Bacterial canker? Gummosis? Borer Damage? Apricot and Aprium

Good day to everyone.

I noticed sap weeping groom two of my young fruit trees. One is a Katy apricot and the other a Cot-n-Candy Aprium. The Katy has the above ground weeping while the aprium has some sap in the dirt near the soil line. The aprium is on its second year in the ground she the apricot was planted this spring.

I actually lost another Katy Apricot (1st year in the ground) last summer from weeping around the graft as it declined all summer until dead.

Last year I looked for any holes to indicate a borer but didn’t find anything.

Are these two trees doomed or is there something I can do now?!

Thanks ahead of time.

Am now I’m reading it might be bacterial canker?

I’ve read some preventative measures like sulfur spray and removing infected areas and painting /sealing the cuts, but I didn’t find anything on treating the base of the trunk itself.

I would think the sap layer would in some part isolate the area from further infection? Or should I remove the sap and spray /paint it?

If it is bacterial canker, which is does look like it could be, I don’t think there is anything you can do when it strikes that far down the base of the tree. If you do try to cut it out, I’ve read on here that mixing in copper with your paint / wash that you apply over it can better help protect the wound from reinfection

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Updated photo of Katy apricot with what I guess is gummosis.

This is the same variety of apricot that died of something similar last year. This is a bare root I
planted this spring to replace it.

It’s definitely a dying tree now as all the leaves are starting to lay flat or droop.

Should I dig it up and replace the soil? I’m thinking the closest I should come to an apricot here should be an aprium… Though I don’t know if the problem would be the same?

Before I get comments about the watermelon vine at its base, the problem was well underway before I planted the melons.

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If you don’t find any borer’s holes, my first guess would be Cytospora aka perennial canker.

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Last year before I burned the other tree I looked and didn’t see any holes.

The sap was mostly clear when it runs… Only turning darker over time. My viewing of borer damage looks a bit different.

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Just read the symptoms but the only one that matches is the weeping.

I’ll peal away some of the sap and see if I can find any holes.

Regardless I think I’ll take the tree out and dump the soil somewhere… Maybe my front open ditch.

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Try disinfecting the soil using hydrogen peroxide or something like oxidate and a biological control agent lie actinovate sp. the H2O2 will kill beneficial microbes too, but you can reintroduce some with a good compost.

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The base of the first photo looks like crown gall. If it’s spongy and breaks off easily that’s probably what it is.

I’ll check

I pulled away a lot of the sap from the base of the tree and the trunk with my gloved hand.

It all had the same consistency so I assume it’s all sap. I didn’t see anything that looked or felt different in any way. It was pliable in my hand but still pretty dense.

First photo here shows the trunk after I’ve removed much of the sap. At the top of the colored sap you can see a small leafless branch that has clear sap leaking around it.

Next photo shows the foliage of the apricot.

The last photo is a comparison to how the foliage looks on an aprium.

Now I may well be reading into how the tree looks health wise knowing what happened last year to the same variety apricot. And the aprium isn’t an apricot but the leaves are similar. Also the growing habit of the Katy apricot is more horizontal on the scaffolding so perhaps the leaves just hang differently.

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My guess is that apricot/aprium isn’t enough difference to matter. They’re both essentially apricots. Pluots would be very much like Japanese plums. All are going to have serious disease issues in your location.

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BTW my Flavor Grenade Pluot seems to be the happiest and healthiest tree. The leaves reveal it’s predominantly plum heritage.

Photo of the FG

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I was talking about the first photo, I think- at the base of the tree against the ground.



Different tree. That is an aprium that is overall healthy and growing well.

I’ll need to look at that and read up as you’ve already suggested one treatment I can use.

Thanks for clarifying. I’ve been thinking of the tree that is obviously dying.

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Gall generally has to girdle the tree to kill it and trees are often able to outgrow it. Lucky for me.

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@Shibumi I found this thread on citation root stocks being susceptible to gall. Is your tree on citation?

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I went and look at the base of my Summer Delight Aprium which is also a DWN tree and on Citation. There seems to be something that looks like crown gall, although I had seen this before when planting I thought it was something related to Apricot’s grow habit which is knotty. Is this crown gall?

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The current Peaceful Valley (groworganic) website shows the Katy apricot on Rootpac-R.

So mine IS on Citation… Bummer. That same tree is now on Rootpac-R in their catalog which is supposed to be good wet soil tolerant.

I’m going to graft a few scions from this tree to others to try to at least get some of the wood growing for future grafting of a new tree.