Monterey® Liquid Copper Fungicide - 32oz - Ready-to-Use Trigger Spray - OMRI Listed®

Monterey® Liquid Copper Fungicide 32oz — Ready-to-Use | Dormant & Growing Season | Powdery Mildew, Rusts, Black Spot & More

Monterey Liquid Copper Fungicide is a copper-based fungicide for dormant and growing-season disease control on flowers, fruits, and vegetables in home gardens and home greenhouses. Copper ions disrupt fungal enzyme systems and cell membranes on contact — providing effective control of powdery mildew, rusts, black spot, leaf and fruit spot, downy mildew, fruit rot, late blight, and leaf curl. Labeled for use up to the day of harvest. The 32oz ready-to-use trigger spray requires no mixing.

Key Features & Benefits

• Copper-Based Broad-Spectrum Fungicide: Copper ions provide multi-site fungal disruption — an important property for resistance management. The broad-spectrum activity addresses both fungal diseases (mildews, blights, spots) and bacterial diseases (fire blight).
• Dormant & Growing Season Use: Apply as a dormant spray before bud break to reduce overwintering fungal inoculum, or during the growing season to control active disease infections and prevent new outbreaks.
• Broad Disease Spectrum: Controls Powdery Mildew, Rusts, Black Spot, Leaf Spot, Fruit Spot, Downy Mildew, Fruit Rot, Late Blight, and Leaf Curl.
• Day-of-Harvest Safe: Labeled for use on edible crops up to the day of harvest.
• For Homes, Home Gardens & Greenhouses: Designed for residential and small-scale garden and greenhouse use.
• Ready-to-Use 32oz Trigger Spray: No dilution or measuring required — spray directly from the bottle.

Disease Control Spectrum

Controls: Powdery Mildew, Rusts, Black Spot, Leaf Spot, Fruit Spot, Downy Mildew, Fruit Rot, Late Blight, and Leaf Curl. See the product label for the complete pathogen list and application rates.

Frequently Asked Questions

What diseases does Monterey Liquid Copper control?

Monterey Liquid Copper controls Powdery Mildew, Rusts, Black Spot, Leaf and Fruit Spot, Downy Mildew, Fruit Rot, Late Blight, and Leaf Curl — a broad range of fungal and bacterial plant diseases affecting common garden crops and ornamentals.

When should I apply Liquid Copper as a dormant spray?

Apply the dormant spray to trees and shrubs before bud break in late winter or early spring to reduce overwintering fungal and bacterial inoculum that would otherwise infect new growth. This is particularly effective for managing diseases like leaf curl on peach and nectarine trees.

Is Monterey Liquid Copper safe for edible crops?

Yes. Monterey Liquid Copper Fungicide is labeled for use on fruits and vegetables up until the day of harvest. Follow label instructions for application rates and any crop-specific guidance.