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Anthracnose is a very common disease that attacks a very wide range of plants and trees. There are two ways Anthracnose disease can attack trees: 1) Spot Anthracnose that impacts tree leaves and blossoms, and; 2) the more harmful canker versions that disrupt a tree’s vascular system.
When Spot Anthracnose initially emerges, small light brown spots of dead tissue emerge on the leaves and blossoms in the late spring and summer. The spots develop during the cool, wet humid spring weather. Often the brown dieback is located along the leaf’s vein system.
The disease is caused by a fungus that over-winters on the bark of the tree or on fallen leaves. In the spring, the fungus is spread by rain and wind, which transports the fungus to newly developing healthy leaves and blossoms. When the tree is severely infected over several seasons the fungus will infect and kill branches.
Promote the overall health of the tree with regular proper fertilizing, using the TreeHelp Annual Care Kit. If a tree has been infected spray it with the Fruit Tree, Vegetable & Ornamental Fungicide, 1 Pint Concentrate. Repeat as necessary. To reduce or prevent reoccurrence the following year, in the fall, spray the tree and surrounding area with the Fruit Tree, Vegetable & Ornamental Fungicide, 1 Pint Concentrate to reduce the number of over-wintering spores. Also be sure to remove and destroy any fallen leaves.