
- Quali-Pro
- Active ingredient
- Paclobutrazol 22.3%
- EPA registration no.
- Not an EPA-registered pesticide
- Category
- growth regulator
- Application
- soil injection, soil drench
- Frequency
- Every 3 years
- Retreatment interval
- 1095 days minimum
- Protection
- About 24 months
- Time to effect
- About 540 days
Read the Shortstop 2SC 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.
Labeled uses
What the label covers
Target pests and diseases on the label (9)
Compaction · Drought Stress · Environmental Stress · Frost/Freeze Damage · General Tree/Shrub Care · Heat Stress · Sunscald · Transplant Shock · Winter Injury
Sensitivity flags
Sugar Maple (do not tap for syrup), Severely stressed 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 Shortstop 2SC?
Shortstop 2SC is a growth regulator from Quali-Pro with Paclobutrazol 22.3% as the active ingredient. It is applied by soil injection or soil drench.
What is the Shortstop 2SC rate?
Shortstop 2SC is applied at the label rate for the method and the host; the app does not carry a DBH rate table for it. Read the label linked on this page and record the rate and total on the application record.
How often can Shortstop 2SC be applied?
Label frequency: Every 3 years. Minimum retreatment interval 1095 days. Expected protection about 24 months. Time to effect about 540 days.
Are there trees Shortstop 2SC should not go in?
The label flags Sugar Maple (do not tap for syrup), Severely stressed trees.
Where do these numbers come from?
The PHC Rx product catalog, built from the Shortstop 2SC 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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