Dossier
Hay fever and pollen
Hay fever is an allergic reaction that is caused by pollen from trees, grasses and herbaceous plants. When this pollen is dispersed by the wind, people with hay fever suffer from sneezing, red and itchy eyes and a stuffy nose.
Weather conditions determine when 'hay fever plants' flower and how much pollen they release into the atmosphere. Every year, the progression of hay fever symptoms can differ. The daily pollen concentration in the atmosphere in the Netherlands is measured by the Leiden University Medical Center (LUMC) and Elkerliek Hospital in Helmond.
As part of the Nature’s Calendar observation programme, secondary school students and volunteers keep track of when various hay fever plants begin flowering. The students who conduct observations are also involved with the GLOBE Programme, an international education programme on the environmental sciences established in 1995 by Al Gore.
Knowledge about hay fever is limited
Ambrosia
One plant species that is known world-wide for causing hay fever symptoms is Ambrosia. This species, which is an exotic in the Netherlands, produces large amounts of strongly allergenic pollen. Moreover, the plant flowers late in the year, so the hay fever season for people who are sensitive to Ambrosia can be up to two months longer. Ambrosia originated from North America and has become widespread in the Netherlands because its seeds are unintentionally present in birdseed and wildflower mixtures. By removing plants before they begin flowering, nuisance from the pollen can be prevented, and the species is less likely to spread.
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Publications on hay fever and pollen
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Enzyme assisted extraction of rice bran protein
Wageningen University. Promotor(en): R.M. Boom, co-promotor(en): A.E.M. Janssen - Wageningen: Wageningen University - ISBN: 9789464479348 -
Boerderij van de Toekomst in Zuid-Limburg?
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Where do we go from here? : Navigating power inequalities between development NGOs in the aid system
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Visible and near infrared spectroscopy for predicting soil nitrogen mineralization rate : Effect of incubation period and ancillary soil properties
Catena (2024), Volume: 235 - ISSN 0341-8162 -
Extreme temperaturen brengen natuur naar voorlente, 'dit is niet goed'
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Is Africa still rising?
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Warme winter
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Begrotingsrichtprijzen voor peer wederom gunstig
De Fruitteelt (2024), Issue: 2 - ISSN 0016-2302 - p. 19-21. -
Praktijkervaringen van ondernemers met agroforestry
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Where do we go from here? Video presenting results of research project : Navigating power inequalities between development NGOs in the aid system