Copper is an essential natural micronutrient. However, copper used as a plant protection product may have long-term consequences due to its accumulation in the soil. Limitations on copper use have therefore been defined in organic farming (Regulation EC 889/2008). In the light of new developments and evidence, the European Commission has planned to assess whether further restrictions are needed in the quantities of copper permitted.

Downy mildew of grapevine is one of the most devastating diseases in viticulture. The disease-causing pathogen Plasmopara viticola finds especially good conditions in humid years with frequent rainfalls and can then lead to severe damage in the vineyard. This is particularly problematic because all traditional Vitis vinifera varieties cultivated in European countries have a high susceptibility to this pathogen.

A RELACS project - The overall aim is the development of novel copper alternatives and integration in crop protection strategies to replace copper (no copper strategies) or to limit the use of copper (low copper strategies) in organic plant production.

The reduction of copper-based plant-protection products with the final aim of phasing out has a high priority in European policy, as well as in organic agriculture. Our survey aims at providing an overview of the current use of these products in European organic agriculture and the need for alternatives to allow policymakers to develop strategies for a complete phasing out.