This scientific aerobiology component was set up by Herbanatur, Inc. consists of taking daily samples from pollen sensors and measuring the pollen level produced by Ambrosia on different sites treated with our ecological herbicide compared to neighboring untreated sites. This exercise is repeated simultaneously on a dozen different regional sites during the months of July, August, September and October. A scientific reference report is published each season.

To determine the concentration of ragweed pollen in the air, expressed as the number of grains per cubic meter of air (grains/m³), an independent laboratory (Aerobiology Research Laboratories) analyzes the stems to determine the number of pollen grains in the samples that have been taken. For the sake of transparency, all the sampling stations were installed in the backyards of randomly selected citizens. These citizens are responsible for collecting all samples daily. The number of pollen grains is determined by microscopic examination of the polystyrene rods. The study of the stem is done using a 20x magnification, and 15 microscopic fields have been analyzed. Ambrosia pollens were distinguished from other particles and counted.

References:  The city of Montreal’s air quality monitoring network (RQSA2003), based on studies by Comtois (1995), established risk levels of allergic rhinitis for the population based on the pollen concentration according to the following grid.