P. Sobiczewski
The investigations of several workers indicate that the occurrence and development of fire blight are related to weather conditions during the vegetation period and phenological phases of the host plants (Mills 1955; Luepschen, Parker and Mills 1961; Powell 1965, 1968; Thomson et al. 1975; Billing 1976, 1980). Although some warning systems of the disease in the USA and one in Europe have been developed, accurate forecasting of fire blight in various geographical regions is difficult. In Europe, the system worked out for southeast England by Billing is the most widely studied. This system is concerned with the assessment of the theoretical potential for fire blight activity (PFA) determined by the possibility of the multiplication of bacteria, possibility of the occurrence of new infections and the development of the disease. The system is based on the daily minimum and maximum temperatures, rainfall and analyses of phenological data (Billing, 1980). It appears to be valuable in assessment of fire blight risks in different climatic areas (Billing, 1981; Billing and Meijneke, 1981; Meijneke and Teylingen, 1981; Brulez and Zeller, 1981).

The purpose of this work was to study the relationship of weather conditions during the growing season of 2 periods, 1965–1967 and 1980–1982, to the occurrence of fire blight. The analysis was made for the area where the first fire blight focus in Poland was discovered in 1966.

Sobiczewski, P. (1984). STUDY ON FIRE BLIGHT FORECASTING. Acta Hortic. 151, 91-96
DOI: 10.17660/ActaHortic.1984.151.11

Acta Horticulturae