Forest tent caterpillars gobbling leaves in east Winnipeg

Winnipeg is starting to see an infestation of forest tent caterpillars, the fuzzy black crittersthat devour leaves on trees until the branches are bare.

A new cycle of the insectsstarted in the city last summer, and nowthe larvae are eating leaves from trees mainlyin Transcona and Sage Creek, according to the City of Winnipeg.

CharleneLemoinehas already noticed them in her Island Lakes neighbourhood.

"Some of my friendsthey have lots of them in their yard. I know some of them are like crawling up the house and all over their trees and stuff," she said.

"We started noticing some forest tent caterpillars kind of scattered here and there through the city in really small quantities last year, and this year we're starting to see the numbers increase," city forester Martha Barwinsky told CBC News.

Forest tent caterpillar infestations happen in Winnipeg about every 12 to 15 years, said Barwinsky, adding that the last outbreaktook place in 2000.

"What we'll see this year with the trees,we're seeing it right now, where there will be some trees in certain areas that will be completely defoliated," she said.

Barwinsky said it's difficult to know how severe the latest infestation will be.

She is recommending that homeowners spray infected trees with the biological insecticide Bacillus thuringiensis subspecies kurstaki (BTK).

"They are big eaters. They will defoliate a tree in large numbers," said Barwinsky.

A tent caterpillar infestation has also hitthe northern Ontario town of Red Lake, with trees there stripped bare and vehicles coveredwith the insects and their feces.

Some areas of Manitoba have also seeninfestations this year.

"We are getting reports from my colleagues in the province that north-western and western Manitoba are hit quite hard right now, so we are expecting numbers [here] to build up in the next year or two," saidBarwinsky.