Eotetranychus fagi (Acari: Tetranychidae) was first recorded in Belgium on Fagus sylvatica in Kortrijk in October 2002. In the autumn of 2003 E. fagi was noticed again at several locations in Flanders. Because F. sylvatica is often used as hedge plants in private gardens, it is expected that further spread of this spider mite will occur in the next few years.