ABSTRACT.


P. M. AUSTIN BOURKE1
 

The climate of the coastal region of La Serena, and the weather of the years 1950-55, is discussed with reference to the occurrence there of potato blight (Phytophthora infestans). The humidity requirements of the disease are met by the frequent wet morning fogs (camanchacas) following nocturnal dew; temperature also plays an important role. Rainfall is only a minor factor. Weather was particularly favourable to the disease in 1951; in the four following years it has been progressively less favourable. the danger of recurrence of suitable weather conditions is stressed.

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1 Director Ayudante del Servicio Meteorológico de Irlanda