A method of reducing damage to plant propagation material and plant organswhich grow at a later time by a representative of the class Nematode, whichmethod comprises (I) treating the propagation material with (A) a chelatingagent, and optionally (B) a macrocyclic lactone compound or another pesticide,before the material is sown or planted, or (II) applying (A) a chelatingagent, and optionally (B) a macrocyclic lactone compound or another pesticide,to the locus of the material or the treated material defined in (I) before itsplanting, and/or at its planting and/or during its growth.
