[Airborne fungi during the last ten years in Sagamihara]

Airborne fungi have been surveyed every week during the 10 years from 1983 to 1992 in Sagamihara. This is a follow up of a 1970 and a 1980 survey at the same sampling station (19.5 m above the ground), using the same gravity potato dextrose agar plate. There were two peak seasons during tsuyu (rainy season; June) and autumn (September to October). The most predominant fungi found, except for yeasts and non-sporulated fungi, were Cladosporium (2 seasons) and Alternaria (more frequently in tsuyu). These were followed by Epicoccum (tsuyu), Aureobasidium, Curvularia (summer), Ulocladium (autumn), Penicillium, Arthrinium, Nigrospora (summer), Fusarium, Trichoderma, Pestalotia in decreasing order of their total frequency throughout the 10 years. The most common fungi found during the most years were different from those found during 1970, particularly in the frequency of Aspergillus and Penicillium, but similar to those during 1980 in Sagamihara as well as in most areas of Japan.