What is happening to my grafted jujubes?

[castanea]

Many of my new grafted jujubes this year have developed orange highlights at the graft union and now the orange discoloration is creeping upward on a few of them.

Does anyone know what is going on?

jujubemulberry

[jujubemulberry]

i have seen that happen here, but so far no deadly results despite the bark literally splitting and scarring up. Will take a picture when get the chance.

hopefully the reason for what’s going on with yours is the same reason for mine(being scary, but not deadly, at least not yet)

[castanea]

So far all the trees seem healthy, but this is very odd.

[jujubemulberry]

this is very odd.

at least your ‘misery’ has some company
just hoping it is the same minor malady that have experienced . Jujus are knowtn to self-amputate, as if to contain the infection(the infection that is yet unknown to us yanks as to what it might be)

[k8tpayaso]

I have seen that… maybe it’s the colors of their SUPER POWERS!!

[jujubemulberry]

so here is the orange-ish malady that pretty much girdled the sihong-on-contorted graft junction(contorted seen as lower portion with rough bark), which started just like on the photo you posted above. Soon it cracked open but now re-organizing with vigorous creeping cambium.

below is the tree that seems unfazed other than not being overly productive. Graft junction is encircled in yellow

[Barkslip]

Looks like sunburn injury which later splits the bark wide open.

There’s no evidence of canker. So, ??? that’s my guess.

Dax

[clarkinks]

I agree with @barkslip. Dax your likely going to mention or perhaps everyone knows already but painting the trunk is in order. Here is a thread Painting trunks for sunburn and rodents

[Barkslip]

Thanks for mentioning that, Clark.

[castanea]

Mine is absolutely not sunburn.

Where did your trees with the orange stuff come from?