Problem with Honeycrisp aplle tree and fruit

Asked September 6, 2020, 6:36 PM EDT

Hi, I was wondering if you could help me identify the problem with my honeycrisp tree. The growing year went well until a couple of weeks ago. The leaves started turning brown and the fruit have dimples in them. Most appear to not have bugs in them. I also have a Fuji & Liberty apple trees. They do not have the problem Can you tell what is wrong and how do I prevent it next year? Thanks for the help.

Livingston County Michigan

1 Response

Honeycrisp leaves develop light colored zones due to build up of a storage sugar. This is not harmful to the tree. The brown patches may be due to the apple flea weevil, seen mainly in trees with little spray coverage.

https://www.canr.msu.edu/news/apple_flea_weevils_detected_in_organic_apple_orchard_in_northwest_michigan#:~:text=Adult%20apple%20flea%20weevils.&text=Since%20then%2C%20damage%20has%20been,laying%20eggs%20in%20the%20spring.

The dimples in the fruit are usually due to one or more plant bugs (tarnished, stink bug) feeding--they stick a slender mouthpart through the apple skin and suck out contents. Another possibility is apple maggot. For this pest you may see very tiny trails in the fruit.

See the following link for general information:

https://williamshane.weebly.com/uploads/2/7/0/7/27077603/apple_spray_for_backyard_gardeners.pdf