Hemlock Woolly Adelgid Adelges tsugae Annand, 1924Non-native  -  Invasive    
Kingdom Animalia   >   Phylum Arthropoda   >   Class Insecta   >   Order Hemiptera   >   Family Adelgidae   >   Genus Adelges   


Major threat to Eastern Hemlocks. Flies in the genus Leucopis have been introduced in the East in hopes of controlling this species.

There are 51 records in the project database.

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Hemlock Woolly Adelgid in New Germany SP, Maryland (6/23/2013). Photo by Matt Tillett. (MBP list)

Hemlock Woolly Adelgid in Howard Co., Maryland (3/17/2015). Photo by Richard Orr. (MBP list)

An Eastern Hemlock with a Wooly Adelgid infestation in Garrett Co., Maryland (7/8/2012). Photo by Bill Hubick. (MBP list)

A Hemlock Woolly Adelgid in Harford Co., Maryland (6/28/2014). Photo by Dave Webb. (MBP list)

Hemlock Woolly Adelgid in Montgomery Co., Maryland (4/2/2022). (c) Katja Schulz, some rights reserved (CC BY). Photo by Katja Schulz via iNaturalist. (MBP list)

Hemlock Woolly Adelgid in Carroll Co., Maryland (2/16/2021). (c) Emilio Concari, some rights reserved (CC BY-NC). Photo by Emilio Concari. (MBP list)

Hemlock Woolly Adelgid in Garrett Co., Maryland (11/23/2021). (c) Kyle Klotz, all rights reserved. Photo by Kyle Klotz. (MBP list)

Hemlock Woolly Adelgid in Baltimore City, Maryland (7/31/2015). Photo by Kerry Wixted. (MBP list)

Hemlock Woolly Adelgids attacking an Eastern Hemlock in Harford Co., Maryland (4/29/2018). Photo by Josh Emm. (MBP list)

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MBP marks as "Invasive" any taxon listed in the Maryland Invasive Species Council (MISC) list of Invasive Species of Concern in Maryland. You can read their criteria and review the lists here: https://mdinvasives.org/species-of-concern/.

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