Plum Trees
Q.

Plum Tree Disease

Zone North East | allan G added on June 5, 2012 | Answered

My plum tree has developed blackened leaves, with leaves and fruit dying off.

A.
A.Answers to this queston: Add Answer
Nikki
Certified GKH Gardening Expert
Answered on June 8, 2012

Neem oil is also available in the UK. Some people may know it by Genius oil, which contains the neem. You should be able to do a search on Google for your area to locate retailers.

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Nikki
Certified GKH Gardening Expert
Answered on June 7, 2012

Well, this one has me stumped. I still believe either pests or a fungus of some kind may be attacking the tree. Using both a pesticide and fungicide (like neem oil) should alleviate this. Also, make sure that the tree is getting plenty of water. You may also want to have the soil tested just in case it's something in the soil (or lacking).

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Nikki
Certified GKH Gardening Expert
Answered on June 6, 2012

Black leaves are normally the result of insects, fungus or bacterial issues. Have you noticed any oozing? It could be fire blight. This article will help determine if this is affecting your tree: https://www.gardeningknowhow.com/plant-problems/disease/fire-blight-remedies-and-symptoms.htm

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Nikki
Certified GKH Gardening Expert
Answered on June 5, 2012

If the blackened leaves are soot-like, then it is sooty mold. This happens when the plant gets a pest infestation. I would recommend using neem oil, as this will get rid of the sooty mold fungus and kill the pests. Here is some articles that will help you:
https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

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allan G
Answered on June 8, 2012

Ok will do thankyou

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allan G
Answered on June 7, 2012

Hi Again

Thank you for all your advice. I have never heard of neem oil
(do you realise I live in the UK)

Thank you once again

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allan G
Answered on June 6, 2012

Hi

Thank you but there is no oozing at all.

Leaves just seem to go black, dry then drop off.

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allan G
Answered on June 5, 2012

Hi

Thank your however, the leaves are not soot-like,
they are just turning blackish and dropping off,

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