Agri-Mycin 50

CaroVail · Streptomycin Sulfate (Equivalent to 50% · EPA Reg 55146-98 · Fungicide Document last checked 2026-05-30

About this product

Active ingredient Streptomycin Sulfate (Equivalent to 50%

Manufacturer CaroVail

Category Fungicide

Full details for Agri-Mycin 50

Source product label ↗ Open the catalog source label while the local copy is reviewed. Verify the product name, EPA registration number, and revision before use. Source safety data sheet ↗ Open the catalog source SDS while the local copy is reviewed. Verify the exact product and revision before relying on it. EPA registration data Reg. 55146-98 — registry reference, signal word and status.

Applicator discussion

Nothing here is label direction — the label is the law. These are notes from other applicators, moderated before they appear. Check the labeling accompanying the product and applicable state requirements.

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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. 55146-98 →

Agri-Mycin 50 is a fungicidal product containing 65.8% Streptomycin Sulfate (equivalent to 50% streptomycin base). It is used to control various bacterial diseases in a variety of crops, including row crops (potatoes, tobacco), tree crops (apples, pears), vegetable crops (coleys, peppers, tomatoes), and ornamental plants and shrubs. It is effective against diseases such as soft rot, blackleg, wildfire, blue mold, fine blight, bacterial leaf spot, and bacterial wilt. Application methods vary by crop, often involving spraying during specific growth stages like the 2-leaf stage or during bloom. Users must follow specific dilution rates based on the desired concentration (50 to 200 ppm) and the volume of water used. Handling requires specific personal protective equipment (PPE), including long-sleeved shirts, long pants, chemical-resistant gloves made of waterproof material, shoes plus socks, a protective eyewear, and a NIOSH-approved respirator with N, R, or P filter if mists are present. The product has a restricted-entry interval (REI) of 12 hours. Always follow all label directions for mixing, application, and disposal to ensure safety and efficacy.

Pests covered (6)

Soft Rot, BlacklegWildfire, Blue MoldFine BlightBacterial BlightBacterial SpotFire Blight

Areas treatable (8)

PotatoTobaccoApplePear (Except CA)ColeysPeppersTomatoesOrnamental Garden/Trees

How to treat each type of area 8

Potato

Target pest	Location	Rate	Unit	Label notes
Soft Rot, Blackleg	Outdoor	100 ppm	ppm	Soak used pieces in solution for several minutes and then use as citals.

Tobacco

Target pest	Location	Rate	Unit	Dilution	Label notes
Wildfire, Blue Mold	Outdoor	5.1/5 oz per 100 gal or 25 gal	oz/gal	50-200 ppm	Apply first spray when plants are in 2-leaf stage. Additional protection may be obtained by spraying field plants weekly.

Apple

Target pest	Location	Rate	Unit	Dilution	Label notes
Fine Blight	Outdoor	8-16 oz	oz	equivalent to 50-100 ppm	Make first application at 20-30% bloom. Spray every 3-4 days during bloom time. After petal fall, continue applications at 10-14 day intervals.

Pear (Except CA)

Target pest	Location	Rate	Unit	Dilution	Label notes
Fine Blight	Outdoor	8-16 oz	oz	equivalent to 50-100 ppm	Make first application at 20-30% bloom. Spray every 3-4 days during bloom time. After petal fall, continue applications at 10-14 day intervals.

Coleys

Target pest	Location	Rate	Unit	Label notes
Bacterial Blight	Outdoor	200 ppm	ppm	Apply first spray when seedlings are in 2-leaf stage. Continue applications at 4-5 day intervals until transplanted.

Peppers

Target pest	Location	Rate	Unit	Dilution	Label notes
Bacterial Spot	Outdoor	2 2/3 - 5 1/3 oz	oz	equivalent to 50-100 gal(s)	Apply first spray when seedlings are in 2-leaf stage. Continue applications at 4-5 day intervals until transplanted.

Tomatoes

Target pest	Location	Rate	Unit	Dilution	Label notes
Bacterial Spot	Outdoor	2 2/3 - 5 1/3 oz	oz	equivalent to 50-100 gal(s)	Apply first spray when seedlings are in 2-leaf stage. Continue applications at 4-5 day intervals until transplanted.

Ornamental Garden/Trees

Target pest	Location	Rate	Unit	Dilution	Label notes
Fine Blight	Outdoor	2-3 oz	oz	equivalent to 100-300 ppm	Apply in flower and blossom sprays. Apply first spray at start of blossoming period. Continue applications every 3 to 4 days during blossom time.

Mixing instructions 1

For pests	Amount	Per	Finished strength	Label notes
General	50-200	ppm	50-200 ppm	Dilution table provided for 5, 50, 100, and 200 ppm concentrations.

Worker safety

Re-entry interval (REI) 12

PPE required Long-sleeved shirt and long pants; Chemical resistant gloves made of any waterproof material; Shoes plus socks; Protective eyewear; NIOSH approved respirator with N, R, or P filter.

Timing & weather

Apply during bloom for certain crops.
Spray every 3-4 days during bloom for tree crops.

Use restrictions 3

Do not apply after fruit is stable (Ornamentals).
Do not apply in California for certain crops (Pear, Tomato, etc.).
Do not apply to any type of irrigation system.