METHODS: Pollen counts was generated at a suburban location (40.700, -74.322; Springfield, NJ) from July 8 - August 28, 2017 (41 days), and pollen counts were performed almost daily, using a Rotorod™ sampler placed at two different heights (68.5” = A and 210.5” = B), and assessed for Plantago major (Pm) species (“English Plantain”). No Pm pollen noted before the start date.
RESULTS: Average Pm pollen counts over 41 days for Height A and Height B were respectively 26.2 and 66.78 g/m3; cumulative Pm count were 1048 and 2471 g/m3. Release of Pm wasn't continuous, with 5 peaks of release seen at both heights, with 3 that were statistically different on days 7, 28, and 40 (p= 0.548, 0.469 and 0.344). There was a minor release at A without it being noted in B (9 g/m3)
CONCLUSIONS: Average and cumulative counts were greater for height B, but release of pollen occurred 2 days earlier at height A. Statistically significant peaks occurred throughout plantain season at 3 points. This shows that the start date for pollen can be noted earlier at levels for an average person exposed than what is detected at the currently recommended counting height.