Invasive beetle fells mighty oaks

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Invasive beetle fells mighty oaks
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The trees were first introduced to South Africa in 1656 and have become cultural icons

Lost your password? Please enter your username or email address. You will receive a link to create a new password via email.Lost your password? Please enter your username or email address. You will receive a link to create a new password via email.This could forever change the treescape of towns and cities such as Cape Town, George, Paarl, Stellenbosch and Swellendam, according to a team of researchers at Stellenbosch University.

Gildenhuys found that three oak species — the English oak, pin oak, and cork oak — have become benign invaders along riverbanks ​and the urban-wildland interface ​in Stellenbosch and Cape Town. These oaks do not cause major problems now but may do so in the future.​ When a shot hole borer infects an oak tree, it will inevitably kill it because there is no cure. “And it’s been spreading from Somerset West to Cape Town to Stellenbosch and Johannesburg.”

Trees make a vital contribution to lessening the effect of climate change by reducing heat stress in urban areas, said, the interim director of the School for Climate Studies. But the way that thousands of diseased trees are disposed of may significantly affect carbon emissions. Stellenbosch, the second oldest settlement in South Africa, is known as the “Eikestad” or “Oak City” because of the oaks planted along its streets and in gardens and parks, the researchers said, noting that oaks are present in many towns and cities outside the Western Cape.

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