TOWARDS A PRACTICAL WARNING SYSTEM FOR FIRE BLIGHT BLOSSOM INFECTION
A system is proposed to evaluate the relative risk of the occurrence of severe fire blight in particular orchards in any given season. This system could be used as a basis for recommending the application of bactericide sprays to prevent blossom infection. The system takes into consideration factors peculiar to individual orchards, which affect host susceptibility and the availability of inoculum, and weather conditions, which affect the dissemination and multiplication of Erwinia amylovora. A tentative model has been developed that combines orchard risk and weather risk to determine overall risk of fire blight. This model will be tested and revised based on disease incidence, weather, and orchard characteristic data collected from 220 orchard blocks in New York State in 1982 and 1983.
Beer, S.V., Schwager, S.J., Norelli, J.L., Aldwinckle, H.S. and Burr, T.J. (1984). TOWARDS A PRACTICAL WARNING SYSTEM FOR FIRE BLIGHT BLOSSOM INFECTION. Acta Hortic. 151, 23-36