Lymantria Moth News

July 19, 2021: Gypsy Moth Common Name Update

The Ministry will no longer be using the former common name (gypsy moth) for Lymantri dispar and will be referring to this moth as Lymantria moth until the Entomological Society of America announces a new common name. The Ministry is working to update the Lymantria moth website and remove all references to the term gypsy moth.

June 1, 2021: Courtenay Aerial Spraying Complete

The gypsy moth eradication program north of Courtenay. B.C. was completed this morning between 5:15 am and 7:15 am.  Treatments were completed on May 11th, May 21st and June 1st. No further treatments are planned for this area.  Trapping results will be reviewed and announced in the fall to confirm if the aerial spray program was effective.

May 27, 2021: Courtenay Aerial Spray Update

The third and final aerial spray treatment of 187 ha north of Courtenay, B.C. is scheduled for Tuesday, June 1st.  Please note that spray dates are weather dependent and can change under short notice.  

Treatments are conducted with a small, low-flying plane and will take place between 5:00 am and 8:00 am.  Foray 48B, a biological insecticide containing Btk as the active ingredient, is the product being applied to the affected area: Map of planned treatment area.

Despite the lack of toxicity, people who are immuno-compromised, have respiratory issues or any other health concerns are recommended to take precautions to avoid direct contact with the spray by staying indoors with doors and windows closed during the spray and for at least a half hour after the spray aircraft has passed overhead.  A strong odour may persist in the treated area for a few hours afterwards but will dissipate.  Residues left on hard surfaces are harmless and can be washed off with water, soap and a bit of scrubbing.  Pre-soaking the droplets with a wet towel makes them easier to remove. The spray does not damage car finishes.  We also recommend bringing your pets indoors for the duration of the spray.

May 21, 2021: Courtenay Aerial Spray #2 Complete

The second aerial spray treatment of 187 ha north of Courtenay, B.C. was completed on May 21st between 5:30 am and 7:30 am. The third spray will be announced later next week.

May 17, 2021: Courtenay Aerial Spray Update

The second aerial spray treatment of 187 ha north of Courtenay, B.C. is scheduled for Friday, May 21st.  Please note that spray dates are weather dependent and can change under short notice.  

Treatments will be conducted with a small, low-flying plane and will take place between 5:00 am and 8:00 am.  The area will be treated up to two more times and treatments will occur approximately seven to 10 days apart.  Foray 48B, a biological insecticide containing Btk as the active ingredient, is the product being applied to the affected area: Map of planned treatment area.

Despite the lack of toxicity, people who are immuno-compromised, have respiratory issues or any other health concerns are recommended to take precautions to avoid direct contact with the spray by staying indoors with doors and windows closed for at least a half hour after the spray aircraft has passed overhead.  A strong odour will persist in the treated area for a few hours afterwards but will dissipate.  Residues left on hard surfaces are harmless and can be washed off with water, soap and a bit of scrubbing.  Pre-soaking the droplets with a wet towel makes them easier to remove. The spray does not damage car finishes.  We also recommend bringing your pets indoors for the duration of the spray.

May 11, 2021: Courtenay Aerial Spray #1 Complete

The first aerial spray treatment of 187 ha north of Courtenay, B.C. was completed on May 11th between 5:30 am and 7:30 am. The second spray will be announced early next week.

May 9, 2021: Courtenay Aerial Spray Update

Due to forecasted rain on May 12th, the first aerial spray treatment of 187 ha north of Courtenay, B.C. is now scheduled for Tuesday, May 11th. Please note that spray dates are weather dependent and can change under short notice.  Treatments will be conducted with a small, low-flying plane and will take place in the early morning hours, usually beginning at first light (about 5:00 am) and ending by 8:30 am.  The area will be treated up to four times and treatments will occur seven to 10 days apart.  Foray 48B, a biological insecticide containing Btk as the active ingredient, is the product being applied to the affected area: Map of planned treatment area.

Despite the lack of toxicity, people who are immuno-compromised, have respiratory issues or any other health concerns are recommended to take precautions to avoid direct contact with the spray by staying indoors with doors and windows closed for at least a half hour after the spray aircraft has passed overhead.  A strong odour will persist in the treated area for a few hours afterwards but will dissipate.  Residues left on hard surfaces are harmless and can be washed off with water, soap and a bit of scrubbing.  Pre-soaking the droplets with a wet towel makes them easier to remove. The spray does not damage car finishes.  We also recommend bringing your pets indoors for the duration of the spray.

May 7, 2021: Courtenay Aerial Spray Update

The first aerial spray treatment of 187 ha north of Courtenay, B.C. is scheduled for Wednesday, May 12th.  Please note that spray dates are weather dependent and can change under short notice.  Treatments will be conducted with a small, low-flying plane and will take place in the early morning hours, usually beginning at first light (about 5:00 am) and ending by 8:30 am.  The area will be treated up to four times and treatments will occur seven to 10 days apart.  Foray 48B, a biological insecticide containing Btk as the active ingredient, is the product being applied to the affected area: Map of planned treatment area.

April 6, 2021: Order in Council No. 215 Issued

The North American Gypsy Moth Eradication Regulation, 2020, B.C. Reg. 81/2020, is repealed, and the North American Gypsy Moth Eradication Regulation has been made.  View the Order in Council:

2021 Treatment Plan and Pesticide Use Permit Issuance

A Pesticide Use Permit (Pesticide Use Permit No. 738-0032-21/24) has been issued by the Integrated Pest Management Branch for the aerial treatment of 187 ha, north of Courtenay, B.C.  Treatments will commence in late April or early May of 2021.  This decision may be appealed to the Environmental Appeal Board in accordance with Section 14 of the Integrated Pest Management Act.  An appeal must be delivered within 30 days of March 1, 2021 (the date that notice of the decision was given).  For further information regarding the permit and appeals, please contact the Environmental Appeal Board at (250) 387-3646.

Questions or comments regarding the planned eradication program can be submitted electronically to ForestPracticesBranchOffice@gov.bc.ca or by leaving a voicemail on the 24-hour Gypsy Moth Information Line at 1-866-917-5999.

2020 Trapping Results

Pheromone trapping to detect male gypsy moths in B.C. was completed for 2020 and the results are posted with maps on our detection history page. Fifty-one male moths were caught in many locations across Southern British Columbia.

Gypsy Moth Listserv Replacement

The application used to support the Gypsy Moth Listserv is being retired.  Current subscribers are asked to re-subscribe to the new application that automatically sends notification of any updates to this page.  Follow the instructions in the right-hand box to stay up-to-date on the latest information about this program.

Green Waste Information for Surrey & Delta Residents

Help Keep B.C. Gypsy Moth Free! Gypsy Moth has been located and is under eradication in Surrey and Delta. You can help prevent Gypsy Moth from establishing permanently in B.C. by inspecting your outdoor plant waste for egg masses and ensuring all green waste goes in your green bin.

If you are a resident of Surrey and have large green waste items that do not fit inside your green waste bin, call the City of Surrey Waste Collection Hotline at 604-590-7289. If you are a resident of Delta, ensure that all green waste is contained in green cans or kraft paper bags. Delta residents can drop off large quantities of green waste, free of charge, at Enviro-Smart Organics (4295 72 Street).