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Progression of sugarberry ( Celtis laevigata ) dieback and mortality in the southeastern United States.

Formally Refereed
Authors: Emilee Poole, Michael Ulyshen, Scott Horn, Patrick Anderson, Chip Bates, Chris Barnes
Year: 2021
Type: Scientific Journal
Station: Southern Research Station
Source: Journal of Forestry


The southeastern United States has been experiencing unexplained sugarberry (Celtis laevigata) mortality for over a decade, representing one of the most severe and widespread Celtis mortality episodes ever reported from North America. Here we describe external symptoms, progression of mortality, and the known geographic extent of the problem. More than half of all trees monitored at one site within the affected area died over five years of observation. Although many trees died within a year of first exhibiting symptoms (e.g., small yellow leaves, branch dieback, premature leaf fall), many others continued living for years after becoming symptomatic. A preliminary insecticide trial found no improvements in survivorship among trees treated with insecticides, emamectin benzoate and imidacloprid, relative to control trees. Our findings suggest the problem will likely continue and become more widespread in the coming years.


forest health, tree mortality, native species


Poole, Emilee M; Ulyshen, Michael D; Horn, Scott; Anderson, Patrick; Bates, Chip; Barnes, Chris. 2021. Progression of Sugarberry ( Celtis laevigata ) Dieback and Mortality in the Southeastern United States . Journal of Forestry. 119(3): 266-274.