Citrus Melanose is a common fungal disease affecting citrus trees, caused by Diaporthe citri (formerly Phomopsis citri).
| Aspect | Description |
|---|---|
| Causal Agent | Diaporthe citri (fungus) |
| Hosts | Citrus species (orange, grapefruit, lemon, mandarin) |
| Symptoms | Small, dark brown to black, raised lesions on leaves, twigs, and fruit; lesions often have a characteristic āpitā or āscabbyā appearance. |
| Impact | Causes cosmetic damage to fruit, reducing marketability; severe infections may cause twig dieback and reduced yield. |
Leaves: Tiny black spots, sometimes surrounded by yellow halos.
Twigs: Rough, scabby lesions leading to twig dieback.
Fruit: Raised, dark lesions that coalesce, causing scabby fruit rind.
Infection worsens during wet, humid conditions.
Fungus survives on dead twigs and leaf litter.
Spores spread by rain splash.
Infection occurs mainly during rainy periods, especially in spring and summer.
| Approach | Recommendations |
|---|---|
| Cultural | Prune to improve air circulation; remove dead wood and leaf litter; avoid overhead irrigation. |
| Chemical | Apply copper-based fungicides during vulnerable periods (pre-bloom and early fruit development). |
| Resistant Varieties | No widely resistant varieties, but good cultural practices reduce severity. |
While citrus melanose rarely causes fruit loss due to rot, the cosmetic damage can reduce fruit market value significantly, especially for fresh-market fruit.
Ā
Diaporthe citriĀ is aĀ plant pathogenĀ infectingĀ citruses.[2]
Ā
This article uses material from the Wikipedia articleĀ "Diaporthe citri", which is released under theĀ Creative Commons Attribution-Share-Alike License 3.0. Content may have been omitted from the original, but no content has been changed or extended.
Ā
| Diaporthe citri |
Citrus Melanose is a common fungal disease affecting citrus trees, caused by Diaporthe citri (formerly Phomopsis citri).
| Aspect | Description |
|---|---|
| Causal Agent | Diaporthe citri (fungus) |
| Hosts | Citrus species (orange, grapefruit, lemon, mandarin) |
| Symptoms | Small, dark brown to black, raised lesions on leaves, twigs, and fruit; lesions often have a characteristic āpitā or āscabbyā appearance. |
| Impact | Causes cosmetic damage to fruit, reducing marketability; severe infections may cause twig dieback and reduced yield. |
Leaves: Tiny black spots, sometimes surrounded by yellow halos.
Twigs: Rough, scabby lesions leading to twig dieback.
Fruit: Raised, dark lesions that coalesce, causing scabby fruit rind.
Infection worsens during wet, humid conditions.
Fungus survives on dead twigs and leaf litter.
Spores spread by rain splash.
Infection occurs mainly during rainy periods, especially in spring and summer.
| Approach | Recommendations |
|---|---|
| Cultural | Prune to improve air circulation; remove dead wood and leaf litter; avoid overhead irrigation. |
| Chemical | Apply copper-based fungicides during vulnerable periods (pre-bloom and early fruit development). |
| Resistant Varieties | No widely resistant varieties, but good cultural practices reduce severity. |
While citrus melanose rarely causes fruit loss due to rot, the cosmetic damage can reduce fruit market value significantly, especially for fresh-market fruit.
Ā
Diaporthe citriĀ is aĀ plant pathogenĀ infectingĀ citruses.[2]
Ā
This article uses material from the Wikipedia articleĀ "Diaporthe citri", which is released under theĀ Creative Commons Attribution-Share-Alike License 3.0. Content may have been omitted from the original, but no content has been changed or extended.
Ā
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