Maximum control with minimum environmental impact. OMRI Listed® copper fungicide/bactericide designed for superior control, minimal copper load, excellent storage and mixing, without the staining.

Mastercop Video

Crop protection

  • BioRetainTM - Allows penetration into plant cuticle for improved performance per pound of AI.

  • High copper bioavailability results in increased adhesion, cuticle penetration and rainfastness, which increases efficacy with minimal phytotoxicity.

  • Instant release of copper ions for faster activity on pathogens present on the leaves.

  • Less metallic copper applied, reducing soil loading, this fits well with EPA’s anticipated reduced metallic copper rates per acre.

  • Easy-to-handle true liquid solution no settling, no clogging, no nozzle wear.

  • No blue residue so your crop is left clean.


To view label and full product information click here.


Label Expansion Press Release

Now OMRI Listed®!

Active Ingredient

Copper Sulfate Pentahydrate

Key Targets

Anthracnose, Bacterial Blast, Brown Rot Blossom Blight, Brown Spot, Cercospora Leaf Spot, Downy Mildew, Early and Late Blight, Gray Mold, Leaf Spot, Phomopsis, Powdery Mildew, Rusts, Scab, Stem Blight

Target Crops

Citrus, Fruit & Vegetables, Pome fruit, Potatoes, Stone fruit, Sugar beets, Tree nuts

Group Number


Packaging Sizes

2 x 2.5 gallons, 265 gallons