You will use 1/4 cup of Bayer Advanced 12 Month Tree and Shrub Protect and Feed II Granules per inch of distance around the trunk.
Yes, Bayer Advanced 12 Month Tree and Shrub Protect and Feed II Granules are labeled to protect against Japanese beetles.
We are not aware of this type of issue with applications of Bayer Advanced 12 Month Tree and Shrub Protect and Feed II. You may try reaching out to the manufacturer to confirm if this is a known issue, they can be reached at 1-877-229-3724.