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  Authority of Polish Society of Allergology

vol 13. no 3. September 2008  

 Original articles
The pollination of early-blooming trees and bushes in the Łódź area in 2008 in comparison to earlier seasons

Introduction. The pollen season in Poland usually begins in February but the pollination of trees and bushes in early spring is very changeable and weather-dependent.
Aim of the study. The aim of the study was to assess the pollination of early-blooming trees and bushes, including hazel, poplar, and willow in Łódź area in 2008, with special regard to the beginning of pollination, maximum daily pollen count and the total yearly pollen count.
Material and methods. The studies were conducted using the volumetric method with the Lanzoni apparatus. The beginning of pollination was determined using the so-called 1% method.
Results. In 2008, the pollination of trees and bushes began very early. A long-term perspective shows that the pollination of hazel in 2008 was the earliest in the recent 8 years – 1 February, and alder – 6 February. Maximum daily pollen count for hazel and alder were average in comparison to previous years. The total pollen fall for hazel was 304 grains/season and for alder over 4100 grains/season. No significant pollination interruption due to the weather change was observed in the pollination of early-blooming trees in 2008. A significant increase in the total pollen count and maximum daily count of alder and poplar was observed.
Conclusions. Continuous acceleration of the beginning of the tree blooming period occurring in recent years requires monitoring from early January, especially with regard to increased intensity of alder and hazel pollination.

keywords: olsza, leszczyna, topola, przebieg pylenia, stężenie pyłku roślin, alder, hazel, poplar, pollination season, pollen count

pages: from 161 to 171

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