Pear trees with black edges on leaves

[clarkinks]

@Fusion_power

Exactly my thought zinc / boron

Boron deficiency / Blossom Blast?

I’ve read a deficiency in boron can manifest itself in many ways. Blossom blast and other problems are said to be worse under those conditions. Anyone have experience with blossom blast or boron deficiencies? Those buds that do not have leaves I think are infected with blossom blast. This is the first time I’ve saw the disease outside of books. It greatly reduces fruit set I’m told. I used both copper and antibiotic this spring. This is an Asian pear that I grafted new wood to this spring. S…