CLIMATE AND FIREBLIGHT IN THE DAX AREA (1977–1982)
Billing's system 1 (1976) is used from meteorological data collected in this experimental field to determine the potential fire blight activity. This estimated activity has been compared with the actual records of the disease, during six years (1977–1982). Contradictions have not been found, at least during Pear blossom period, between the observed severity of the disease, and the activity expected from the graphs. Conversely, for the summer period, the picture of the disease given by the graphs may conflict with the development of the disease in the orchard.