Need some help identifying Apple disease

Hello,

Early this summer we moved into a home with an apple tree. The previous owner said it was a 6-7 year old red delicious. It's definitely not the variety that I would have chosen,  but I want to keep the tree alive.

It has a few apples on it right now that look good, other than the fact we had to cover them to protect from birds. I found this branch with oozing stuff coming from it this morning. The leaves in that particular branch are spotted yellow/orange. Any help identifying the problem would be greatly appreciated!

Ummm... Maybe fireblight? See this for a lesser damaged tree: https://permies.com/t/91724/Apple-diseases

Maybe someone in the know will be along soon.

My Antonovka- planted as a seedling in spring 2021 does not look too good. I have the other one that looks normal and two more that I grafted this year and the scions are growing well.
I'm attaching 3 images:

Zach Allen wrote:Hello,

Early this summer we moved into a home with an apple tree. The previous owner said it was a 6-7 year old red delicious. It's definitely not the variety that I would have chosen,  but I want to keep the tree alive.

It has a few apples on it right now that look good, other than the fact we had to cover them to protect from birds. I found this branch with oozing stuff coming from it this morning. The leaves in that particular branch are spotted yellow/orange. Any help identifying the problem would be greatly appreciated!

I'm guessing that you might have some kind of canker disease on your Red Delicious. Fire blight usually looks a bit different, with gray, burnt-looking leaves, wilting and a "shepherd's crook" look on the tips of some "burnt" branches, so I don't think it's that.

If possible, I would cut off the infected branch with a clean saw or pruners and then burn the infected material or throw it in the trash. Here's a video about how to do it:



By the way, I'd use alcohol, rather than milk, to disinfect your pruning tools. Good luck!

Cristobal Cristo wrote:My Antonovka- planted as a seedling in spring 2021 does not look too good. I have the other one that looks normal and two more that I grafted this year and the scions are growing well.
I'm attaching 3 images:

My rough guess is that your Antanovka is experiencing climate change heat extremes and is not well adapted for it. This extremely cold hardy variety of rootstock is from the steppes of Russia, and is adapted to go down to -50 F! I'm thinking that your tree can't deal with the intense heat wave we are now experiencing on the West Coast. This is assuming that your part of California has getting 100 degree plus days for the past 2 weeks like we have in Oregon. I've noticed lots of scorched plants at my place, especially those that aren't getting watered. Maybe your grafted trees aren't as affected by the heat because the scions are from a warmer climate, but I'm not sure.

I'd try to weed, mulch and give the affected tree plenty of water, and prune off any dead branches with clean tools. Then graft scions on to it next winter that are more adapted to heat. Just my 2 cents... Good luck!

Thank you M.K.

Yes, I'm in the part of California where for last two weeks I was getting 41-42 C (106-108 F) daily, however the symptoms started a week before the heat wave. All other apple trees (and another Antonovka) are doing ok with the same watering, mulching, etc. The suckers from the affected tree are growing the same like in other Antonovkas.