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Aug 17

Common Pest Problems - Anthracnose

Posted on August 17, 2018 at 12:32 PM by Colin Heyne


 Common Pest Problems - Anthracnose1.JPG
 Common Pest Problems - Anthracnose2.JPG
 The effects of Anthracnose on leaves
 The effects of Anthracnose on bark


Anthracnose is a foliar disease that originates from multiple species of fungi whose spores, when released, infect newly emerging leaves, causing dark, sunken lesions on leaves, stems, flowers, and fruit. The most common symptoms of anthracnose are tan to brown or black blotched areas on leaves which develop along the leaf veins. It most commonly impacts: ash, elm, maple, oak, sycamore, and walnut.

Anthracnose will attack developing shoots and expanding leaves
 and can be directly connected to extended wet conditions as the fungi thrive in prolonged spring rains when new growth is abundant. Management of this disease is possible through mindful selection for new plantings or with chemical applications. For more information on Anthracnose and possible treatment options visit the University of California IPM website.