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PostPosted: Sun Oct 29, 2017 6:26 pm 
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Joined: Mon Apr 10, 2017 7:33 pm
Posts: 54
Location: Central Scotland
Could anybody tell me what this is, what causes it, and if I need to take any action. I would describe it as a black fungus, but I saw no aphids on the leaves. The plant was planted last year as a small division, in a raised bed, and has been dwarfed, somewhat unexpectedly, by the vigourous new growth of the adjacent plant. Therefore, could it be stress-related, as you sometimes see with conjested shrubs? Thanks in advance!
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PostPosted: Sun Oct 29, 2017 7:07 pm 
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Joined: Tue Sep 26, 2006 8:51 am
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Location: SE England, UK 400ft Zone 8/7 Low usually 28F, -4C (-10, -12, -14, -1, -6C last 5); High 90F, 32C
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Can you wash it off with a wet cloth?

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PostPosted: Sun Oct 29, 2017 8:27 pm 
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Location: Central Scotland
iain wrote:
but I saw no aphids on the leaves.

Oops! I just brought a leaf into the house with the intention of wiping it with a cloth and found the underside crawling with aphids!
Thanks for your response, Chris, and for your website, which has the most detailed descriptions. http://bamboo-identification.co.uk/html ... tml#aphids
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