Can't identify pest or disease on pear tree- any ideas?
I've had a recurring problem on a conference pear tree. The tree is probably around 5 years old A lot of holes with black edges start appearing in the leaves around blossom time, and there are lots of little black "bits" on the leaves. It tends to get worse over a few weeks, and any fruitlets that form eventually fall off.
Could anyone help identify what the possible cause may be? I've tried searching for answers online for countless hours but to no avail.