In This Section |
Distinguishing Common Fruit Diseases of Strawberry
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| Symptoms | Firm round lesions, slightly sunken, initially orange or tan in colour. These lesions turn brown, then black with age and produce salmon-coloured spore masses |
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| Source of disease | Rain-splashed spores from infected plants, fruit mummies, or recently contaminated soil. Spores can also spread by movement of workers, animals and equipment. |
| Factors that favour disease | Warm, humid weather, splashing rain, plasticulture. |
| Control | Avoid excessive N. Use disease-free planting stock.
Apply Cabrio EG fungicide at bloom and/or before harvest. Sanitation. |
Symptoms |
Brown lesions form at calyx end of fruit and produce grey-white fungal growth. The lesions have no distinct border. They produce powdery spores that are easily airborne |
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Source of disease |
Airborne spores from plant debris and old strawberry leaves. |
Factors that favour disease |
Moderate temperatures and long wetting periods or periods of high humidity, during bloom. Dense foliage and wide rows that keep plants wet longer. |
Control |
Avoid excessive N. Apply fungicides during bloom, Rovral, Elevate 50 WDG , Supra Captan 80 WDG, Maestro 80 DF, Folpan 80 WDG, Ronilan EG, Lance WDG, Scala SC |
| Symptoms | Fruit surface is dull, discoloured and may be tough and leathery. The vascular tissue to the seeds is discoloured. Infected fruit has a foul odour and taste |
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| Source of disease | Soil-borne spores that travel in surface water and saturated soil. Spores contact fruit in rain-splash, standing water or soil to fruit contact. |
| Factors that favour disease | Saturated soil conditions, standing water, soil-fruit contact. Conditions that favour Botrytis will also favour leather rot |
| Control | Be sure straw mulch prevents contact of fruit with soil and rain splashed soil. |
See OMAFRA Publication #360, Fruit Production Recommendations disease control recommendations.
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