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.