Tubakia dryina, symptoms and pathogenicity to Quercus robur

Abstract

In 1999 disease symptoms on leaves of <em>Quercus robur</em> – necrosis, deformation and blackening of leaf petiole, followed by premature leaf fall were observed. <em>Tubakia dryina</em> was isolated from necrotic tissues and its pathogenicity to oak proved in infection experiments. The fungus caused necrosis of shoots and leaves. Dying leaves displayed also blackening of leaf petiole.