Toronto dealing with 'unprecedented' number of gypsy moth caterpillars this year
Toronto is currently dealing with an "unprecedented" number of gypsy moths this year, a caterpillar-turned-moth that poses a serious risk to trees across the city.
“We're certainly well aware of the fact it's a bad year for these gypsy moth larvae, etc. and that we are doing our best to deal with it,” Mayor John Tory said.
Residents have been reporting numerous sightings of dark and hairy gypsy moth caterpillars, which possess distinctive red dots on their backs.
Gypsy moths are known to emerge across the Greater Toronto Area in the spring, but this year large amounts of the insects appear to be popping up in more areas in the city.
“What we're seeing is gypsy moth is moving and we're seeing populations of gypsy moths roll larger in parts of the city that have never experienced it before,” Toronto Forest Healthcare Inspector Joel Harrison-Off told CP24.
A gypsy moth caterpillar eats a leaf on a tree Tuesday, June 12, 2007, in Trenton, N.J. (AP / Mel Evans)
A representative for pest control company Orkin Canada said the province is seeing an "unprecedented" influx of gypsy moths this year.
“I'm not gonna lie, this is the biggest year that we've seen into our call center where we've had thousands upon thousands of local residents that have been calling us across the province. Its been an uptick that has been unprecedented,” Bernie Grafe told CP24.
Despite being unwelcome critters by many, the caterpillars feed on tree leaves before forming a cocoon and transitioning into a moth, causing severe defoliation to trees.
The loss of leaves can stress the trees and make them more vulnerable to harm from other insects, diseases and weather fluctuations, according to the city.
Harrison-Off said the insects’ impact on trees is an ongoing issue the city has been battling.
“The defoliation on trees that hasn't been seen in these parts of the city before, it's raising a lot of concern and it's also drawing us into these areas more trying to come up with plans in terms of how to deal with it into the future,” he said.
Most healthy trees can withstand one to several years of severe defoliation by gypsy moths but some tree species are more vulnerable to the insects.
“For us, the concern is where we have oak dominant stands in the city, these are the types of trees that actually can die and go intp to decline from heavy feeding of gypsy moth. A lot of other trees, maples, norway maple, birch, bass woods, they can recover.
In previous years, the city has used aerial spraying of a pesticide to target large areas with a high prevalence of gypsy moths. However, the city opted not to use the spray in 2021.
“I think people don't understand that you don't just kind of use that sort of spray all the time. This is a year in which there wasn't a planned spray but there are measures being taken to do things to the trees and to treat the trees,” Tory said.
The city determines the need for an aerial spray after extensive egg mass surveying.
Due to small areas of gypsy moth populations, city staff decided to schedule a variety of ground-based treatments on roughly 5,000 city-owned trees this year.
Using an aerial spray now would be ineffective as caterpillars likely won’t be affected by the pesticides, Harrison-Off said.
For residents coping with their own gypsy moth infestation, the city says they can try to trap the caterpillars with a burlap cloth on their trees.
To prevent future gypsy moth outbreaks, Grafe recommends that residents search for any signs of eggs on their trees in May or early spring.
“Beginning of spring, you're going to inspect those trees, look for the little gray eggs, remove those, and put those in soapy water [to destroy them]” he said.
CTVNews.ca Top Stories
BREAKING Israel attacks Iran, Reuters sources say; drones reported over Isfahan
Israel has attacked Iran, three people familiar with the matter told Reuters, as Iranian state media reported early on Friday that its forces had destroyed drones, days after Iran launched a retaliatory drone strike on Israel.
American millionaire Jonathan Lehrer denied bail after being charged with killing Canadian couple
American millionaire Jonathan Lehrer, one of two men charged in the killings of a Canadian couple in Dominica, has been denied bail.
Nearly half of China's major cities are sinking, researchers say
Nearly half of China's major cities are suffering 'moderate to severe' levels of subsidence, putting millions at risk of flooding especially as sea levels rise.
Prince Harry formally confirms he is now a U.S. resident
Prince Harry, the son of King Charles III and fifth in line to the British throne, has formally confirmed he is now a U.S. resident.
Judge says 'no evidence fully supports' murder case against Umar Zameer as jury starts deliberations
The judge presiding over the trial of a man accused of fatally running over a Toronto police officer is telling jurors the possible verdicts they may reach based on the evidence in the case.
Health Canada to change sperm donor screening rules for men who have sex with men
Health Canada will change its longstanding policy restricting gay and bisexual men from donating to sperm banks in Canada, CTV News has learned. The federal health agency has adopted a revised directive removing the ban on gay, bisexual and other men who have sex with men, effective May 8.
Colin Jost names one celebrity who is great at hosting 'Saturday Night Live'
Colin Jost, who co-anchors Saturday Night Live's 'Weekend Update,' revealed who he thinks is one of the best hosts on the show.
Sports columnist apologizes for 'oafish' comments directed at Caitlin Clark. The controversy isn't over
A male columnist has apologized for a cringeworthy moment during former University of Iowa superstar and college basketball's highest scorer Caitlin Clark's first news conference as an Indiana Fever player.
'Shopaholic' author Sophie Kinsella reveals brain cancer diagnosis
Sophie Kinsella, the best-selling author behind the 'Shopaholic' book series, has revealed that she is receiving treatment for brain cancer.