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14th September 2008, 02:14 AM
| #1 |
| I'm new here so be nice Join Date: Sep 2008 Location: Florida
Posts: 4
|  Japanese Blueberry Tree black coating?
Our Japanese Blueberry Tree has developed a black coating on the leaves. A neighbor says it is a pseudomonas plant disease. Anyone know about this or the treatment? j. |
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14th September 2008, 10:27 AM
| #2 |
| Semi-mature vigorous tree  Join Date: Nov 2007 Location: PC
Posts: 176
| Re: Japanese Blueberry Tree black coating?
I'm not familiar with Japanese blueberry tree. Do you have a latin name?
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14th September 2008, 11:55 AM
| #3 |
| Semi-mature vigorous tree  Join Date: Jun 2008 Location: the netherlands
Posts: 187
| Re: Japanese Blueberry Tree black coating?
Try to get some pictures. That will help giving you the right advice
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14th September 2008, 01:26 PM
| #4 | |
| I'm new here so be nice Join Date: Sep 2008 Location: Florida
Posts: 4
| Re: Japanese Blueberry Tree black coating? Quote:
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14th September 2008, 02:03 PM
| #5 |
| Veteran Heritage Status  Join Date: Feb 2007 Location: Townsville Nth Queensland & Gold Coast Sth Queensland
Posts: 1,981
| Re: Japanese Blueberry Tree black coating?
Very hard for anyone to comment meaningfully without pics.....however does the black coating look a bit like this?  It could be sooty mould, an indirect result of scale insects or some other sap sucking insect. It is not uncommon for Elaeocarpus sp. |
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14th September 2008, 08:53 PM
| #6 |
| Admin - Owner Palm & Tree Services in Brisbane  Join Date: Jan 2007 Location: Brisbane
Posts: 12,992
| Re: Japanese Blueberry Tree black coating?
White oil to remove the sooty crap and spray with the ole Confidor to kill the bugs that suck!  Sap suckers secrete honeydew, mould spores attach and grow, kill the sap suckers kills the food source for the mould. However whatever mould is already there on the leaves will stay until washed off, that's where the white oil helps. Or you can be a genius like this tree fool was and butchered the entire canopy to remove the problem (temporarily whilst creating a hazard tree).  Who are you going to call? Tree Busters!
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14th September 2008, 09:05 PM
| #7 |
| Semi-mature vigorous tree Join Date: Jun 2008 Location: the netherlands
Posts: 187
| Re: Japanese Blueberry Tree black coating?
Ekka please explain the ole confidor part, I have done a lot of work here on finding an eco-friendly way of getting rid of the suckers.
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15th September 2008, 03:57 AM
| #8 | |
| I'm new here so be nice Join Date: Sep 2008 Location: Florida
Posts: 4
| Re: Japanese Blueberry Tree black coating? Quote:
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15th September 2008, 07:21 AM
| #9 |
| Semi-mature vigorous tree Join Date: Jun 2008 Location: the netherlands
Posts: 187
| Re: Japanese Blueberry Tree black coating?
Looks like Sean was right.  |
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18th September 2008, 10:35 PM
| #10 |
| Mature tree Join Date: Mar 2008 Location: Austin, Texas
Posts: 373
| Re: Japanese Blueberry Tree black coating?
While it could be a scale problem it looks like (and is quite common around here) an aphid problem. SaferŪ insecticidal soap mixed with Neem Oil should take care of it easily and safely.
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18th September 2008, 10:39 PM
| #11 | |
| Admin - Owner Palm & Tree Services in Brisbane Join Date: Jan 2007 Location: Brisbane
Posts: 12,992
| Re: Japanese Blueberry Tree black coating? Quote:
Seems the better of the chemicals to use. Bayer Confidor Garden Insecticide (Sachets) - Yates What's your eco-friendly way?
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19th September 2008, 09:18 AM
| #12 |
| Semi-mature vigorous tree Join Date: Jun 2008 Location: the netherlands
Posts: 187
| Re: Japanese Blueberry Tree black coating?
We use different methods. Not really succesful however. The first method is using Adalia bipunctata This monster eats the lyces that produce the honeydew.  We hang the larve of this bug in the lower part of the tree. They are delivered to us in small bags which contain 100 specimen. How many bags depends on the diameter of the tree. This method is used in greenhouses a lot and we also have good results with this method. The other thing we use is a mixture made of garlic and some other stuff.  This stuff really stinks. We didn't have good results with our tests. |
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19th September 2008, 01:33 PM
| #13 |
| Part of the Furniture  Join Date: Jun 2007 Location: orlando,fl
Posts: 4,948
| Re: Japanese Blueberry Tree black coating?
Sean is right on.
__________________  Have your say join us today. old schooler |
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19th September 2008, 02:01 PM
| #14 |
| I'm new here so be nice Join Date: Sep 2008 Location: Florida
Posts: 4
| Re: Japanese Blueberry Tree black coating?
Thank you all for the information and suggestions. I'll give them a try. |
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4th October 2010, 08:20 AM
| #15 |
| I'm new here so be nice Join Date: Oct 2010 Location: ruskin fl
Posts: 1
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hello! My name is Shellie! I would like to know the season to trim japanese blueberry? |
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4th October 2010, 10:03 PM
| #16 |
| Mature tree Join Date: Mar 2008 Location: Austin, Texas
Posts: 373
| Re: Japanese Blueberry Tree black coating?
Your part of the world seldom sees cold temps - trees in your area sometimes put on 2 rings a year. You can trim the blueberry whenever you feel the need. Farther north, you would wait until mid-February.
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