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Highlight IDTitleStrategic Program Area(s)YearStation
Photo of 1: Two American elm trees tree on left healthy with dark green foliage while tree on right is diseased and exhibiting light yellow foliage.  
 
2: Variability in American elm leaf color associated with infection by Candidatus. Phytoplasma trifolii  with leaves on left collected from an infected tree while leaves on right were collected from a healthy tree.
ID: 1255
Identification of a clover proliferation group phytoplasma as the probable cause of American elm Ttee mortality

Forest Service scientists observed premature canopy decline symptoms in elm trees within their research plantations in midsummer 2016. They attr ...

Principal Investigator : Nancy Hayes-Plazolles

Invasive Species2017NRS