Blossom Blight on Apples
I've been thinking about why I have such a sparse crop on some of my apple trees and when examining some of the low-fruitset trees, I see wilted blossom clusters. Could this be fireblight? I haven't seen any wilting or dying foliage, which I see in the identification pictures online.
Is my best course of action to remove the wilted blossom clusters? Should I remove the whole fruit-spur, just the tip, or just the wilted part?
Here's a 4th year Red Boskoop (a sport of Belle de Boskoop). From what I see online for BdB, it is extremely fireblight resistant yet it was one of the worst hit trees. The other thought I had is that conditions during bloom were cold and rainy and the tree aborted the blossoms.