Before revision: Female poplars produce low-allergenic but highly visible fruiting cotton, wrongly associated with grass pollen, which appears at the same time of year and is highly allergenic but much less visibleBrochure technique "Peupleraie et Environnement", CRPF Nord Pas-de-Calais Picardie, 2012, p.
After revision: Female poplars produce low-allergenic but highly visible fruiting cotton, wrongly associated with grass pollen, which appears at the same time of year and is highly allergenic but much less visible.Brochure technique "Peupleraie et Environnement", CRPF Nord Pas-de-Calais Picardie, 2012, p.