Pathogenicity of Biscogniauxia mediterranea (De. Not. Kunze.) to Quercus seedlings
Keywords:
Biscognauxia mediterranea, Quercus suber, Quercus ilex, pathogenicity, seedlings.Abstract
Introduction: The fungus Biscogniauxia mediterranea (syn.: Hypoxylon mediterraneum) is one of the most
dreaded pathogens on trees of the genus Quercus throughout the Mediterranean basin.The present work aims to
study in vivo the pathogenicity of two isolates of B. mediterranea from symptomatic trees of the cork oak of the
two forests of western Algeria.
Methods: The pathogenicity of the isolates was tested on young seedlings of Q. suber and Q. ilex aged one year,
by inoculation method, under controlled conditions (T° ~ 19 to 24 °C).
Results: After 30 days of inoculation, the two isolates confirmed their pathogenicity towards cork oak and holm
oak seedlings causing necrotic lesions on the stem reaching up to 45 mm in certain seedlings. Drying and
chlorosis of the leaves are also observed.
Conclusion: Given the potential threat posed by the inherent aggressiveness of Biscogniauxia species, further
research is deemed necessary to curb the development of charcoal disease on oak trees.
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