Cueva fungicide concentrate is a patented, fixed copper fungicide made by combining a soluble copper with a fatty acid to form a true soap. This copper soap fungicide protects plants from a wide range of diseases, including downy and powdery mildews.
*SEE PRODUCT LABEL FOR FULL LIST OF CROPS, PESTS, AND APPLICATION DETAILS*
Application timing
- 01Pre-Planting
- 02At Planting
- 03Early Post-Planting
- 04Vegetative StageApplied
- 05Flowering/BloomingApplied
- 06Fruit Set/Mid-SeasonApplied
- 07Late-SeasonApplied
- 08Post-Harvest
Specifications on file
Product details
- General purpose
- Biocontrol
- Product type
- Biopesticides
- Composition type
- Mineral Based substances
- Science/technology
- Biochemical Technology
- Primary compounds
- Copper octanoate
Crops
- Crop categories
- Horticultural Crops, Permanent Crops, Specialty Crops, Broadacre Crops, Cereal & Oilseed Crops, Row Crops
- Crops
- See Product Label
Application
- Application method
- Aerial Application, Foliar Spray, Ground
- Pests/diseases
- Botrytis (Gray Mold), Downy Mildew, Fire Blight, Powdery Mildew, Sclerotinia (White Mold), See Product Label
+ 1 moreShow less
Alternaria (Leaf Spot)
Mode and benefits
- Mode of action
- Copper soap
- Suggested benefits
- Pest Control, Disease Resistance
Registration
- Registration
- OMRI Listed, Organic, Made in USA, Residue Exempt
- Commercial status
- Commercially Available
Field endorsements (1)
Endorse this product- MD
Mike Devencenzi Agronomist🇺🇸San Joaquin Valley, Pittsburg, CA 94509
5/14/25
As an organic and conventional Pest Management Advisor in California, when we use a fire blight product in apples (and pears), Cueva has become a valuable part of our fire blight strategy. It’s not something we use in every application, but we begin rotating it at 2 quarts per acre after king bloom, and it’s proven to be a strong asset in controlling fire blight. Cueva + other effective bactericide/fungicides, aids in a solid copper-based disease control while still being easy to work with—it mixes well, handles easily in the tank, and doesn’t require a closed mixing/loading system, though we always follow PPE guidelines. One thing we’ve especially noticed is that it is less likely to cause russeting in apples. Overall, Cueva has earned its place in many programs with other conventional and organic usage in apple products as a dependable and user-friendly tool for fire blight management in apple production.
Liked Compatibility with Other Inputs
Used on Apples, Pears

