Posts Tagged ‘hemlock woolly adelgid’

Help Fight the Spread of Hemlock Woolly Adelgid

Posted on: June 15th, 2018 by Brent Gotsch
White Woolly egg ovisacs are an indicator for hemlock woodly adelgid infestation

White wool­ly egg ovisacs are an indi­ca­tor of hem­lock wool­ly adel­gid infestation


Hem­lock Wool­ly Adel­gid (HWA) is a non-native inva­sive insect that has killed mil­lions of hem­lock trees across the east­ern Unit­ed States. In recent years it has been dev­as­tat­ing in the Catskill Moun­tain region and threat­ens not only hem­lock trees, but plants and ani­mals that rely on hem­locks for habitat.

Hem­locks are an impor­tant tree bor­der­ing moun­tain streams. Their branch­es and the spread and dis­tri­b­u­tion of nee­dles keep most of the sun­light from reach­ing the ground, cre­at­ing shade and dras­ti­cal­ly reduc­ing stream tem­per­a­tures. Trout and oth­er native species of fish rely on cold moun­tain streams to survive.

Researchers from Cor­nell Uni­ver­si­ty’s Depart­ment of Nat­ur­al Resources are using bio­log­i­cal con­trols such as preda­tor insects to help stop the spread of HWA. Groups such as Catskill Moun­tain­keep­er and the Catskill Region­al Inva­sive Species Part­ner­ship (CRISP) are pro­vid­ing edu­ca­tion and out­reach to let peo­ple know about the dan­gers HWA pos­es to forests and streams.

Be sure to watch this video from Catskill Moun­tain­keep­er and learn more about what you can do to help stop the spread of this seri­ous for­est pest.