Maximum Control, Minimum Environmental Impact A new generation copper fungicide/bactericide designed for farmers who seek a copper that exhibits superior control, minimal copper load, excellent storage & mixing but without the staining.

Mastercop - The Farmer's True Solution

Crop protection

Key Product Benefits:

  • BioRetain - Biologically available which causes retention. Only Mastercop has BioRetain
  • High copper bioavailability results in increased adhesion, cuticle penetration and rain fastness, which increases efficacy with minimal phytotoxicity
  • Instant release of copper ions for faster activity on pathogens present on the leaves
  • Less metallic copper needed, reduces soil loading, this fits well with EPA’s anticipated reduced metallic copper rates per acres
  • Smaller particle size allowing for better leaf coverage
  • Easy-to-handle (true liquid solution), no settling, no clogging, no nozzle wear
  • No blue residue, your crop is left clean
  • Mastercop provides a better-built option for copper use. It simplifies the use of copper while providing reliable bacterial/disease control, minus the hassle.

Field Crops

  • Alfalfa*
  • Corn (Field Corn, Popcorn, Sweet Corn)*
  • Peanut*
  • Potato*
  • Sugar Beet*
  • Wheat*, Barley*, Oats*

*Not for use in California.


  • Grapefruit
  • Kumquat
  • Lemon
  • Lime
  • Oranges
  • Pummelo
  • Tangelo
  • Tangerine

*Not for use in California.

Small Fruits

  • Blackberry (Aurora, Boysen, Cascade, Chehalem, Logan, Marion, Santiam, Thornless Evergreen)
  • Blueberries
  • Cranberry*
  • Currant*, Gooseberry*
  • Raspberry
  • Strawberry

*Not for use in California.

Tree Fruits and Tree Nuts

  • Almonds
  • Apricots
  • Cherry
  • Plum
  • Prune
  • Apple
  • Avocado
  • Banana*
  • Cacao*
  • Coffee*
  • Filbert*
  • Mango*
  • Olives
  • Peach, Nectarine
  • Pear
  • Pecan*
  • Pistachio
  • Quince*
  • Walnuts

*Not for use in California.


  • Bean* (Dry, Green)
  • Beet* (Table Beet, Beet Greens)
  • Carrot
  • Celery, Celeriac
  • Crucifers (Broccoli, Brussels Sprouts, Cabbage, Cauliflower, Collard Greens, Mustard Greens, Turnip Greens)
  • Cucurbits (Cantaloupe, Cucumber, Honeydew, Muskmelon, Pumpkin, Squash, Watermelon)
  • Eggplant
  • Okra*
  • Onion, Garlic
  • Pea
  • Pepper
  • Spinach
  • Tomato
  • Watercress*

*Not for use in California.


  • Grapes
  • Hops*
  • Kiwi*

*Not for use in California.


  • Atemoya*
  • Carambola*
  • Chives
  • Dill
  • Ginseng
  • Guava*
  • Litchi*
  • Macadamia*
  • Mamey* Sapote*
  • Papaya*
  • Parsley
  • Passion Fruit*
  • Sugar Apple* (Annona)
  • Sycamore*

*Not for use in California.

Now OMRI Listed!

Key Targets

Gray Mold, Scab, Rusts, Leaf Spot, Brown Spot, Gray Leaf Mold, Brown Rot Blossom, Powdery Mildew, Blight, Stem and Pod Blight, Frogeye Leaf Spot, White Mold

Group Number


Package Sizes

2x2.5 gal

Active Ingredient

Copper Sulfate Pentahydrate