COLONIES rather fast growing, ca. 8-10 cm diam after 10-day growth at 20oC on potato dextrose agar (PDA), pinkish, concentrically zoned, powdery because of the abundant sporulation.

CONIDIOPHORES (cp) erect, up to 2 mm long, 4-5 µm wide, frequently with three septa in the lower part.

CONIDIA (c) ellipsoidal to pyriform, with a prominent truncate basal scar, 2-celld, hyaline, smooth, thick-walled, 12-23(-35) x 8-10(-13) µm; the upper cell is slightly larger than the under one.

SUBSTRATE AND DISTRIBUTION. Trichothecium roseum commonly occurs on decaying plant substrates and macromycete sporocarps (Domsch et al. 1980). It also is a destructive mycoparasite (Cook and Baker 1983).

Trichothecium roseum has a worldwide distribution (Domsch et al. 1980).

NOTES. Trichothecium roseum causes pink mould of stored apples (Holliday 1989) and tomatoes in a greenhouse (Domsch et al. 1980).

REFERENCES

Agrios 1988. Plant pathology, 3rd edition, Academic Press, INC. San Diego, New York, Berkeley, Boston, London, Sydney, Tokyo, Toronto.

Cook R. J., Baker K. F. 1983. The nature and practice of biological control of plant pathogens. The American Phytopathological Society. St. Paul, Minnesota.

Domsch K. H., Gams W., Anderson T. 1980. Compendium of soil fungi. Acad. Press. London-New York-Toronto-Sydney-San Francisco.

Holliday P. 1989. A dictionary of plant pathology. Cambridge University Press. Cambridge, New York, New Rochelle, Melbourne, Sydney.