Cornell Cooperative Extension

Monroe County

Factsheets and Resources

Hemlock woolly adelgid (Adelges tsugae) -adult

Hemlock Pest

The Hemlock Woolly Adelgid lives and feeds on hemlock trees. Infested trees can die within 2 years, although 10-12 years is more common.

Read more
Garlic Mustard

Garlic Mustard

Garlic mustard is one of very few non-native plants to be able to successfully invade forest understories.

Read more
Four Spotted Lanternfly found on a Tree of Heaven (Ailanthus altissima) in Greece, NY

Spotted Lanternfly

Spotted lanternfly found in Monroe County

Read more
Brown Marmorated Stink Bug on leaf

Brown Marmorated Stink Bug

The Brown Marmorated Stink Bug is native to Asia, and was first detected in Pennsylvania in 2001. It produces an unpleasant smell indoors, and can damage shade and fruit trees, vegetables and legumes.

Read more

Contact

Challis Mathes
Horticulture Resource Educator/Team Lead
cjm438@cornell.edu
585-753-2557

Last updated April 3, 2025

Factsheets and Resources