The disease starts out as small white spots on leaf surfaces that enlarge as the disease.
25+ Fungal Leaf Spot Magnolia. The disease starts out as small white spots on leaf surfaces that enlarge as the disease. Fungi thrive in moist conditions.
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The cool wet weather has provided a good environment for anthracnose to grow. Over time, the spots may combine or enlarge to form blotches. Common fungi responsible for leaf spot diseases in midwestern shade and ornamental trees.
Chemical control important during early shoot growth for fungal leaf spots.
Individual leaves with spots can be picked off and destroyed. There are about 125 species, some of which are native to the united states. Bacterial leaf spots and blights can occur at the same time as fungal leaf spots and differentiation can sometimes be difficult between the two. Anthracnose discula fraxinea, on ash elsinoe corni, on dogwood gloesporium quercum, on oak andromeda, aucuba, begonia, boxwood, magnolia, maple, rhodedendron, snapdragon, zinnia.
