A three year (1993-1995) calendar of pollen and Alternaria mould in the atmosphere of south western Sydney.
A calendar was constructed from continuous observations of pollen and Alternaria mould spore counts in south-western Sydney, Australia, during January 1993-December 1995, using a Burkard 7-day volumetric spore trap. Of the total airborne pollen, tree pollen comprised 65%, weeds and herbs 11% and grasses 18%. Unidentified pollen, "other" group, accounted for 6% of the total airborne pollen. The most numerous of the tree pollen was that of the introduced trees cypress (Cupressus spp.) and privet (Ligustrum spp.). Grass pollen was observed in small numbers throughout the winter but showed a rapid increase in spring to peak in mid to late November. Weeds pollinated from early spring through to summer. Alternaria, a risk factor for childhood asthma, occurred mainly in late spring and summer but was present in small numbers intermittently throughout winter.