Fruit Rot and Cane Botrytis

Gray mold develops on raspberry fruit at harvest, and you see watermark lesions on canes in late summer. Botrytis cinerea drives wet-weather losses exceeding 50% during bloom and harvest. Manage by improving canopy air circulation, pruning to reduce density, minimizing nitrogen, and harvesting in cool morning hours. Select resistant cultivars like Munger or Meeker.

No single cultural practice provides adequate management of gray mold under highly conducive conditions. Integrate several tactics to manage this disease.