Gypsy Moth Infestation

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Ken Waller
Posts: 33
Joined: Tue Sep 15, 2015 9:20 pm

Gypsy Moth Infestation

Post by Ken Waller » Tue Jun 23, 2020 12:13 pm

Gypsy Moth Invasion
by Barbara Fradkin, SLPOA Environmental Issues Co-ordinator

There is a huge gypsy moth infestation this spring, which not only creates a mess and defoliates the trees, but also weakens them, potentially killing them, and reduces the habitat and food supply of other wildlife.
In the absence of large-scale aerial spraying, there are some steps that individual property owners can take to try to control the damage on their own property. Knowing the gypsy moth’s life cycle is important to knowing how to manage its spread. There are four main stages of the gypsy moth lifecycle: larva/caterpillar, pupa, adult moths, egg masses. Scroll down for specific stage-centric methods to capture and remove gypsy moths and limit the pest’s spread.
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To manage gypsy moth:

May to July: Hand Pick Caterpillars

June – August (Larger caterpillar stage): Burlap Banding
. Once the caterpillars grow to about an inch (2.5 cm) in length by mid-June, they will move down the trunk to seek shelter from predators and heat during the day. Reduce the number of larvae on the trees in your yard by trapping them.

Required Supplies
• Burlap cloth
• Twine or rope
• Bucket of soapy water. Dish soap works well

Step-by-Step Instructions: Wrap and secure a piece of burlap cloth around the stem/trunk of your tree. Tie twine or rope around the center or slightly below the centre of the burlap. Drape the burlap cloth over the twine or rope so there is an overhang where the caterpillars can crawl underneath to seek shelter during the day. Check the trap by lifting the overhanging burlap cloth every afternoon and collect any hiding caterpillars. Put them into a bucket of soapy water for a few days to destroy them. Doubling up duct tape to expose the sticky side is also helpful.
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(Photo credit: Pennsylvania Dept of Conservation and Natural Resources - Forestry -

July – August (Female Moth stage): Burlap Wrapping
 to Trap Female Moths: Wrap burlap lower on the trunk of the tree to trap the female moth (which are unable to fly) before it crawls up the tree and lays eggs. This is the same method used for the larger caterpillar stage. Once captured, drown the moths in soapy water.

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July – August (Male Moth stage): Hang Pheromone Traps. 
Hang pheromone traps in trees to attract male moths, which prevents them from mating with female moths and producing eggs. Once captured, drown the moths in soapy water.
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November – late April (Egg stage): Destroy Egg Masses. 
Survey your property for egg masses and scrape them off surfaces into soapy water to destroy them.

Required Supplies
• A flat object such as a butter knife or plastic paint scraper
• Catchment container or bag to collect the egg masses
• Bucket of soapy water. Dish soap works well

Step-by-Step Instructions: Place your catchment container below the egg mass. Use your scraper tool to remove the egg mass from the surface. Ensure that all eggs are scraped. Try not to leave any residual eggs in bark ridges or crevices. Empty the contents of your catchment container or bag into a bucket of soapy water. Leave the eggs sitting in the bucket for a day or two, then dispose of the contents. Egg masses can be located high up in trees. Take care, especially if using ladders. Some private tree care companies can be hired to provide this service at heights.

This information is from: ... -Moth.aspx

More info: ... erpillars/

Posts: 2
Joined: Wed Jun 24, 2020 10:49 am

Re: Gypsy Moth Infestation

Post by ZimmerAirServices » Fri Jun 26, 2020 11:10 am

Hello All,

Although the city approach is a good approach for control of small Gypsy Moth Infestation; the only true way to control a large infestation is by Aerial application.

I direct you to the Zimmer Air Website Who is highly experienced in Aerial application for the control of Gypsy Moth Infestation.

They use Foray 48B which is a safe Biological Insecticide. Go on the website today under Services/ Aerial Applications / Forest Pest Control.

Timing is critical. Get a head of the 2021 year.
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Posts: 2
Joined: Wed Jun 24, 2020 10:49 am

Re: Gypsy Moth Infestation

Post by ZimmerAirServices » Fri Jun 26, 2020 4:25 pm

You can also follow this link below to submit your information to us. ... FCTEk5Ry4u

Ken Waller
Posts: 33
Joined: Tue Sep 15, 2015 9:20 pm

Re: Gypsy Moth Infestation

Post by Ken Waller » Wed Sep 02, 2020 10:24 am

Gypsy Moth Caterpillars in Sharbot Lake

The spring and early summer of 2020 saw the Gypsy Moth caterpillars infiltrate many Sharbot Lake properties and significantly consume the foliage on their trees. These caterpillars are not native to America and are much more worrying than tent caterpillars. Gypsy moth caterpillars’ defoliation means that many of the trees will die. Two years of this defoliation and the leaves cannot return, especially the needles on the pine trees. If you have Oak, Pines, Birch etc., be prepared for some tree loss in the coming years.

Next year the infestation will likely be worse based on the number of egg pods/masses already deposited on the side of trees by the mature moths. Each tiny egg pod contains up to 1,000 caterpillars waiting to hatch next spring.

To the cottagers from the USA, since you have not been able to venture to Sharbot Lake this year, you have not seen how the caterpillars have defoliated the trees around the lake and on some of the islands. You may wish to contact a cottage neighbour to determine the impact on your property.

What can we do to minimise the damage next year?

1) We can remove the egg pods from the lower sides of the trees and scrape them into a bucket of soapy water, leaving them for 48 hours in the suds. This will kill the eggs but many egg pods are high up in the trees and not accessible for this procedure.
2) We can also contract with Zimmer Air Services to spray a Btk substance on the leaves, which will kill a very high percentage of these caterpillars next spring.

I have been in touch with Zimmer Air Services. They have been doing aerial spraying in Ontario for this caterpillar since 1998. What they spray is called Btk that only harms the Gypsy Moth caterpillars once they consume the leaves that contain the Btk. Btk is a bacteria known as Bacillus thuringiensis variety kurstaki. This bacteria is naturally occurring, and it affects only caterpillars, and only after they eat it. The spraying must be done twice in late April or very early May when the caterpillars hatch and start eating the leaves. Btk is not harmful to the environment (in fact it is already present in the soil), and will not affect other insects, animals and humans. This is an effective way to eliminate these caterpillars. Properties in North Frontenac have used this service already.

I have spoken to Ken Waller, president of the Sharbot Lake Property Owners Association and I have offered to be a central contact point/coordinator for owners that are interested in having a spray next spring. The more cottages that join, the better the spraying success. Now is the time for action. We need to sign up as soon as possible.

Information on the gypsy moth, Btk, spraying details and contract requirements is available on the Zimmer Air Services website. Go to ... t-control/

If you are interested in potentially joining this campaign for next spring please reach out to me and let me know. Your contact information should contain your name, phone number, email and cottage address. If you would like to discuss this program please contact me, before 30 Sep 20 at;

Rob Patten
1976 Shibley Road,

The complete cost for 2 sprays next spring including taxes and the Btk is $357 for up to an acre of property. This is not expensive since having just one dead tree, killed by these caterpillars, removed would most likely cost you more.

You may of course reach out to Pauline Zimmer ( to discuss directly with her.

Best regards,

Rob Patten
P.S. The Federation of Ontario Cottagers Associations (FOCA) presented a webinar on the gypsy moth caterpillar. You can watch the entire webinar by going to ... ly2020.mp4

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