Due to an overwhelming response for aerial spraying in the region last year, Zimmer Air Service has outsourced a company to handle the administration and planning of the 2022 Gypsy/LDD Moth Aerial Spray program this year.  That company is the Ontario Centre for Forest Defoliation Control (OCFDC).  Note that the term ‘Gypsy Moth’ is also referred to as the Lymantria dispar dispar (LDD) Moth.

If you signed-up last year (see History item below), you may have received an email from OCFDC asking you to apply again this year.  OCFDC has advised that it is much easier and more efficient to sign-up directly with them.  OCFDC has posted the 2022 on-line sign-up sheet on their website Home page.  The deadline to sign-up is March 1, 2022.   OCFDC has kindly provided us with a 2022 Pricing Guide (similar to last year).  Unfortunately, OCFDC advises that ‘Due to the rising costs, we are unable to provide discounts for the upcoming season. The pricing is set at the lowest possible price without implementing a discounting structure’.

 OCFDC informed us that:  ‘For the most part, this program is very similar to what you have experienced in the past. Any new applications received, will be mapped at the end of January, early February at which time our team will contact them with a pdf for visual confirmation. Once confirmed, we will send the final customer package including the service agreement, waivers, and payment information. We require both payment and a signed agreement before the file is considered complete and sent to the GIS team to be added to the master map’.

If you are interested in spraying your property(s) this year, please sign-up directly with OCFDC.  Please state ‘Christie Lake Association Inc.’ under Question 8. Group or Cottage Association to facilitate easy property grouping.  If you wish to keep a copy of your completed on-line sign-up form, print your page (or print to pdf) before you submit your completed application.  You will need to provide your tax roll number which can be found on your property tax bill. 

The Ministry of Northern Development, Mines, Natural Resources and Forestry (NDMNRF) has informed us that the 2022 LDD/Gypsy Moth defoliation forecast map will be posted on their LDD web page in the next few weeks.  It will be also be posted on this page when available.

For more information about the 2022 aerial spray program, please contact OCFDC at:

Ontario Centre for Forest Defoliator Control 

P.O. Box 98, Chatham, Ontario  N7M 5K1

Office: (226) 996-9702    Toll-free: 1-888-276-9372

Website: https://www.ocfdc.com/     Email: info@ocfdc.com


History – 2021 Gypsy Moth Aerial Spray Program: 

Last year, the CLA board undertook a major new initiative, assisting members to contract Zimmer Air Service for aerial spraying of gypsy moth caterpillars.  Following a couple of years of tent caterpillars, the trees in Lanark County were heavily hit by a gypsy moth infestation in 2019 and 2020.  Many members began experiencing the loss of treasured old trees, particularly oaks.  However, the caterpillars have also adapted to our forests and are now noshing on maples, poplars  and even pine trees.

The extent of concern around the lake was evident by the rapid and enthusiastic subscriptions to the service.  We logged over 100 properties, out of approximately 250 around the lake, requesting spraying services. A few weeks afterwards, we were able to do a satisfaction survey, to which 77 residents responded, including 24 (31%) who did not have their properties sprayed.

Fully 75% of respondents indicated interest in having a further spraying done in 2022. Just over 70% reported a decrease from 2020 in caterpillar activity, in spite of an overall increase in defoliation reported in the county. Of the 77 respondents, only 19 were not interested in spraying this coming year.

The board is pleased that we were able to offer a group effort to keep our trees healthy and are grateful to all who participated or supported their neighbours with waivers. We would encourage everyone to sign-up this year, as not all properties were sprayed and the defoliation was clear on our islands and along the rail line shore.

For your information, here are last year’s defoliation maps – the 2021 Forecast and 2021 Actual.


Krystyna Williamson


Christie Lake Association Inc.