Help me ID these apple problems
I generally do not spray my apples trees much, unless a specific problem is present. And until this year it has worked out quite well, getting mostly pest/blemish free fruit. This year however, I am seeing two very common problems on the Lodi apples I just harvested, which I'd like help identifying:
The first problem is a coarse grey/brown patch on the apple skin, surrounding where the stem attaches to the apple. It varies in size from 1/4" across up to an inch or more, irregular in shape. On some of the larger patches there are also cracks in the skin down through the flesh. I don't notice any signs of insect eating inside the apple under these patches, so I think they maybe due to fungi/bacteria, or perhaps some bug chewing from the outside?
The second problem is numerous tiny tunnels in the apple flesh. These tunnels are almost thread-like in size, and would not be noticeable at all except that the flesh is brown colored along the thread/tunnel, like when you leave a cut apple exposed to air for a while. The tunnels seem to wander around under the flesh, and do not have a particular destination (like out to the skin so whomever can escape). Whatever insect did these, they must be very tiny. I did not see any "worms" present in these tunnels in any of the cut apples, although plenty of these tunnels/threads. Any thoughts about what these might be from and how to combat them?
I might add, that our high elevation, cold temps, and dry climate generally cut way down on the number of insect and bacterial/fungi problems compared to most growing areas. However this past season has been unusually warm and wet, so perhaps I am starting to see some of the common fruit problems.