Why so many dead/dying trees in San Diego?

BBBTree

BBBTree

Location
CA
The trees are dying off too easily, and they were doing okay to get to their current stage of growth. Maybe it's water limits on irrigation leading to stressers and so forth. It's very interesting, and I'd like to know. I'm surprised no organization or any chat forums have any information online yet.

Any ideas?
 
No, and it's only some areas. I took a drive east to the Cleveland Forest, and I only saw a small patch of Eucs dying off. All other trees were flourishing. I can drive around the main city area, and I can count so many trees dying or dead that I'm constantly think wth. Even the young trees that are 10-20 feet x 4-8" are dying by the masses, and I'm not sure that they are all small Jacarandas. The fact is I don't see a good Jacaranda anywhere small or large. The Jacaranda Tree is the most common dying, and the Olive is second to that.

I probably should figure it out, and report it.
 
How long have you been in the tree business BB?

Have you gotten out of your vehicle and actually looked at any of these supposedly dying/dead Jacarandas?

Do you realize that jacs are deciduous trees, not evergreens?

jomoco
 
Aside from the Gold Spotted Oak Borer wiping out native Coastal Live Oaks(Quercus agrifolia) by the tens of thousands throughout SD county?

The primary culprit killing trees in SD right now are idiot tree services whacking the snot out of pines and eucs during the height of beetle flight season. By summer's end thousands of pines and eucs will be dead as a door nail because these idiot's greed for money supercedes their integrity as professional arborists.

They go out and whack these beetle susceptible tree species every spring/summer season here, essentially ringing the dinner bell for the beetles.

Whereas the pros have enough knowledge and integrity to inform their clients to put off any pruning of these tree species until late fall and winter.

It happens every year here, and as you can probably tell, it really ticks me off!

jomoco
 
Enough years to know how to get out of the truck, and do some research. I hope that's enough :)

Well anyway, the trees look like total azz around here, but I guess I'm alone on that. I looked at a job for an HOA recently, and I noticed they had sick Olive Trees. I inspected all of their trees, soil, irrigation and so forth looking for cause of the die off. Nothing. I drove around the area to other HOAs and the rest of the neighborhood. 30% of the total Olive Trees in that area are dead or dying, so it wasn't just every single Olive Tree on my client's property. After finding some literature about Olive diseases online mainly from the UC system, the closest thing I can link the deaths to is Root Rot. Correct me if I'm wrong, but I think the only way to kill the fungus is to not water the trees, but that will kill the rest of the landscape in the process.

That's the best I could do without talking to Arborists and/or testing soil samples yet. No time or money for it, but I certainly would. I'd like to know, and get the reasons published.

Thanks for the heads up about the borers and that.

Deciduous Jacaranda branches or not they aren't coming back to life. They're dead, and they snap off like they are dead.
 
I don't doubt some of the lower branches are dead on the jacs, very common. However I'd be totally shocked if the whole tree's dead without a herbicide being involved. The very jacs you think are dead will most likely be blooming a profuse purple a month or so from now.

As for your olives being sick or dying? Yeah, that makes far more sense, and the culprit doing them in is probably Verticilium Wilt, very common in this area. But you'll never know because you're apparently too lazy to take an infected sample to the county ag lab for a FREE diagnostic analysis and report!

Poor darling...

jomoco
 
Poor is right. FREE? Nice to know. I can obviously handle that arb duty.

Thanks for lead on the common Olive disease. I saw some great ones keeled over. Not good. I'll look that one up now, and I might go snapping some shots of these jacs I'm talking about for you. Shouldn't all of their leaves be back in full by now. It's in the 90's and in May now?
 
The jacs have stored all their energy for their blossoms which will bust loose any time now BB.

This is a jac pic taken today, and to an amateur it might appear to be dead or dying. But believe me, a few weeks from now it'll be a pure purple cloud.



jomoco
 
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