The event aims to show how the plant disease is perceived as a global threat.
The symposium is a forum aimed at the professional companies that deal with crop protection, distribution, plant health professionals and from the agricultural producers sector.
The theme this year is "Towards Change", looking at the present and future of the national and European plant health system.
Carlos Leon is general coordinator of the symposium. Copa Cogeca is among the speakers.
The plant disease that damages hundreds of commercial edible and ornamental plants broke out in Germany recently after spreading from southern Europe. It has yet to reach Britain.