Articles

SCREENING FOR STRAWBERRY PLANT RESISTANCE TO PHYTOPHTHORA CACTORUM IN A NUTRIENT FILM TECHNIQUE (NFT) SYSTEM

Article number
708_17
Pages
119 – 122
Language
English
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.

Publication
Authors
P. Parikka
Keywords
Fragaria × ananassa, crown rot, screening methods, cultivars
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