How to distinguish and assess Bacterial canker, Cherry leaf spot and Shot hole disease

Summary

This practice abstract explains how to distinguish between Bacterial canker (Pseudomonas spp.), Cherry leaf spot (Blumeriella jaapii), and Shot hole disease (Stigmina carpophila), three cherry diseases that frequently show overlapping symptoms, making field identification difficult. It provides a clear comparison of their pathogen types, life cycles, infection periods, spread mechanisms, and specific symptom patterns on leaves, fruits, and twigs. By understanding these differences, growers can diagnose problems more accurately, implement the right control measures, and identify tolerant varieties—while keeping in mind that only laboratory analysis can confirm the pathogen with certainty.