SUSCEPTIBILITY OF STRAWBERRY VARIETIES TO CROWN ROT (PHYTOPHTHORA CACTORUM) IN GREENHOUSE TESTS
The susceptibility of 55 strawberry varieties to crown rot, caused by Phytophthora cactorum, was evaluated in the greenhouse at MTT Plant Protection in 1993-2001. Crowns of fresh runner plants were wounded and inoculated with P. cactorum mycelium. The principal strawberry cultivars grown in Finland, Jonsok, Senga Sengana, Polka, Honeoye, Bounty and Korona, were tested several times. Jonsok was very susceptible to crown rot and Polka, Korona and Honeoye proved to be quite susceptible, too. Some cultivars were less resistant when tested during the summer months than in winter. Bounty and Senga Sengana showed high resistance during winter but in summer their resistance decreased from high to moderate. Autumn and spring are more suitable times for screening resistance than summer and winter. For subsequent testing Jonsok was chosen as a susceptible and Sara (Fragaria vescana) as a resistant control for comparative evaluation of resistance.
Parikka, P. (2003). SUSCEPTIBILITY OF STRAWBERRY VARIETIES TO CROWN ROT (PHYTOPHTHORA CACTORUM) IN GREENHOUSE TESTS. Acta Hortic. 626, 183-189
Fragaria x ananassa, crown test, disease resistance, screening