ISHS Acta Horticulturae 635: XXVI International Horticultural Congress: Managing Soil-Borne Pathogens: A Sound Rhizosphere to Improve Productivity in Intensive Horticultural Systems
INFLUENCE OF SOIL AND PLANTING MATERIAL ON THE DEVELOPMENT OF STRAWBERRY ROOT ROT |
| Authors: | S. Kukkonen, M. Vestberg, T. Tuovinen, O. Järvinen |
| Keywords: | Fragaria x ananassa, replant problem, Pratylenchus, Cylindrocarpon, Fusarium |
| Abstract:
The black root rot disease complex is a common problem in replanted strawberry fields. We studied the effect of soil and planting material on the development of strawberry root rot. For the study we chose old and young Finnish strawberry fields. As controls we chose fields with no history of strawberry cultivation. Soil samples were collected from the fields before planting strawberries. Strawberry (Fragaria x ananassa) micro plants, cv. ‘Jonsok’, were grown in pots in the soil for two months in a climate chamber. The percentage of black roots was used as a measure of root rot potential for each established strawberry field. The abundance of black roots in the planting material and in field-grown plants was also estimated. Fungi were isolated from roots and identified. Root rot occurred more commonly in the test plants grown in old fields than in young strawberry fields. The number of black roots in fields after 2 to 4 months from establishment correlated with the soil root rot potential, but not with the health of the planting material or with the number of root lesion nematodes (Pratylenchus spp.). Mainly Fusarium sp. and Cylindrocarpon sp. were identified from the damaged roots. | |
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