Blueberry leave damage
Anyone recognize this leaf damage on a Jersey blueberry and have suggestions of a remedy? This is one of 5 Jersey in a row and the only one showing significant damage. The little black beetle is the first insect I've seen on the plant so far. It was bare root last spring and has grown well along with the rest of the plants.
Soil pH was 4.2 from the extension office with low magnesium. (See my other post a few weeks about epsom salts, etc.)