Le Réseau National de Surveillance AérobiologiqueRNSAAlert report
 

Titre Pollens

Main allergenic pollens

All pollens are not allergic. To cause allergy symptoms, it is essential that the pollen grains arrive to the respiratory mucosa of human. Only plants anemophilous disseminate pollen grains by the wind, while entomophilous plants require the intervention of an insect to ensure fertilization by transferring pollen from the male to female flower receiver.
 
The pollens of high allergenicity are produced by anemophilous plants (trees and grasses).
To be allergenic, pollen grain must dispose of substances (proteins or glycoproteins) immunologically recognized as harmful to an individual.

Comparative table

Trees allergy potency Trees allergy potency
Cypress
5
Plane tree
3
Hazel
3
Mulberry
2
Alder
4
Beech
2
Poplar
2
Oak
3
Elm
1
Pine tree
0
Willow
3
Olive tree
3
Ash
4
Lime tree
2
Hornbeam
3
Chestnut
1
Birch
5
 

 

Herbaceous
allergy potency
Herbaceous
allergy potency
Sorrel
2
Nettle
1
Grasses
5
Chenopode
3
Plantain
3
Mugwort
3
Parietaria
4
Ragweed
5
Allergenic potential from 0 = none to 5 = very strong = très fort

 

Lexicon of pollen names

Here are the correspondences of the pollen names in Latin, German, English, Catalan, Spanish and French:

Titre Recognize allergenic trees

You can download  by clicking the link below a poster where you will recognize the trees emitting allergic pollens: leaves, flowers, fruit and bark are detailed and an indication of the risk associated to these allergic pollens trees.
 

Download the guide

Titre Guide de la végétation en ville

Here is a guide to inform about allergy to pollens but also on the main actions to lead to  fight against this allergy.

Download the guide