Greenhouse test for the resistance to root and stem rot of Hypericum perforatum L. accessions

https://doi.org/10.17221/10547-PPSCitation:Kačergius A., Radaitienė D. (2002): Greenhouse test for the resistance to root and stem rot of Hypericum perforatum L. accessions. Plant Protect. Sci., 38: 533-535.
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Root and stem rot caused by soil-borne agent Fusarium avenaceum is a major disease of wild Hypericum perforatum accessions in the field collection of Medicinal and Aromatic Plants (MAP) of the Institute of Botany in Lithuania. These wild accessions of H. perforatum are growing as an initial material for breeding. In 1998–2001 the monitoring of epidemiological situation of field collection of H. perforatum showed differences among accessions considering the resistance to root rot. High intensity of root rot was observed in the third–fourth years of cultivation. The most damaged plants (> 50%) were among the accessions 219, 379, 381, and cv. Zolotodolinskaja. Fungi of the Aspergillus, Cladosporium, Penicillium, Rhizoctonia, and Verticillium genera were associated with H. perforatum roots together with the rot agent Fusarium avenaceum. Seven accessions from Lithuania and cv. Zolotodolinskaja of H. perforatum were tested for the resistance to root rot under greenhouse conditions. Two accessions (219, 381) were highly susceptible to the disease, another two (218, 383) were less susceptible, others were free of the symptoms of root rot. Accessions and single plants, survived after artificial infection, have been selected for further investigations.
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