Characteristic white ovisacs of hemlock woolly adelgid.
Image by Michael Montgomery, USDA Forest Service

Hemlock Wooly Adelgid

Invasive Species

Emerald Ash Borer,  Agrilus planipennis  Pennsylvania Department of Conservation and Natural Resources - Forestry Archive, Hemlock Adelgid

Emerald Emerald Ash Borer and Hemlock Woolly Adelgid are here!

Emerald ash borer and Hemlock Woolly Adelgid are infesting and killing trees in Broome County. As the populations of these invasive insects grow, more and more trees will become infested and die.  

Emerald Ash Borer (EAB)

EAB is an invasive wood boring beetle from to Asia that infests and kills all native species of ash trees in the United States.  EAB was first detected in Broome County in 2014, and it has now spread across the southern portion of Broome County.  Dead, infested ash trees have been found in the towns of Conklin, Kirkwood, Maine, Vestal, and Union, and in the City of Binghamton.  EAB will eventually kill nearly all unprotected ash trees in the County.  The links below provide information on identifying ash trees and EAB infestations, as well as options for protecting trees with insecticides.  

NYS DEC Emerald Ash Borer

The Cooperative Emerald Ash Borer Program

Ash Tree Identification Michigan State Extension

Signs & Symptoms of EAB (Michigan State Extension)

Emerald Ash Borer Management

Hemlock Woolly Adelgid (HWA)

HWA is a tiny, aphid-like insect that damages and kills our native eastern hemlock trees by sucking out moisture and nutrients while it feeds.  HWA was detected in Broome County in 2010.  It has been found in numerous locations in Broome County from the Pennsylvania State line to the Town of Triangle.  Protective insecticides are available for treating hemlock trees, and researchers are working on promising biological controls.  The links below provide detailed information on  HWA, including options for treating trees with insecticides.

NYS DEC Hemlock Woolly Adelgid

NYS Hemlock Initiative

Japanese Knotweed plantBush Honeysuckle fruit

Non-native Invasive Plants

Many species of non-native invasive plants have become established in Broome County.  Identifying and controlling these plants can be very challenging.   Contact us for help with identification and for management guidance.  Below are some helpful links.

Finger Lakes PRISM

Cornell Invasive Plants & Pests

NYS DEC Nuisance & Invasive Species


Linda Svoboda
Horticulture Program Educator
(607) 584-5016

Last updated October 14, 2021