Details of the fungistatic effect of Phialophora cinerescens. / Particularités de l'action fongistatique du Phialophora cinerescens

We have previously isolated two chlorinated antibiotics from Phialophora asteris and P. asteris f. sp. helianthi, vascular pathogens on plants. P. cinerescens, pathogen on carnation, also presents a fungitoxic activity but the nature of the antibiotic compound is still unknown. We point out that this activity can be lost by sectorial variations on the growing margin and that the antibiotic product shows a striking photolability.