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Speaker 1: Look closely at a maple tree in the past couple weeks,

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Speaker 1: and you may have noticed something alarming.

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Speaker 2: We certainly get a lot of questions, whether what's going

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Speaker 2: on here? Why is this leaf this color? What's this spot?

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Speaker 1: Big growing black patches on the leaves, looking like someone

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Speaker 1: dribbled tar all over. It's appropriately called tar spot, a

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Speaker 1: fungal disease common to maple trees in Europe and North America.

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Speaker 1: Dan Cohen with the treecare company Hartney Graymont says the

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Speaker 1: disease doesn't harm the tree long term. It's mostly cosmetic and.

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Speaker 2: As the season progresses and then the portions of the

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Speaker 2: leaf the tissue actually dies back. That's when it becomes

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Speaker 2: that dark brown black and just generally becomes more noticeable

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Speaker 2: late summer towards a fall.

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Speaker 1: He says, one of your trees having the spots, this

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Speaker 1: isn't really a big deal. It'd be more alarming if

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Speaker 1: the tree began to change color in the summer or

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Speaker 1: one of the branches began to die. Kyle Schaffeld derby

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Speaker 1: Busy Boston's news radio