Evaluation of ozone injury on foliage of black berry (Prunus serotina) and tall milkweed (Asclepias exaltata) in Great Smoky Mountains National Park

agentes nocivos air pollution altura arbre forestier asclepiadaceae crecimiento croissance damage eua evaluation facteur nuisible feuille foliage forest health forest pests forest trees growth hauteur height highlands hojas injurious factors insecte nuisible leaves ozone ozono pest insects pests of plants plagas de plantas plagas forestales plant growth plant health prunus serotina ravageur des plantes tennessee usa