By Johan Desaeger Producing nematode-free plant material is one of the most important steps in nematode management. Many nematodes can hide in plant material such as tubers, bulbs, roots, cuttings and seed. The seed gall nematode (Anguina tritici), a seedborne pest infecting seed heads in wheat and rye, was the first plant-parasitic nematode ever to be described (by Needham in …