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I need help to iID a disease and it's tree!

Posted by hilde_wny z5 NY (My Page) on
Tue, Jun 7, 11 at 14:33

Hi,
When we moved into our house in 2003 there was a tree on one corner. It was planted when the house was built in 1999. It is a deciduous tree with leaves that start out green and in late May/early June turn purple. It has small berries too, that the birds love. I have never tried them.
The last three years or so I have noticed more and more of the branches get infected by some sort of disease. I don't know what disease it is. Could it be some kind of canker?

What disease is it and is it treatable or do I have to take down the tree? What variety tree is it? I am trying to attach two pictures to help answer the questions. Help is very much appreciated.

Hilde

Image link: I need help to iID a disease and it's tree! (52 k)


Follow-Up Postings:

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RE: I need help to iID a disease and it's tree!

How do I post a 2nd picture? Do I have to upload it to some other website and link to it?

Hilde


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RE: I need help to iID a disease and it's tree!

Hard to tell at that resolution but looks like Prunus and black knot to this Westerner.

Hosting service is required for better and more pix. I use Photobucket.

Dan


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RE: I need help to iID a disease and it's tree!

Thanks Dan! I will see if I can upload the pictures to some site, the 61K file size offered by GardenWeb was very small. Is black knot treatable?

Hilde


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RE: I need help to iID a disease and it's tree!

Dan is right...it is Black Knot of Prunus. Can't tell from that photo, but from the description is sounds like Prunus virginiana 'Shubert' or 'Canada Red'


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RE: I need help to iID a disease and it's tree!

I did a google search on Black Knot and Prunus Virginiana and you are right! Thank you so much! I see a site mentions that you have to remove all infected branches and sterilize the equipment every time you cut off a branch. Does that sound right?

Hilde


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RE: I need help to iID a disease and it's tree!

Yup. Remember how you did it as you'll do it again.

Dan


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RE: I need help to iID a disease and it's tree!

Here is info from my county extention office: http://agsci.psu.edu/fphg/stone/diseases/black-knot

I have 2 sand cherry tree/shrubs that I have been fighting but now have lost the battle. I will not be planting them again.


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