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.