Pesticides: Copper

Common Brand Names:

Chemical Action and Usages: This fungicide is available in several different formulations including RTU sprays, liquid concentrates, wettable powders and dusts. It is used to control certain fungal and bacterial diseases on annuals, perennials, flowers, vegetables, small fruits, grapes, fruit and shade trees. Copper works by deactivating fungal enzyme systems. It prevents fungal spores from germinating but has no effect on existing fungal diseases. Copper may be used on food crops up to one day of harvest. The Concern brand carries the OMRI™ (Organic Materials Review Institute) seal of approval.

Cautions/Instructions: Read the label carefully of the brand and formulation you have selected. Apply the product according to the instructions on the label. Do not apply the Bordeaux mix during cool, damp weather because it may cause “burning” or “spotting” on the leaves. Do not apply to bodies of water and watch for drift or runoff into the same. Copper can build up in soils over time through repeated usage to levels harmful to plant roots.

Toxicity: Copper is quite caustic if ingested and can cause irritation to the skin and eyes. It is very toxic to fish and other organisms, but non toxic to birds and bees.