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2009 Gypsy Moth Supression Program in Cooperation with MDA

The Maryland Department of Agriculture sprayed approximately 320 acres within the county on May 13, 2009. Areas to be sprayed are determined by field surveys conducted in the fall to identify areas that the gypsy moth population is high enough to damage the trees The Maryland Department of Agriculture (MDA) website posted a map of the spray block areas in Montgomery County here.

If you have questions about the spraying check out the MDA website or call 410-841-5922 for more information.

Gypsy moth life cycle, illustrated

The Life Cycle of the Gypsy Moth
In the fall and winter keep a look out for gypsy moth egg masses in crevices of tree trunks, fencing, woodpiles, etc. Remove egg masses by scraping them into a zip-top plastic bag with some water and detergent to kill the eggs, then put the bag in the trash. Take care when contacting egg masses as the hairs on the mass can cause topical allergic reactions.

What the Homeowner Can Do about gypsy moths
http://www.mda.state.md.us/pdf/gypsy_moth_egg_masses.pdf (4.6MB PDF)
http://www.mda.state.md.us/plants-pests/forest_pest_mgmt/gypsy_moth/what_to_do.php

Information about insecticide (B.t.)
All areas sprayed in Montgomery County were treated with B.t.

Disclaimer: Some of the publications posted on the Department of Environmental Protection’s (DEP) web site may be outdated. The Department is currently redesigning the site to bring you updated content and materials. We appreciate your patience and understanding during our web site construction period. If you need information before we are finished, please contact DEP at 240-777-7700.

Last edited: 6/26/2009