Gypsy Moth

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Gypsy Moth Update

Gypsy Moth Populations Continue to Decline in Mount Prospect

Gypsy Moth is an insect whose caterpillars feed on a very wide variety of tree leaves, especially oaks. Gypsy moths became a concern in Mount Prospect around 2009. The Village’s Forestry/Grounds Division began monitoring for the insect, and treating some infestations, around that time.

During 2013, Village arborists continued to monitor Gypsy Moth levels throughout Mount Prospect to project control measures needed in 2014. The number of trees that needed treatment in 2013 was even lower than 2012, which had seen a significant decline from years past. The Village performed egg mass removals in early 2013, and found the lowest egg mass totals since 2009. Additionally, adult male moth trapping was done during the summer flight season in 2013; this also showed a decrease in the number of moths trapped.

As a result of the declining insect population, the Village has suspended its Gypsy Moth egg mass removal program for 2014. Staff arborists, however, will still be on the lookout for signs of the pest throughout the year. Residents can assist by inspecting their own properties for the presence of Gypsy Moth egg masses. Egg masses can range in size but are generally 1”-2” long by 1” wide, tan in color and comprised of hairs from the female moth. They can be found not only on trees but on any stationary outdoor object or surface. Any egg masses that are found should be destroyed by removing and soaking them in soapy water for a minimum of two days.

Gypsy Moth egg masses at 604 S Main 007
Gypsy Moth egg masses and pupae

The Village can send a free homeowner’s guide to residents concerned about gypsy moth. The guide covers some methods homeowners can use to control the pest on individual trees. It also covers insecticide treatments for high populations. Note that if using an insecticide for control, a professional licensed arborist should be consulted. The Gypsy Moth guide can be obtained by contacting the Public Works Department at 847-870-5640.

G Moth adults -3-J
Adult moths (female moth on top)

Movement of Firewood Spreads Invasive Pests
Residents can help prevent the spread and introduction of pests by not moving tree debris or firewood from where it originated. For residents who use firewood, the Village encourages you to burn all of the wood before April. For future firewood purchases, ask for the source. Ideally, use firewood from locally grown trees. If the wood may have crossed state lines, look for the USDA shield on the packaging to insure that it has been properly inspected.


APHIS Shield – should be present when purchasing firewood 

April 2014