Chemicalssouthernagdithane-m-45

Dithane M-45

SouthernAg · Mancozeb · EPA Reg 829-286 · Fungicide Document last checked 2026-05-30

About this product

Active ingredient Mancozeb
Manufacturer SouthernAg
Category Fungicide

Full details for Dithane M-45

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. 829-286 — 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. 829-286 →

Dithane M-45 is a broad-spectrum protectant fungicide used to control various fungal diseases on certain vegetables and ornamentals. The active ingredients are Mancozeb (68%), Ethylene bisdithiocarbamate ion (CHNS) (16%), and Manganese (16%). It is designed to be applied as a spray to prevent disease before symptoms appear. It is primarily used outdoors on crops such as tomatoes, cucumbers, potatoes, grapes, and various ornamentals like roses and begonias. When applying, ensure thorough coverage of plant surfaces. Note that this product may stain concrete and masonry surfaces. Users must follow specific PPE requirements, including chemical-resistant gloves, long-sleeved shirts, pants, shoes, and socks, and must wash hands thoroughly after handling. It is important to avoid application during high wind conditions to prevent drift and to follow specific reentry intervals (REI) for treated areas.

Pests covered (3)
Anthracnose, leaf spot, rotDowny mildew, gummy stem mold, microclimatic blightLate blight, early blight, leaf spot
Areas treatable (4)
ChrysanthemumTomatoCucumberPotato

How to treat each type of area 4

Chrysanthemum

Target pest Location Rate Label notes
Anthracnose, leaf spot, rot Outdoor Not specified Apply when symptoms first appear or in early spring/early summer before infection occurs.

Tomato

Target pest Location Rate Unit Label notes
Anthracnose, leaf spot, rot Outdoor 1.5 lb Apply as a spray. Use 1.5 lb Dithane M-45 per acre. Apply when symptoms first appear or at 7 to 10 day intervals.

Cucumber

Target pest Location Rate Unit Label notes
Downy mildew, gummy stem mold, microclimatic blight Outdoor 2 to 3 lb Apply as a spray. Use 2 to 3 lb Dithane M-45 per acre. Apply when symptoms first appear or at 7 to 10 day intervals.

Potato

Target pest Location Rate Unit Label notes
Late blight, early blight, leaf spot Outdoor 1.5 lb Apply as a spray. Use 1.5 lb Dithane M-45 per acre. Apply when symptoms first appear or at 7 to 10 day intervals.

Mixing instructions 1

For pests Label notes
General Use a fixed copper fungicide in tank mix for control of bacterial speck.

Worker safety

Re-entry interval (REI) 24
PPE required Chemical-resistant gloves, long-sleeved shirts, pants, shoes, and socks; wash hands thoroughly after handling; use protective eyewear if necessary.

Timing & weather

Use restrictions 4