Bacterial Leaf Scorch

this is the study we collected samples for...WOW it was more than 10 years ago;;;the data for this map is what we collected for ....to check the diseases progression across the state... it was kind of neat to go out and collect samples all day , label them annd then take them to the lab.. they need a new survey!!
 
I agree that you can improve the heath of the one tree to decrease the affects of the bacterium, but you still need to look at that tree as a source of inoculum for the surrounding trees. Sometimes you have to sacrifice the one for the community.


Here is some more recent research of BLS:

Characterizing Xylella fastidiosa subsp. multiplex in symptomatic northeastern and mid-Atlantic oak trees.
G. BEHRINGER (1), A. B. Gould (1), D. Kobayashi (1)
(1) Rutgers University, New Brunswick, NJ, U.S.A.
http://www.apsnet.org/meetings/Documents/2012_Meeting_Abstracts/aps12abP495.htm

and here's a whole list of published research articles on Xylella fastidiosa through the American Phytopathological Society:

http://apsjournals.apsnet.org/action/doS...p;filter=single
 
I dont know a whole lot about it, but would a systemic insectiside prevent the disease from spreading by leaf hopper? This would leave us to solve the spread from pruning by sanatizing our tools between trees/cuts.
Again Im not a PHC tech, we have a dept for that, I'm just wondering if it would work or slow the spread significantly.
 
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The antibiotics only mask the symptoms, it does not reduce the chances of spread because it does not kill the bacterium.

[/ QUOTE ]

But Im not talking about killing the bacterium... I am talking about using a systemic insecticide to kill the bug that carries it to the next tree before it can do so. Not even talking about masking anything. If you can control the spread better, you can prune out the symptomatic limbs (with sanitation) and have a better looking tree for a few (or many) more years.
 
Ah, gotcha. The only problem is in order for the insect vector to be exposed to the systemic insecticide it has to pierce it's bacterium-covered mouth parts into the tree. So, it will kill the insect, but the bacterium would already be introduced.
 
Some questions remain here: how long do those mouthparts have to be attached for transmission? How long does it take for the poison to kill the bug? How far do the bugs fly--does it really make sense to "sanitize" a neighborhood by felling all nearby infected trees, if bugs will still be in range of infected trees?

My limited experience with the pest is that deadwooding every year or two slows the advance enough to be worthwhile. I've seen BLS stall when root work was done.
 
Maybe these will help:

Insect Transmission of Xylella fastidiosa to Pecan:
http://apsjournals.apsnet.org/doi/pdf/10.1094/PDIS-94-4-0465

Homalodisca coagulata (Hemiptera, Cicadellidae) Transmission
of Xylella fastidiosa to Almond:
http://apsjournals.apsnet.org/doi/pdf/10.1094/PDIS.2003.87.10.1255

Vector Transmission of Xylella fastidiosa to Dormant Grape:
http://apsjournals.apsnet.org/doi/pdf/10.1094/PD-89-0419

Role of Cyclic di-GMP in Xylella fastidiosa
Biofilm Formation, Plant Virulence, and Insect Transmission:
http://apsjournals.apsnet.org/doi/pdf/10.1094/MPMI-03-10-0057
 
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