HISTORY OF FIRE BLIGHT IN FRANCE 1972/1989, AND ADMINISTRATIVES MEASURES

Afterwards and on an unexpected manner the bacterial pathogen was detected in South West of France on pear trees in 1978.

During the seasons 1982 and 1983 fire blight was reported in Paris area and in the "Val de Loire".

Since the appearance of the first symptoms, the plant protection service has identified all the infected host plants detected by prospection. This statement gives a rather good idea of the relative susceptibility of genus, species and varieties to that bacteria.

The legal procedures described in the paper concerning territory survey, control of commercial exchanges, prophylaxy and eradication measures have widely contributed to limit the geographical disease progression.

In 1989 first symptoms was observed during early spring on pear trees in the South West of France.

The foreseen occurrence of secondary blossom period specially on pear cultivar "Passe Crassane" during may and june must incite to a great vigilance.

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