PhD defence

PhD defence Misghina Teklu

Title thesis: Quantitative studies on potato genotypes and fodder radish varieties resistant to the root-knot nematode Meloidogyne chitwoodi

Summary

Root-knot nematodes, especially the quarantine pests Meloidogyne chitwoodi and M. fallax, are a threat to the seed potato production in The Netherlands. The two siblings are polyphagous and conventional control using crop rotation is almost impossible. Moreover, the use of nematicides is restricted. Future management of these pests will be based on crop rotations with non/poor and resistant hosts. The availability of these hosts is currently limited and the need to develop and evaluate resistant crops takes priority. Dutch breeders were successful in developing M. chitwoodi resistant potato genotypes and fodder radish varieties. In this thesis, the degree of resistance of these crops was evaluated using population dynamics models. A reliable and scientifically valid routine resistance test for potato breeders was developed. The performance of the resistant crops was also evaluated using relevant yield and quality loss models. This information will be included in the Dutch Decision Support system (DSS) NemaDecideGeo+available on the web-based smart farming platform, Akkerweb.