Strawberry pests and diseases: how to recognise them
Fragaria ananassa
The pests, diseases and disorders recorded for strawberry 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 | 12 |
|---|---|
| Pests | 5 |
| Diseases | 6 |
| Nutrient deficiencies | 1 |
| Need quick action | 3 |
Pests
Chafer grubsPotatoes, beetroot and other root crops have large, shallow, round holes.Photo: Сарапулов, CC BY 4.0, Wikimedia Commons
Strawberry blossom weevilFlower buds hang on a partly severed stalk, wither and drop without opening; the female lays an egg in the bud and then gnaws the stalk.Photo: James K. Lindsey, CC BY-SA 3.0, Wikimedia Commons
Two-spotted spider miteFine silk webbing over leaves and shoot tips in heavy attacks.Also called: red spider mitePhoto: Gilles San Martin from Namur, Belgium, CC BY-SA 2.0, Wikimedia CommonsVine weevilGrubs also bore into cyclamen and begonia tubers and into the stem bases of cacti and succulents.Also called: black vine weevilPhoto: Opuntia, CC BY-SA 3.0, Wikimedia Commons
WhiteflySticky honeydew on leaves, stems and fruit, followed by black sooty mould.Photo: gaucho, CC BY-SA 3.0, Wikimedia Commons
Diseases
Fusarium wiltA cut stem shows brown or reddish-brown water-conducting tissue — lines lengthways, dots or a ring in cross-section.Photo: Schlaghecken Josef, CC BY-SA 4.0, Wikimedia Commons
Grey mouldOn strawberries, grapes and other soft fruit a soft brown rot, often as the fruit ripens; on gooseberries whole branches die.Photo: Schlaghecken Josef, CC BY 4.0, Wikimedia Commons
White mould (Sclerotinia)Later, hard black seed-like bodies (sclerotia) 0.5–1 cm across in the mould and inside hollow stems.Photo: Schlaghecken Josef, CC BY-SA 4.0, Wikimedia Commons
AnthracnoseSunken brown or black lesions on stems, leaf stalks and bean pods; on lupins the leaf stalks twist like a corkscrew.Photo: Clemson University - USDA Cooperative Extension Slide Series, Public domain, Wikimedia Commons
Strawberry leaf spotSmall round dark-purple spots on the upper side of the leaves.Photo: Michal Maňas, CC BY 2.5, Wikimedia Commons
Verticillium wiltOn raspberries and blackberries the fruiting canes can turn bluish-black and die as the fruit ripens.Photo: Howard F. Schwartz, Colorado State University, Bugwood.org, CC BY 3.0 us, Wikimedia Commons
Nutrient deficiencies
Which strawberry problems need quick action?
These spread or do lasting harm fast; check the plants and start treatment the day you see them.
- Fusarium wilt: White, pink or orange fungal growth may appear on dead stems in wet weather; the whole plant usually dies.
- Grey mould: Small black seed-like bodies may form on the infected material.
- White mould (Sclerotinia): Roots, heads, pods and fruit can rot too, also in storage.
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.
- njaes.rutgers.edu/pubs/download.php?strPubID=FS293
- en.wikipedia.org/wiki/Cockchafer
- projectblue.blob.core.windows.net/media/Default/Horticulture/Publications/Strawberry bloss
- ages.at/en/plant/plant-health/pests-from-a-to-z/strawberry-blossom-weevil
- ru.wikipedia.org/wiki/Цветоед_малинный
- rhs.org.uk/biodiversity/glasshouse-red-spider-mite
- ipm.ucanr.edu/PMG/PESTNOTES/pn7405.html
- rhs.org.uk/biodiversity/vine-weevil
- ipm.ucanr.edu/PMG/GARDEN/PLANTS/INVERT/blvinwee.html
- ipm.ucanr.edu/agriculture/strawberry/whiteflies/
- ipm.ucanr.edu/agriculture/strawberry/fusarium-wilt/
- rhs.org.uk/disease/grey-mould
- ipm.ucanr.edu/PMG/GARDEN/PLANTS/DISEASES/botrytis.html
- pnwhandbooks.org/plantdisease/pathogen-articles/common/fungi/plants-susceptible-sclerotini
- plantpathology.mgcafe.uky.edu/files/ppfs-vg-29.pdf
- blogs.cornell.edu/livegpath/gallery/tomato/anthracnose-on-tomatoes/
- content.ces.ncsu.edu/anthracnose-of-pepper
- gd.eppo.int/taxon/MYCOFR
- ipm.ucanr.edu/PMG/GARDEN/FRUIT/DISEASE/strleafspot.html
- ipm.ucanr.edu/agriculture/strawberry/verticillium-wilt/
- rhs.org.uk/prevention-protection/nutrient-deficiencies
- en.wikipedia.org/wiki/Boron_deficiency_(plant_disorder)