Abstract
IgE-mediated allergy to pollen affects a quarter of the population. It is responsible for rhinitis, conjunctivitis, asthma and exacerbation of atopic dermatitis, and it may be complicated by food allergies to fruits and vegetables. The current rise in pollen allergy is related to changes in the outdoor environment (air pollution, climate warming) and microbial exposure (hygiene hypothesis). Phenological monitoring set up in the Jean-Marie Pelt botanical garden (Villers-lès-Nancy, France) in 2014 consists of monitoring 24 plants emitting pollen allergens. The main objective is to inform allergic persons and health professionals in real time of the pollination of allergenic species. Hazel pollination began in late December during the mild winters of 2014 and 2015. The start of pollination of this species can vary by up to 10 weeks depending on exposure. Meadow foxtail appears to be an indicator of the beginning of the grass pollination season, with timothy closing the season. The rise of flowering herbaceous plants in autumn is linked to the practice of late mowing. Phenological monitoring yields information in real time and allows investigation of the influence of climate and human activities on the pollination of species that entail risk. Through digital transmission of this information, preventive action against the relevant allergic symptoms can be initiated immediately.
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