Arbor-OTC

Arborjet · Equivalent to 36.7% · EPA Reg 74578-7 Document last checked 2026-05-30

According to the label From the product label

These details were extracted from this product's label PDF. The label is the law. Confirm every rate, site, restriction and safety requirement against the label before mixing or applying. Check for a state supplemental label; a product may be restricted or prohibited in a state or site even when a rate appears below. · EPA registration data for Reg. 74578-7 →

Arbor-OTC is an injectable antibiotic designed for the control of bacterial diseases in non-food bearing palms. The active ingredient is Oxytetracycline HCl at 0.01%. It is specifically formulated to treat Phytophthora Leaf Rot (also known as Lethal Yellowing) and Texas Phoenix Palm Disease. This product is applied via an injectable device that delivers the antibiotic directly into the palm trunk. The label specifies that the product is for use on non-food bearing palms only; it is not for use on food or medicinal plants. When applying, technicians must use specific personal protective equipment, including long sleeves, long pants, chemical-resistant gloves made of waterproof material, and protective eyewear. The application involves drilling holes into the palm trunk and injecting the solution. It is critical to follow the specific mixing instructions and dilution rates based on the volume of Arbor-OTC used to ensure the correct finished strength for the target palm species. Always follow instructions for cleaning/disinfecting the injection device to prevent cross-contamination between trees.

Pests covered (1)

Phytophthora Leaf Rot (Lethal Yellowing) and Texas Phoenix Palm Disease

Areas treatable (1)

Non-food bearing palms

How to treat each type of area 1

Non-food bearing palms

Target pest	Location	Rate	Dilution	Label notes
Phytophthora Leaf Rot (Lethal Yellowing) and Texas Phoenix Palm Disease	Outdoor	Not specified per tree; depends on dilution	See mixing instructions	Apply 3-4 times annually for continuous protection from Phytophthora diseases. For Texas Phoenix Palm Disease, apply 3 times the amount listed in the table.

Mixing instructions 4

For pests	Location	Amount	Per	Finished strength	Label notes
Phytophthora Leaf Rot and Texas Phoenix Palm Disease	Outdoor	140 grams	1250 mL water	1200 mL yield	Yields 1200 mL of solution; treats approx 500 inches of treated DBH.
Phytophthora Leaf Rot and Texas Phoenix Palm Disease	Outdoor	28 grams	250 mL water	264 mL yield	Yields 264 mL of solution; treats approx 100 inches of treated DBH.
Phytophthora Leaf Rot and Texas Phoenix Palm Disease	Outdoor	2.8 grams	26 mL water	26.4 mL yield	Yields 26.4 mL of solution; treats approx 10 inches of treated DBH.
Phytophthora Leaf Rot and Texas Phoenix Palm Disease	Outdoor	1.4 grams	12.5 mL water	13.2 mL yield	Yields 13.2 mL of solution; treats approx 5 inches of treated DBH.

Worker safety

PPE required Long sleeves, long pants, chemical-resistant gloves made of waterproof material, and protective eyewear.

Timing & weather

Apply 3-4 times annually for continuous protection.

Use restrictions 5

Not for use on food or medicinal plants.
Do not apply to trees that are already dead.
Do not apply to trees that are actively flowering.
Do not apply to trees that are in a state of drought stress.
Do not apply to trees that are in a state of extreme temperature stress.

Label SDS

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Document text and citations

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Reference only. Always read and follow the most current EPA-approved label on the product container. State and local restrictions may apply that are not reflected in this digitised copy. Verify the EPA registration number and revision date before use.