Storage Rots

Penicillium spp., Botrytis cinerea

4 host plants · Fungal

Last updated

You'll find blue mold, gray mold, bull's-eye rot, and other fungal decays on stored pears developing over weeks to months. Blue and gray mold account for majority of postharvest losses. Delays in cooling fruit increase risk. Cool rapidly, maintain low storage temperatures, and avoid high nitrogen in the orchard. Blue mold resistance to fungicides is increasing, making sanitation critical.

Reduce moisture around affected tissue by improving drainage and air circulation. Remove rotted material cleanly and dispose of it away from the planting area. Avoid wounding healthy tissue during cleanup, as fresh wounds create new entry points. If the problem keeps returning, evaluate whether the site is too wet or poorly drained for the species you are growing.

Quick Reference

Agent Type
fungal
Causal Agent
Penicillium spp., Botrytis cinerea
Host Plants
4
Favorable Conditions
Fungal colonization during growing season; expression during storage. Penicil...

Management

Vulnerability Window

Infection in field May-August; symptoms develop in storage (weeks-months after harvest).

What Triggers Infection

Fungal colonization during growing season; expression during storage. Penicillium optimal temps 0-5°C (32-41°F).

Host Plants (4)

Sources & References

Data Maturity
Baseline Extension data. Expert review underway.