Nine derivatives of pentachlorophenol have been prepared and tested for fungistatic activity against the mycelia ofBotrytis fabae, Sclerotinia laxaandStereum purpureumand for phytotoxicity towards tomato, apple and plum. The most fungitoxic of these compounds was the acetyl ester. Its phytotoxicity, although much less than that of pentachlorophenol itself, nevertheless precludes its effective use as an eradicant fungicide on foliage.