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Nintety-six accessions within the Brassicaceae were inoculated with a wide range of isolates of Phoma lingam and screened for resistance. Initially, seedlings were sprayed with a spore suspension. The material with the highest level of resistance according to the seedling test was further inoculated with pycnospores in cotyledons, adult leaves and stem bases. All representatives with resistance at the cotyledon stage were found to be resistant at the adult, too. A large variability in virulence was found among the different isolates of the pathogen demonstrating the importance of using a broad spectrum when screening for resistance. An evaluation based on the response to 17 different P. lingam isolates revealed that five accessions of B. juncea, two of B. nigra and two of B. carinata could be classified as resistant. Although all these representatives contain the B genome of Brassica, there were other accessions with the B genome that were sensitive

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