On our last visit to South-America, we learned that Citrus growers are discovering the benefits of copper oxide in the fight against citrus canker (Xanthomonas axonopodis) as they experience that this the most effective copper product against this disease. There is a change from other copper products to copper oxide in citrus. There are several reasons why NORDOX copper oxide is superior against bacterial diseases and fungi. The low particle size gives better coverage and stickability and together with the solubility profile, this creates a long lasting copper reservoir on the plants.