Citrus Scab
- Caused by the fungus Elsinoe fawcettii
- Found on fruit, leaves and twigs
- Deforms leaves
- Wart like symptoms
- Light tan in color
- Affects grapefruit, Temples, Murcotts, tangelos, and some other tangerine hybrids
Additional Information
- Florida Citrus Pest Management Guide: Citrus Scab PDF
- A Guide to Citrus Disease Identification PDF
- Your Florida Dooryard Citrus Guide - Common Pests, Diseases, and Disorders of Dooryard Citrus PDF
- Citrus Scab PDF
- Quick Reference Guide to Foliar Fungicides PDF
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Citrus Melanose
- Caused by the fungus Diaporthe citri
- Found on fruit and leaves
- Feels like sandpaper
- Red-brown in color
- Grapefruit is very susceptible but all citrus may be affected
Additional Information
- Florida Citrus Pest Management Guide: Melanose PDF
- A Guide to Citrus Disease Identification PDF
- Your Florida Dooryard Citrus Guide - Common Pests, Diseases, and Disorders of Dooryard Citrus PDF
- Melanose PDF
- Quick Reference Guide to Foliar Fungicides PDF
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Alternaria Brown Spot
- Caused by the fungus Alternaria alternata
- Found on young fruit, leaves and twigs
- Brown to black spots surrounded by a yellow halo
- Affects Dancy tangerines, Minneola tangelos, Murcotts, Orlando tangelo, Nova tangelo, Lee tangelo and Sunburst tangerine
- Does not affect oranges; may affect grapefruit if located next to highly infected tangelos or tangerines
Additional Information
- Florida Citrus Pest Management Guide: Alternaria Brown Spot PDF
- Alternaria Brown Spot PDF
- Quick Reference Guide to Foliar Fungicides PDF
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Citrus Bacterial Spot (CBS)
- Caused by bacterium Xanthomonas axonopodis pv. citrumelo
- Occurs in nursersies
- Does not survive in commercial groves
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Anthracnose
- Caused by the fungus Colletotrichum gloeosporioides
- Primarily affects fruit
- Tangerines are especially susceptible
- Occurs primarily as a postharvest disease
Additional Information
- Anthracnose PDF
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Greasy Spot
- Caused by the fungus Mycosphaerella citri
- Looks like drops of oil
- Can be found on fruit or leaves
- Most severe on grapefruit leaves, Pineapple oranges, Hamlins and tangelos
Additional Information
- Florida Pest Management Guide: Greasy Spot PDF
- Greasy Spot PDF
- A Guide to Citrus Disease Identification PDF
- Your Florida Dooryard Citrus Guide - Common Pests, Diseases, and Disorders of Dooryard Citrus PDF
- Quick Reference Guide to Foliar Fungicides PDF
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