title: Volumetric studies of aeroallergen prevalence. I. Pollens of weedy forbs at a midwestern station.
abstract: Volumetric levels of pollens derived from broad-leaved herbaceous plant species heve been determined at a midwestern urban site with suction and rotating arm samplers. The resulting data confirm an abundance of ragweed and nettle emanations but suggest that those of plantains, chenopods, and amaranths achieve modest levels, at best, despite their prominence in gravity slide recoveries. Regular seasonal occurrence periods for pollens, including those of entemophilous composites, the hophemp group, wilg grape, and the mustard and pea families, were evident in volumetric recoveries. In general, prevalence peaks of the most prominent pollen types correlated with intermediate, rather than extreme, values for air speed and relative humidity.
mesh_terms: D002940:Circadian Rhythm; D004782:Environmental Health; D006813:Humidity; D019684:Magnoliopsida / Q000276:immunology*; D008824:Michigan; D011058:Pollen / Q000032:analysis*; D014919:Wind