Copper

Marijuana Horticulture

by Jorge Cervantes

Ingredients – The compounds – copper sulfate, copper oxychloride, cupric hydroxide and cuprious oxide – a re common forms of fixed copper used as a fungicide and are less phytotoxic than unfixed (pure) copper.

Controls – Gray mold, foliar fungus, anthracnose, blights, mildews, and a number of bacterial diseases.

Caution – Easy to overapply and burn foliage or create a copper excess in the plant.

Mixing – Apply immediately after preparing.

Application – Agitate the mixture often while spraying, so ingredients do not settle out. Preferred temperature range for application is 65-85F.

Persistence – Last two weeks or longer indoors, if not washed off.

Forms – Powder and liquid.

Toxicity – Toxic to fish. Not toxic to birds, bees, mammals.

Safety – Wear a mask and gloves, cover exposed skin and hair.