Canada Tales of devastation follow emerald ash borer, invasive species now found in Winnipeg

15:01  11 june  2018
15:01  11 june  2018 Source:   cbc.ca

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Manitoba Sustainable Development advises the emerald ash borer ( EAB ) has been found in Winnipeg . The EAB attacks and kills all species of ash trees, and is most commonly spread through the movement of firewood.

The emerald ash borer has devastated some Ontario ash tree populations. It has now been found in Winnipeg , the city says. (David Cappaert, Michigan State University).

a house with trees in the background: The Government of Canada estimates it will cost municipalities $2 billion over the next 30 years to treat, remove and replace ash trees infested with the emerald ash borer.© The Associated Press The Government of Canada estimates it will cost municipalities $2 billion over the next 30 years to treat, remove and replace ash trees infested with the emerald ash borer.

If Winnipeg's fight with the emerald ash borer resembles the experiences of Ottawa and Toronto, the insect will cause the demise of thousands of trees over the next few years and dramatically change how some neighbourhoods look.

The beetle moved into Toronto a little more than a decade ago and has killed large swaths of trees there, as it has in Ottawa, Montreal and other cities in between. No one was surprised when the insect was found in Winnipeg earlier this year.

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Two wood-boring insects, the sirex woodwasp and the emerald ash borer , have been spotted in or near New York State. Unwelcome visitors, both species are capable of quickly destroying an entire patch of forest As such

g g g g g g g Combating Non-native, Invasive Species . 2010. Cost of potential emerald ash borer damage in U.S. communities, 2009–2019. The emerald ash borer (Agrilus planipennis) is one of the most devas - tating invaders to have ever reached the United States.

Patti Moloney, who lives in Uxbridge, Ont. — just northeast of Toronto — said she took the ash canopy in her neighbourhood for granted until nearly all of the trees were cut down last fall after becoming infested.

"We were walking home with the kids from their school and I looked around and was, like, something is totally different. It just feels so barren," she said.

"Suddenly everyone's front yards and backyards and the school grounds and the boulevards along the street are a lot more bare. It's a stark difference."

Moloney, a jewelry maker with a company called Dimples, was so moved by the change she began a line of tree bark-inspired jewelry, and donates some proceeds to Forests Ontario.

a bicycle parked on the side of the street: City crews cut off nine ash trees halfway down the trunk on Wellington Street in Toronto after discovering they were infected by emerald ash borer in August 2014.© CBC City crews cut off nine ash trees halfway down the trunk on Wellington Street in Toronto after discovering they were infected by emerald ash borer in August 2014.

Winnipeg announced details of its $1.3-million ash borer control program last week. The city's urban forestry branch will select ash trees on city property this summer and inject them with insecticide treatments.

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It has now been found in Winnipeg , the city says. (David Cappaert, Michigan State University). The invasive emerald ash borer beetle has devastated urban tree canopies and strained municipal budgets wherever it has touched down.

The emerald ash borer ( EAB ) is an invasive wood-boring beetle, native to parts of Asia. A total of 20 species of ash are found in North America, six of which are native to Canada: green ash (F. pennsylvanica), white ash (F. americana), black ash (F. nigra), and much less common blue ash (F

Experts say insecticide is more of delay tactic than a cure — it buys cities time to hopefully plant replacement trees so crews can stagger the removal of ash trees.

'Tremendous' impact on neighbourhoods

While in its larvae stage, the emerald ash borer munches on an ash tree's conductive tissue, or cambium, effectively cutting off circulation. The bugs can kill a tree within a few years.

It's incumbent on municipalities to take down borer-infested ash not just to protect other trees nearby — the damage caused by the beetle is also a liability. Once limbs begin to die they become a hazard to anything on the ground, including cars and, of course, people.

Michael Rosen, president of Tree Canada, a charity that promotes forests, said in the Ottawa area where he lives, the impact of the emerald ash borer was "traumatic."

"The effect on the city was absolutely tremendous. There was a lot of neighbourhoods that were totally covered in ash [trees]," he said.

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And now the City of Winnipeg is preparing for the arrival of the emerald ash borer , an invasive beetle that eats and kills all species of ash trees. Invasive beetle has been in Ontario since 2002 and is expected to show up in Manitoba soon.

Emerald Ash Borer , Adult - David Cappaert Invasive .org.

a close up of a hand and a fork: An emerald ash borer larva is removed from an ash tree in Saugerties, N.Y. The insect feeds off a tree's cambium, effectively cutting off its circulation and eventually killing the tree.© The Associated Press An emerald ash borer larva is removed from an ash tree in Saugerties, N.Y. The insect feeds off a tree's cambium, effectively cutting off its circulation and eventually killing the tree.

Between a quarter and a third of all trees in Ottawa are ash, said Rosen.

Just as in Winnipeg, where elm trees form an almost complete canopy on some streets, ash once blanketed older Ottawa neighbourhoods in green. In just a few years, most were gone.

Historic neighbourhoods suddenly felt like new subdivisions, Rosen said.

Ash goes the way of the elm

In Toronto, it's a similar story. Thousands of trees in the city have been cut down in recent years. It's estimated the emerald ash borer could affect 860,000 trees in Canada's largest city.

"It's been an impact that's very visual and one that's quite obvious to the average person," said Janet McKay, a Toronto resident and executive director of Local Enhancement and Appreciation of Forests.

The non-profit works with citizen groups, businesses and municipalities in the Greater Toronto Area to plant trees.

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The Emerald Ash Borer ( EAB ) is an invasive forest pest that devours all three species of Vermont ash trees but you can help find early infestations of EAB by reporting woodpecker damage observed on ash trees.

The threat of introducing Emerald Ash Borer ( EAB ) into Texas is real. It has recently been found as close as Arkansas and Louisiana. Currently, the following states have been quarantined or partially What does IT look like? EAB is an invasive insect that’s a half-inch long with a flattened back.

Growing trees in cities is notoriously difficult. Road salt, compact soil, pollution and Canada's winters all make urban areas unkind to trees.

The first tree of choice in these harsh environments used to be elm trees, which for some reason thrive in urban areas. After dutch elm swept through toward the later half of the last century, municipalities planted ash instead.

a insect on the ground: The emerald ash borer is native to Asia. It was first detected in Canada in 2002 in Windsor, Ont. It is believed the insect arrived in the city from Michigan.© The Associated Press The emerald ash borer is native to Asia. It was first detected in Canada in 2002 in Windsor, Ont. It is believed the insect arrived in the city from Michigan.

"It's a great urban tree but of course, we didn't anticipate this insect coming," said McKay.

Lately, her organization has been replacing the old ash stumps with a diverse mix of trees, including silver maple, Kentucky coffeetree and honey locust. McKay also likes shrubs, like Saskatoon berry bushes, which can help remediate soil and provide food for birds, not to mention people.

'It's quite gross, actually'

Rosen, who has helped municipalities battle dutch elm disease for more than a decade through Tree Canada, said it can be hard to convince residents cutting down trees before they are completely dead is the right move.

Once you can see dead limbs in the canopy of an ash tree it is already infested with sometimes thousands of worms, he said. Peel back the bark and the cambium would likely be carpeted in white larvae.

"It's quite gross, actually," said Rosen. "By the time you're able to visually see the effects you really have to get rid of the tree."

To give a tree its best shot at survival, crews should begin treating it with insecticide before it shows any obvious signs of infection. There's still no guarantee the insecticide will ever completely eradicate the pest, though.

For now, the recommended course is to treat a tree every year or two to keep it alive.

This year, Winnipeg said it will be treating 1,000 ash trees on boulevards and parks, and remove up to 800 trees. The city estimates there are 350,000 ash trees in Winnipeg, about 100,000 of which are on public property.

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