Cueva® Copper Concentrate

(10% copper octanoate, Cu₈H₁₆O₂, 1.8% metallic copper equivalent) A soluble copper fertilizer combined with a fatty acid that controls most fungal diseases of plants and vegetables.

Start treatment with copper before symptoms appear, at least 2 weeks before the usual onset of disease or before a forecasted long rainy spell. Repeat application every 7–10 days. Increase the concentration if disease persists. Reapply after heavy rain.

Mix ½–2 gal of concentrate with 100 gal of water, apply 50–100 gal/per acre. For plants susceptible to powdery mildew spray twice a week for the first two weeks after emergence and once a week after that. Formulated for commercial growers. Please see pesticide label here. EPA reg. 67702-2-70051.

ships year-round

8675 Cueva® Copper Concentrate

A: 2.5 gal

OMRI Certificate

$265.00

Shipping

Items shipping from our growing supplies warehouse take 2-4 business days to process.

Additional Information

Copper

Copper is a very effective fungicide, however high levels of copper in plants or in the soil can be damaging.

Plant Protection and Last Resorts

These products come with detailed instructions on their labels. Contact us in case you don’t receive the attached booklet or if the label is illegible.

While we try to stay current with product specifications, product formulations are subject to change without notice.

Use our Sprayers to apply these products. We welcome your suggestions about successful low-impact pest-control methods or products.

Is that pesticide registered in your state?

Each state treats potentially dangerous items differently. Like alcohol and open-carry laws, pesticide registrations are different everywhere. We cannot ship a pesticide to a state where it is not registered.

Before buying or using any pest- or disease-control product, be sure it is registered for use in your state and, if you are a commercial grower, registered for commercial production.

Purdue University has a searchable database of information for most states. You can look up products by name, registration number or active ingredient. Contact information is provided for states that don’t participate in the website.

Click here for a chart summarizing the safety of these pesticides for pollinators.

USDA NOP rule concerning disease and pest control
Caution certified-organic growers:

Before using any of these products for pest or disease control, you must have followed the National Organic Program rule 205.206(e). A product being labeled here as allowed is not sufficient to meet standards for organic certification.

Click here for more information and the complete text of the rule.

Organic Certification

Inoculants, soil amendments, fertilizers, livestock supplies and pesticides are labeled as:
OMRI: Organic Materials Review Institute. Most state certifying agencies, including MOFGA, accept OMRI approval.
MOFGA: Approved for use by Maine Organic Farmers & Gardeners Association Certification Services. Check with your certifier.
WSDA: Listed by the Washington State Department of Agriculture’s Organic Certification division for use in organic agriculture in Washington State. MOFGA has indicated that they will accept products on this list for their certification program. Check with your certifier.
Nat’l List: One-ingredient products on the NOP* List of Allowed Substances (subpart G of the Organic Foods Production Act, sections 205.601-606). Check with your certifier.
AYC: Ask your certifier. Has not been reviewed by a certifier, but the active ingredient is allowed. Ask your certifier.
Not Allowed: A few of the products we list are not allowed for organic production but we think they have a place in sensible agriculture and can be used when certification is not an issue.