MicroSource EDTA Chelated Copper 7.5%, 2.5 GallonsEDTA Chelated Copper 7. 5% Solution from MicroSource helps introduce copper to your roots in a easily to absorb formula. Copper is required for many enzymatic activities in plants and for chlorophyll and seed production. Deficiency of copper can lead to increased susceptibility to diseases like ergot, which can cause significant yield loss in small grains. Features and benefits: EDTA Copper 7. 5 is an EDTA chelated copper solution designed for use in