bur oak too far gone?

Location
Ames
I was working across the street from this oak and spoke with the client, they had the other oaks in their yard and the neighbors treated for oak Wilt a few years earlier, the other oaks look pretty good at this one looks rather rough (although no bronzing on the leaves that I can see). could it be borer damage?
this kind of leads to a bigger question: How do you discern If tip die back in the canopy is borers versus something else (assuming no recent construction or excavation nearby)?
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grade change?
Surface water change?

Climbing up and taking twig samples might be in order. Try to find what twig elongation the tree has put out for a few years.

Your local Land Grant College may have someone who knows more.
Take the samples after your local oak wilt overland spread risk window has passed (likely October-ish...?)
 
Take the samples after your local oak wilt overland spread risk window has passed (likely October-ish...?)
yeah I live close to Iowa State University. so I have taken samples there, however, doesn't oak Wilt always exhibit bronzing on the leaves?

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yeah I live close to Iowa State University. so I have taken samples there, however, doesn't oak Wilt always exhibit bronzing on the leaves?

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Wasn't suggesting the problem is oak wilt. I'm suggesting that you not prune the tree (even to take samples) during high risk oak wilt transmission times. If you do, paint the wound.
 
@The Green One Thanks for that, good video about bur oak blight, my professor in college at Iowa State was pretty significant in studying that disease!
@Brando CalPankian are you saying you think it looks like BOB? I just didn't see any shriveled leaves... your observations of seeing both issues together make sense, thanks for sharing!

I'm thinking I will suggest amidicloporid for borers and cambistat for tree vigor – but be careful not to over promise, Tree might be too far gone but they could try. does this seem like a reasonable direction?

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@The Green One Thanks for that, good video about bur oak blight, my professor in college at Iowa State was pretty significant in studying that disease!
@Brando CalPankian are you saying you think it looks like BOB? I just didn't see any shriveled leaves... your observations of seeing both issues together make sense, thanks for sharing!

I'm thinking I will suggest amidicloporid for borers and cambistat for tree vigor – but be careful not to over promise, Tree might be too far gone but they could try. does this seem like a reasonable direction?

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Joster,

Me personally even with 30% canopy loss I would still give it a go, and try and stop the downward spiral. My "opinion" is subjective as I always try the best I can to save trees.

You cannot promise anything to the Client, other than you are trying to save the declining tree...sometimes it works!

How is the soil under the Canopy? Any disturbances in the last few seasons? Healthy Root collar/Butress roots and good soil volume? Is the client willing to irrigate correctly in periods of Drought stress? Any traffic changes within the dripline/tree protection zone?

Many of The Two Lined Chestnut Borer Adults in Iowa have laid their eggs (especially stressed trees) and the Larva are "Active" now, so I would avoid the Imidacloprid drench (too slow uptake) and instead go with a "Basal Trunk Spray" of Safari/Dinotefuran (fast uptake) instead.

That should cover/control THIS seasons single generation of TCB larva up in the Canopy, where there is still "functional water movement/active transport that has not been cut off from active larva.

Regarding the Shortstop PGR, 1/2 rate would be 75-100 mL per D.B.H., and ATH's above post comments make a lot of sense on this tree! (Don't want to hit the brake too hard)

On stressed trees (my own Best Management practice) I also like to do a Reliant (potassium phosphite) drench beginning 2 feet out from the root Collar, out to 50 % of the dripline. A tree your size would get 12 ounces of Reliant to 100 gallons of water. (25 gallons per 100 sq. ft.)

I like the Reliant to stimulate/energize (help) the plants Vigor.

Next Spring would be the timing to make the Trunk Injection with Alamo, as the Earlywood is still forming so you can get good uptake/protection.

It will be "watchful waiting" and inspections to monitor any changes. Take photos for yourself to pickup on changes, while under your care.

Good luck to you and the Oak!
 
On stressed trees (my own Best Management practice) I also like to do a Reliant (potassium phosphite) drench beginning 2 feet out from the root Collar, out to 50 % of the dripline. A tree your size would get 12 ounces of Reliant to 100 gallons of water. (25 gallons per 100 sq. ft.)

I like the Reliant to stimulate/energize (help) the plants Vigor.

I would love to learn more about this. How does reliant stimulate/energize the plants vigor? I only have experience using reliant to suppress phytophthora.
 
I would love to learn more about this. How does reliant stimulate/energize the plants vigor? I only have experience using reliant to suppress phytophthora.
Here is some good reading material on this FJR.




RELIANT is a systemic fungicide which has both xylem and phloem mobility,
in that it will move systemic throughout all parts of plants. It will move from
plant roots into the newly emerging shoots and conversely from new shoots
into the root system.
RELIANT is absorbed by all plant tissue regardless of where or how it is it is
applied and is directly fungistatic, in that it slows the growth of the disease
pathogen and inhibits the formation of new spores by the pathogen.
When absorbed by the plant RELIANT directly effects plant metabolism by
stimulating the production of ATP and ADP along with the defensive
response of accumulation of phytoalexins (immune bodies) similar to that in
humans. These phytoalexins enhance the activity of the plant’s dynamic
defense system, causing rapid changes within the cells of lytic enzymes,
thickening of cell walls, higher cell pressure and lignification to occur within
the cell.
This increase in “plant robustness” is sometimes called “Systemic Acquired
Resistance” and can directly off set the onset of pathogen attack. Below is
an unprotected cell under pathogen attack.
This very complex mode of action can be simplified into making the plant
more “robust healthy, ready to withstand pathogen attack” and
environmental stress.
Other physiological effects observed after applications of RELIANT to
various plant species are: bigger blooms, increase in color or intensity of
color of both leaves and blooms, initiation of root growth, larger fruit set or
increase on fruit set, auxiliary bud break and a very pronounced observable
overall increase in plant health and vigor. All treated plants will demonstrate
one of these effects but not all plants will show all effects.
 
Here is some good reading material on this FJR.




RELIANT is a systemic fungicide which has both xylem and phloem mobility,
in that it will move systemic throughout all parts of plants. It will move from
plant roots into the newly emerging shoots and conversely from new shoots
into the root system.
RELIANT is absorbed by all plant tissue regardless of where or how it is it is
applied and is directly fungistatic, in that it slows the growth of the disease
pathogen and inhibits the formation of new spores by the pathogen.
When absorbed by the plant RELIANT directly effects plant metabolism by
stimulating the production of ATP and ADP along with the defensive
response of accumulation of phytoalexins (immune bodies) similar to that in
humans. These phytoalexins enhance the activity of the plant’s dynamic
defense system, causing rapid changes within the cells of lytic enzymes,
thickening of cell walls, higher cell pressure and lignification to occur within
the cell.
This increase in “plant robustness” is sometimes called “Systemic Acquired
Resistance” and can directly off set the onset of pathogen attack. Below is
an unprotected cell under pathogen attack.
This very complex mode of action can be simplified into making the plant
more “robust healthy, ready to withstand pathogen attack” and
environmental stress.
Other physiological effects observed after applications of RELIANT to
various plant species are: bigger blooms, increase in color or intensity of
color of both leaves and blooms, initiation of root growth, larger fruit set or
increase on fruit set, auxiliary bud break and a very pronounced observable
overall increase in plant health and vigor. All treated plants will demonstrate
one of these effects but not all plants will show all effects.
What an awesome post. Thank you! I will read up.

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