Airborne pollen calendar of Caxias do Sul (Rio Grande do Sul, Brazil), 2001-2002

1. Duso, Maria Vergamini
2. Duso, Leandro
3. Zoppas, Barbara Catarina de Antoni
4. Fernández González, María Delia
5. Valencia Barrera, Rosa María

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Abstract

The pollen concentration in the atmosphere of Caxias do Sul was studied using the volumetric suction Hirst-type sampler (BurkardÆÊ model), during 2001 and 2002. During the study period, 40 pollen types were identified and 18 of these were selected to compose the Pollen Calendar: Amaranthus, Araucaria, Asteraceae, Carya, Cupressaceae,Cyperaceae, Ligustrum, Melastomataceae, Mimosa scabrella, Myrsine, Myrtaceae, Pinaceae, Plantago, Poaceae, Ricinus, Rumex, Sorocea and Urticaceae, which account for 97% of the total pollen content. Clearly distinct pollen seasons were observed, with the highest concentrations of pollen grains in winter and spring.

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