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Insect & Disease Resource Center

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  • Algal Leaf Spot of Magnolia
    Algal Leaf Spot of Magnolia

    Raised, wavy, cushion-like spots are symptoms of algal leaf spot, also known as green scurf. The spots are greenish, pinkish or grayish and less than 1 cm. in diameter. They may encircle a twig, creating a girdling canker.