Citrus Tree Diseases Greasy Spot Greasy spot is a fungus, known as Mycosphaerella citri, that affects the leaves of citrus trees and thrives in tropical and subtropical climates. The fungus appears as yellow, dark brown, or black lesions that initially occur on the underside of mature citrus leaves. As the fungus develops, the spots become… Read more »
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Citrus Tree Gardening Guide
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