EVALUATION OF APPLE VARIETIES FOR SUSCEPTIBILITY TO ERWINIA AMYLOVORA BY ARTIFICIAL INOCULATION UNDER FIELD CONDITIONS
Fire blight caused by Erwinia amylovora is an endemic and occasionally very destructive disease of apples in southwest Idaho. With the objective of identifying varieties less susceptible to fire blight (shoot blight) under local conditions, 14 commercial apple varieties, one crabapple pollenizer and one rootstock were evaluated during 1997 to 1999 in a field experiment at Parma, Idaho, USA. The apple varieties Arlet, Braeburn, Cameo, Early Spur Rome, BC 2 Fuji, Myra Fuji, Nagafu-6 Fuji, Scarlet Gala, Ginger Gold, Nured Jonathan and Pink Lady, and the rootstock M.26 were classified as highly susceptible. Some inoculated trees in this group were killed by fire blight. The crabapple pollenizer Snowdrift and the apple variety Delicious were less susceptible. Enterprise and Liberty were the least susceptible among the apple varieties evaluated in this study.
Mohan, S.K., Fallahi, E. and Bijman, V.P. (2002). EVALUATION OF APPLE VARIETIES FOR SUSCEPTIBILITY TO ERWINIA AMYLOVORA BY ARTIFICIAL INOCULATION UNDER FIELD CONDITIONS. Acta Hortic. 590, 373-375
Fire blight, bacterial disease, shoot blight, disease resistance