Une méthode simple de recherche de Ceratocystis fimbriata f. platani sur arbre en place

A simple method of diagnosing Ceratocystis fimbriata f. platani in standing trees. Bluish or purple streaks are found at the margins of lesions caused by Ceratocystis fimbriata f. platani. These contain the fungus systematically. Cores may be taken with an augur from any such streaks, the core then being cut into discs which are kept in a humid chamber at 20–25°C. C. fimbriata, if present, produces diagnostic endo-conidia after 2–4 days of incubation in 50–90 % of the samples.