Ask a Question forum: Eucalyptus trees, Help!

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Santiago, Chile
JuanChile
Feb 5, 2018 7:04 PM CST
Good day, If anyone can help me to identify what is going with my Eucalyptus.

I got few eucalyptus on my property in the central region of Chile (similar weather to California), 16404 feet of land, recently a deep well (196 feet deep, heavy use for the last 2 months) was drilled very close to a property just 32 feet a distance to the next close eucalyptus. Well, those old ones started to leak resin, like a wound, and those younger started to look like this, touched and it come out pretty easy, and there is resin inside. Those eucalyptus by the end of the property do look healthy. Can anyone, please, give a comment what might cause it, because I cannot find any illness on the web similar to this. Thanks in advance..
Thumb of 2018-02-06/JuanChile/d39d50


Thumb of 2018-02-06/JuanChile/dc3586

[Last edited by JuanChile - Feb 5, 2018 7:21 PM (+)]
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Name: Carol
Santa Ana, ca
Sunset zone 22, USDA zone 10 A.
Charter ATP Member Hummingbirder Lover of wildlife (Black bear badge) Orchids Region: California Plant Identifier
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ctcarol
Feb 5, 2018 7:24 PM CST
This may help http://cisr.ucr.edu/eucalyptus...
Santiago, Chile
JuanChile
Feb 5, 2018 7:37 PM CST
Hmm, thank you so much.

One thing it is not clear to me, it does say that "Phorocantha beetles are attracted to freshly cut eucalyptus wood, dying limbs, and trees suffering from stress, especially lack of water, As the tree grows it constantly renews phloem and xylem tissues, and only the new xylem and phloem transport water and nutrients. Beetles suffer high mortality in trees with high internal moisture levels because water floods feeding tunnels and drowns larvae."
My doubt is did it happen due to the new deep well (heavy use on daily basis) o it was an issue before that (3-4 months time frame) we are in the summer season here. And I own the property for the last 3 years, first time I see it.
[Last edited by JuanChile - Feb 5, 2018 7:45 PM (+)]
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Name: Carol
Santa Ana, ca
Sunset zone 22, USDA zone 10 A.
Charter ATP Member Hummingbirder Lover of wildlife (Black bear badge) Orchids Region: California Plant Identifier
Image
ctcarol
Feb 5, 2018 7:51 PM CST
Possibly the new well caused depleted water supply to those trees? I don't know. California has removed many Eucalyptus trees due to the borers, and I have been able to push over dead young trees in freeway plantings. At one point they had developed a pesticide that was injected to kill them ( I got to try it at a demonstration), but I have no idea if it was ever approved in California.
Santiago, Chile
JuanChile
Feb 5, 2018 8:15 PM CST
ctcarol said:Possibly the new well caused depleted water supply to those trees? I don't know. California has removed many Eucalyptus trees due to the borers, and I have been able to push over dead young trees in freeway plantings. At one point they had developed a pesticide that was injected to kill them ( I got to try it at a demonstration), but I have no idea if it was ever approved in California.


Thank you again. Just learned something new.

Found some Chilean government studies, Phoracantha beetles is very common in Chile, it is associated merely due to the lack of water in the central region.

Just for future references this might work for someone.
sag.gob.cl/sites/default/files/deteccion_y_control_biologico_del_eucalipto_en_chile_phoracantha_semipunctata_fabricius_y_phoracantha_recurva_newman_coleoptera_cerambycidae.pdf

Thank you again, very helpful.
[Last edited by JuanChile - Feb 5, 2018 8:17 PM (+)]
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Name: Carol
Santa Ana, ca
Sunset zone 22, USDA zone 10 A.
Charter ATP Member Hummingbirder Lover of wildlife (Black bear badge) Orchids Region: California Plant Identifier
Image
ctcarol
Feb 5, 2018 8:25 PM CST
Happy to point you in the right direction.
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
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DaisyI
Feb 5, 2018 8:37 PM CST
Yes, it looks exactly like borers. Sighing! I talked to my geologist daughter. She says that a large well could easily drop the water level in an aquifer quickly enough to cause stress related problems in trees. The borers were already there but kept at bay by the high water table.

In California, we took down over 150 20-year-old Eucalyptus because of the borers. After the Eucalyptus were gone, they attacked my fruit trees. Luckily, my best friend is a farmer and has a permit to get stuff that the rest of us can't. It took about 3 years (and half my orchard) to eliminate all of them.

But thinking about it, we were on river bottom (high water table). We lost all the trees during the last California drought. Previously, we hadn't even bothered to water them. You are living the right scenario.

I can't remember what the pesticide was called - we didn't inject it, we poured in on the ground around the trees once a month during the winter (targeting the over-wintering larva). Whatever it was, it didn't transfer to the the fruit or nuts (she's a Pecan farmer).
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

Webmaster: osnnv.org
Santiago, Chile
JuanChile
Feb 5, 2018 8:54 PM CST
OMG! I got a lot of fruit trees!!! Can u please let me know if u would remember what kind of pesticide did u use!?

Thank u.

Now that I am thinking, few of my poplars are getting dry too, could not figure out why!


Thumb of 2018-02-06/JuanChile/dd0712

Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
Image
DaisyI
Feb 5, 2018 9:09 PM CST
Just texted my girl friend. She says its called "Lindane" here. She will go read the active ingredients tomorrow (probably pretty dark in the barn this time of night).

I imagine you can Google that and get the ingredients.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

Webmaster: osnnv.org
Santiago, Chile
JuanChile
Feb 5, 2018 9:15 PM CST
DaisyI said:Just texted my girl friend. She says its called "Lindane" here. She will go read the active ingredients tomorrow (probably pretty dark in the barn this time of night).

I imagine you can Google that and get the ingredients.


Of course I can Smiling . Thank u very much.

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