Brown scab on upper canopy of my avocado tree. What is it?

jumpinjoeJune 21, 2013

Hey all,

Was around my fruiting hass avocado tree today and i noticed a huge brown scab like thingy on the trunk. What is it?. I live in San Diego. Any help is deeply appreciated.

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hoosierquilt USDA 10A Sunset 23 Vista CA(10b Sunset 23)

Photos please. Sounds like Phytophthora Canker to me, but we would need photos to be able to correctly ID the issue. Where on the trunk are you seeing this lesion? Down towards the soil line? If you can take a few photos, both a bit aways from the tree for perspective, then close up, that would be helpful.

Patty S.

Here is a link that might be useful: UC IPM: Canker, Crown Rot

    Bookmark   June 21, 2013 at 10:58AM
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jumpinjoe

Thanks Patty. S i will get photos up ASAP.

    Bookmark   June 22, 2013 at 2:56AM
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jumpinjoe

Tree is along my fence line next to a rose bush and boganbillia

    Bookmark   June 23, 2013 at 7:04PM
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jumpinjoe

Scab

    Bookmark   June 23, 2013 at 7:05PM
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Avocado101(9A Southern California)

I rotated the picture.

    Bookmark   June 23, 2013 at 11:56PM
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hoosierquilt USDA 10A Sunset 23 Vista CA(10b Sunset 23)

I would say this does look like canker to me. Joe, does your avocado's tree trunk get sprayed by your lawn sprinklers by chance? If so, adjust your lawn sprinklers so they do not hit your tree. You'll want to eliminate any possible causes of canker. And, follow the directions from UCIPM in how to treat it. You can also call your local ag agent or, if you have a good orchard supply store near you, they should also be able to advise you and have the proper products to treat this. I'm not sure where in S. Calif. you live, but if you're in N. San Diego county, Grangetto's would be the place to go for further advice and products.

Patty S .

    Bookmark   June 25, 2013 at 9:38AM
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jumpinjoe

Im in the south bay area near eastlake. Ill check my local nursery. Thanks for the help. I appreciate it.

    Bookmark   June 25, 2013 at 7:25PM
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