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RSS FeedsToronto suffers inchworm infestation for the first time in 17 years
(The Star Television)

 
 

24 june 2017 15:56:00

 
Toronto suffers inchworm infestation for the first time in 17 years
(The Star Television)
 


Craig Weaver was walking his dog through High Park earlier this month, when he heard the caterpillars feasting.“They were everywhere,” he said.“All you could hear was crunching.”Weaver thought gypsy moths were the culprit; the pests have been chewing through Toronto tree leaves for more than 20 years.But a surprise intruder has caught the city off guard this year: inchworms.“We weren’t expecting this at all,” said Ray Vendrig, manager with Toronto’s urban forestry department. You may have seen inchworms, properly called cankerworms, dangling from silk threads around the city this year. They’re a relatively rare visitor; this is the first cankerworm infestation since 2000.The city’s website says cankerworms have caused “significant defoliation” in High Park, Glen Stewart ravine, Glen Davies ravine, Baby Point, Etobicoke Creek Ravine and parts of the Don Valley Ravine.The hungry caterpillars also hit Mississauga, Hamilton and Burlington, said Jessica McEachren, Missisauga’s manager of forestry.“You can’t necessarily plan for these guys,” said McEachren. She said Mississauga sprayed a bacterial insecticide in some areas to prepare for cankerworms, but they were not expecting so many.With a roughly 10-year cycle, a cankerworm invasion is a hard thing to anticipate, Vendrig said, particularly because the eggs are tiny and hidden in tree tops.After they hatch, larvae spend about two weeks munching through leaves before dropping to the ground.The feeding frenzy is pretty much over by now, however, and the caterpillars are either hanging off trees or have burrowed underground forming a cocoon, said Vendrig.While some trees may look ravished, they will likely sprout new leaves soon, he said.“Generally, with cankerworm, trees will rebound,” he said.Toronto was planning for a gypsy moth infestation this year, and sprayed the Btk insecticide over cer ...


 
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