In The Netherlands M. chitwoodi imperils the production of seed, starch and ware potatoes, as they affect tuber quality. Management by crop rotation is complicated as most arable crops are hosts and population dynamic parameters under field conditions are largely unknown.
The best strategy for the management of M. chitwoodi in potato rotations would be the use of crops with a low host status and resistant potato cultivars.
In line with this thinking, research is now directed to the development of M. chitwoodi resistant potato genotypes and green manures crops along with a reliable methods to assess resistance and host status. Sources of resistance have been found in wild, tuber bearing Solanum species. Dutch breeders incorporate these genes into their marketable potato cultivars and need cheap and reliable methods to test their genotypes for resistance. To incorporate the results of resistance testing in an advisory system for M. chitwoodi, they must be based on population dynamic parameters and have prescribed precision and distinctiveness. This paper highlights on the results 4 glasshouse experiments using 8 potato genotypes and proposes a routine test for the Relative Susceptibility estimation of potato genotypes resistant to M. chitwoodi. The method is expected to be reliable and cost effective to help potato breeders screen for resistance against M. chitwoodi.