ISHS Acta Horticulturae 708: V International Strawberry Symposium
SCREENING FOR STRAWBERRY PLANT RESISTANCE TO PHYTOPHTHORA CACTORUM IN A NUTRIENT FILM TECHNIQUE (NFT) SYSTEM |
| Author: | P. Parikka |
| Keywords: | Fragaria × ananassa, crown rot, screening methods, cultivars |
| Abstract:
In 1990, crown rot (Phytophthora cactorum) caused severe damage to straw-berry plants in Finland. Since 1993, plant resistance to the pathogen has been tested with a crown test using small fresh runner plants. A nutrient film technique (NFT) system was studied for screening for resistance starting in 1998 at MTT Agrifood Research Finland. The two screening methods were compared by inoculating the same strawberry cultivars using the crown test and NFT test under similar greenhouse con-ditions. Most test cultivars showed the same level of resistance with both test methods. Cultivars that had high resistance in the crown test did not show wilt symptoms in the NFT-system. The inoculum of P. cactorum was added as sporangia to the circulating irrigation water which made it possible to spread inoculum rapidly and evenly to all plants tested. The NFT-system produced results as rapidly as the crown test when small fresh runner plants were used. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
