Protect your lawn and garden from damaging fungal diseases with Captain Jack’s® Ready-to-Spray Liquid Copper Fungicide. This organic-approved formula effectively controls common issues like powdery mildew, downy mildew, black rot, leaf spot, blight, and peach leaf curl. It’s safe for use on fruits, vegetables, nuts, herbs, flowers, and ornamentals—even up to the day of harvest.
Designed for convenience, this concentrate mixes easily with water and can be applied with a sprayer to thoroughly coat plant surfaces, including the tops and undersides of leaves. Suitable for both dormant and active growing seasons, it provides reliable disease control with repeat applications every 7–10 days as needed.
Product Information
Active ingredient: Copper Octanoate 10.0%
Net Contents: 16 ounces
MFSI SKU: 39-640
Species Controlled
Algae
Alternaria blight
Alternaria brown spot
Angular leaf spot
Anthracnose
Anthracnose (leaf and fruit spot)
Ascochyta leaf and pod spot
Ascochyta leaf blight
Bacterial blast
Bacterial blight
Bacterial canker
Bacterial leaf spot
Bacterial soft rot
Bacterial speck
Bacterial spot
Bacterial stalk rot
Black knot
Black rot
Black spot
Blossom blast
Botrytis (gray mold)
Botrytis blight
Brown rot
Cercospora leaf blight
Cercospora leaf spot
Citrus canker
Citrus scab
Collar rot
Common rust
Coryneum blight
Crown rot
Downy mildew
Early blight
European canker
Fire blight
Flyspeck
Fruit blotch
Gray leaf spot
Gray mold
Greasy spot
Late blight
Leaf blight
Leaf mold
Leaf scorch
Leaf spot
Melanose spot
Monilinia brown rot
Mucor fruit rot
Mycosphaerella leaf spot
Neck rot
Peach leaf curl
Phomopsis cane and leaf spot
Phomopsis leaf blight
Phyllosticta
Phytophthora
Pine needle blight
Powdery mildew
Pseudomonas blight
Purple blotch
Quince rust
Rhizoctonia blight
Rhizopus fruit rot
Ripe rot
Rust
Scab
Sclerotinia (white mold)
Septoria (leaf spots / late blight)
Soft rot
Sooty blotch
Southern leaf blight
Stewart’s wilt
Ulocladium leaf spot
Watermelon bacterial fruit blotch
Web blotch
White mold
White rust
Yellow rust
Refer to label for complete information on use rate and species controlled.
Please refer to the product label for complete information on application, use rates, safety measures, storage, and disposal. Always read the label before use.