Blackcurrant pests and diseases: how to recognise them
Ribes nigrum
The pests, diseases and disorders recorded for blackcurrant in our library, each with a photo and its first symptom. Every page has the full list of symptoms, organic and chemical treatment and prevention.
At a glance
| Problems in total | 5 |
|---|---|
| Pests | 3 |
| Diseases | 2 |
| Need quick action | 1 |
Pests
Big bud miteIn late winter some buds are abnormally swollen and round, like tiny cabbages, instead of slim and pointed.Photo: jensu, CC0, Wikimedia Commons
Scale insectsSticky honeydew on leaves or on surfaces below the plant, often with black sooty mould.Photo: BARAKAT2011, CC BY-SA 3.0, Wikimedia CommonsVine weevilPlants wilt and die from autumn to spring because the grubs have eaten the roots; plants in pots suffer most.Also called: black vine weevilPhoto: Opuntia, CC BY-SA 3.0, Wikimedia Commons
Diseases
Honey fungusPeel back the bark at the base — a creamy-white, paper-thin sheet of fungus between bark and wood that smells strongly of mushrooms confirms it; the bark at the base may crack and bleed.Photo: Stu's Images, CC BY-SA 3.0, Wikimedia Commons
RustPustules are orange, yellow, brown, black or white depending on the rust; many turn dark in late summer and autumn.Photo: Rasbak, CC BY-SA 3.0, Wikimedia Commons
Which blackcurrant problems need quick action?
These spread or do lasting harm fast; check the plants and start treatment the day you see them.
- Honey fungus: Black or brown root-like cords ("bootlaces") on the roots and in the soil, mostly in the top 15 cm.
Plants with many of the same problems
Which plants each problem affects: sources
The links between these problems and the plant were checked against these pages.
- rhs.org.uk/biodiversity/blackcurrant-big-bud-mite
- en.wikipedia.org/wiki/Cecidophyopsis_ribis
- extension.umd.edu/resource/scale-insects-indoor-plants
- ipm.ucanr.edu/PMG/PESTNOTES/pn7408.html
- rhs.org.uk/biodiversity/vine-weevil
- ipm.ucanr.edu/PMG/GARDEN/PLANTS/INVERT/blvinwee.html
- rhs.org.uk/disease/honey-fungus
- rhs.org.uk/advice/pdfs/honey-fungus-host-list.pdf
- pnwhandbooks.org/plantdisease/host-disease/gooseberry-currant-ribes-spp-blister-rust