Notes on Raspberry Diseases
Management practices to reduce diseases on raspberry
- Plant raspberries on well-drained sites with good air circulation.
- Plant new raspberries on 25-30 cm (10-12 in.) raised beds to
improve drainage and reduce the risk of phytophthora root rot.
This is especially important on sites with clay loams, water table
fluctuations or where susceptible varieties will be grown.
- Space rows at least 2.5 m apart. Limit width of plants within
rows to 30-45 cm. Thin excess canes in the row.
- Immediately after harvest is finished, prune out fruiting canes
and weak growth if cane diseases are a problem. However, if winter
injury is a problem, on susceptible varieties like Titan for example,
delay pruning until canes are fully dormant.
- Keep rows free from weeds.
- In spring, prune out and burn canes or portions of canes with
swelling, or scars and cracks.
- In the growing season, maintain a narrow row width by repeatedly
mowing small primocanes that grow into the row middles.
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