Troubleshooting
Bartlett pear problems — and how to fix them
Bartlett pear (Pyrus communis 'Bartlett') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Fire blight (Erwinia amylovora)
Bartlett is among the most fire-blight-susceptible pear cultivars. Rapid shoot blackening and dieback occur during warm, wet spring weather. Prune infected wood well below visible symptoms with sterilized tools; apply copper bactericide at bloom; avoid excess nitrogen and overhead irrigation.
Pear psylla (Cacopsylla pyricola)
Small, sap-sucking insect producing honeydew and black sooty mold; reduces fruit quality and tree vigor. Monitor for nymphs in spring; apply horticultural oil at delayed dormant stage. Encourage beneficial predators; avoid broad-spectrum insecticides that kill natural enemies.
Post-harvest senescence
Bartlett flesh quickly turns mealy if left on the tree too long or not cold-conditioned correctly. Harvest when the background skin turns from green to yellow-green and the fruit releases with gentle upward pressure. Ripen at 18–21°C (65–70°F) for 5–10 days after a brief cold period.
Prevent bartlett pear problems before they start
Most bartlett pear issues are care-mismatch, not bad luck. Dial in the basics:
- Common european pear problems — the species this cultivar belongs to
- Common bartlett pear problems — our other guide for the same plant
- What's wrong with my plant? — the diagnosis apps compared
- Bartlett pear watering schedule
- Bartlett pear light requirements
- Best soil mix for bartlett pear
- Bartlett pear temperature & humidity
- Full bartlett pear care guide
Looking for bartlett pear in general rather than its problems? Read the full bartlett pear care guide — light, water, soil and feeding.
Bartlett pear problems — FAQ
Why is my bartlett pear fire blight (erwinia amylovora)?
Bartlett is among the most fire-blight-susceptible pear cultivars. Rapid shoot blackening and dieback occur during warm, wet spring weather. Prune infected wood well below visible symptoms with sterilized tools; apply copper bactericide at bloom; avoid excess nitrogen and overhead irrigation.
Why is my bartlett pear pear psylla (cacopsylla pyricola)?
Small, sap-sucking insect producing honeydew and black sooty mold; reduces fruit quality and tree vigor. Monitor for nymphs in spring; apply horticultural oil at delayed dormant stage. Encourage beneficial predators; avoid broad-spectrum insecticides that kill natural enemies.
Why is my bartlett pear post-harvest senescence?
Bartlett flesh quickly turns mealy if left on the tree too long or not cold-conditioned correctly. Harvest when the background skin turns from green to yellow-green and the fruit releases with gentle upward pressure. Ripen at 18–21°C (65–70°F) for 5–10 days after a brief cold period.