Certis Biologicals Cueva Organic Liquid Copper Bactericide & Fungicide Concentrate, 2.5 GallonsFlowable Liquid Copper Fungicide with Low Load Copper Soap Fixed copper has long been coveted as an excellent broad spectrum fungicide and bactericide. Cueva brings this age old ingredient up to date with this patented flowable liquid formulation. Organic Cueva combines a soluble copper fertilizer with a fatty acid to create a true soap. The fatty acid basis of this formula works two ways: to help the active ingredient of copper get into the fungal or