Thank you for your question.

This is strictly an online forum composed of Master Gardeners throughout the state. While I’m sure you left a message at some number, your question was never brought to our attention. Thanks for reaching out to us a second time.

Let me comment upon each of the three pictures you submitted:

Image 8191 (Zestar):

1). The most obvious features on the fruit are small, dark spots on the surface. This is a good diagnostic feature of Apple Scab. This is a fungal (Venturia inaequalis) disease that often occurs during May and June when cool and wet conditions prevail. Zestar apples are reasonably susceptible to it. Scabby fruit is generally unfit for eating. The best way to combat this disease is to plant scab resistant trees. Obviously, this does not help your present situation. Fungicide treatment is probably the only recourse for you. Any affected fruit that falls should be immediately picked up and discarded. You should also do this for any leaves that drop, especially in the fall. See the following for further information including remedial and preventative measures:

https://extension.umn.edu/plant-diseases/apple-scab

https://ipm.ucanr.edu/agriculture/apple/apple-scab/ - gsc.tab=0

https://pddc.wisc.edu/2018/11/19/apple-scab/

2). To a lesser extent I suspect that there are signs of an Apple Curculio infection. I say this from looking at the crescent-shaped scars that appear on some of the fruit. This is attributable to a particular weevil (Anthonomus quadrigibbus). However, these same symptoms can also be seen when there is a Plum Curculio attack. This is due to a different weevil (Conotrachelus nenuphar). Here is some information about both these possibilities:

https://blog-fruit-vegetable-ipm.extension.umn.edu/2024/08/apple-curculio-lesser-known-orchard-pest.html

https://cals.cornell.edu/integrated-pest-management/outreach-education/fact-sheets/plum-curculio-conotrachelus-nenuphar-fruit-fact-sheet

Image 8192 (Zestar):

1). I suspect this is fruit on the same tree that was pictured in image 8191. This again looks like apple scab. See the sites that I mentioned for image 8191.

Image 8816 (Honeycrisp):

1). I believe these apples are showing signs of sooty blotch and flyspeck complex. These are two different diseases caused by several fungi that commonly occur together on the same fruit. Neither disease damages the fruit. The discoloration is superficial and can commonly be wiped off. See the following for further information:

https://extension.umn.edu/plant-diseases/sooty-blotch-and-flyspeck

https://www.givinggrove.org/sooty-blotch-fly-speck

https://mnhardy.umn.edu/honeycrisp

https://hort.extension.wisc.edu/articles/apple-disorder-sooty-blotch-and-flyspeck/

I apologize for all this information. It is probably overwhelming! From bitter experience I have learned that diagnoses of plant diseases from just pictures are very problematic. I have also learned that trying to treat plant diseases without having positive identifications of the diseases can be a waste of time and money. Consider the following steps in moving forward:

1). Excellent plant disease diagnostic clinics exist at the University of Minnesota and the University of Wisconsin. I would suggest that you contact either or both via phone. Describe your situation and relay to them the disease possibilities that I’ve suggested. Inquire as to what type of plant samples they would need to provide definitive diagnoses. Ask about costs involved. See:

https://pdc.umn.edu/

https://pddc.wisc.edu/clinic-overview/

2). At the first signs of leaf emergence on your trees have a licensed professional arborist make an onsite inspection and assessment. Again, relay to him/her the disease possibilities that I have given you. See:

https://extension.umn.edu/planting-and-growing-guides/how-hire-tree-care-professional

Good luck. Please get back to us if you have further questions. Thanks for consulting us.