THE ROLE OF METEOROLOGICAL FACTORS IN DETERMINING THE ANNUAL VARIATION OF ALTERNARIA AND CLADOSPORIUM SNORES IN THE ATMOSPHERE OF PALENCIA,1990-1992

A study was made of the daily content of Alternaria and Cladosporium s pores in the atmosphere in Palencia city (Spain) for three consecutive years 1990-1992. Alternaria and Cladosporium represented 55% of the t otal identified spores, presenting an annual distributional pattern of which the maximum values were reached in summer. Multiple regression analyses showed a positive correlation between minimum temperature and Cladosporium spore concentrations, while for Alternaria there was a p ositive correlation with maximum temperature and a negative correlatio n with precipitation. Duncan's multiple range test among means of Alte rnaria data indicated that winds coming from a northeasterly direction were associated with significantly higher concentrations the spores.