Scorch
The blueberry
12 host plants · Fungal
Last updated
This profile synthesizes data from multiple published sources. Expert field review is in progress.
Scorch appears as browning of leaf margins and tips on affected plants. Ensure consistent watering, especially during establishment. Avoid excessive fertilizer which can promote this condition. Provide afternoon shade in hot climates. This stress condition often resolves with improved care. Scorch problems increase during hot, dry periods or with newly planted trees. Consistent watering and mulching help prevent damage Early detection and prompt management of symptoms help limit disease spread.
When the disease is first suspected, have plants tested to confirm the presence of this specific virus. Do not wait until the following year to see if symptoms reoccur before testing, delaying control measures will increase the number of plants that will need to be removed.
Quick Reference
Management
Late season (August-September); drought or salt stress conditions.
Variable by causal organism; often abiotic (drought, salt) or secondary fungal colonization of stressed foliage.
Cultural Controls
- It is important to monitor and keep a record of soil pH on a yearly basis and take corrective actions if necessary. Plant hydrangeas at the end of blueberry rows to monitor soil pH. Many cultivars have blue flowers when soils are in the correct pH range. Flowers turn purple to pink as the pH increases beyond the optimum range for blueberries. Avoid white cultivars or ones that are bred to be pink