Micronutrient - Copper (Cu) is a factor in the reproductive process of plants. It also aids in root metabolism and helps in the utilization of proteins by the plant.

Sources - This element is found in most soils.

Fungicides - Many "organic" fungicide are based on copper compounds.

Note: We have provided some general information and observations on this topic aimed at the home gardener. Before you take any serious action in your landscape, check with your state's land grant university's Cooperative Extension Service for the most current, appropriate, localized recommendations.