“…Knowledge of plant pathogen spore trends and their relationship with weather variables can be used not only in the early detection of plant infections, thus allowing a more efficient and reliable use of pesticides (Montesinos et al 1995, Bugiani et al 1996, Dı´az, Iglesias & Jato 1998, but also, combined with clinical data, in the prevention of respiratory allergic diseases, improving diagnosis and treatment (Munuera, Carrion & Navarro 2001). Cladosporium and Alternaria are the most cosmopolitan fungi involved, particularly in temperate regions, due to their almost permanent presence in outdoor and indoor air (Infante et al 1997a, b, D'Amato 1981, Ricci et al 1995.…”