5-day old		10-day old

COLONIES with a fast growing, loosely cotton, white (4A1) to pale yellow (4A3) aerial mycelium and an orange white (5A2) to pale orange (5A3) substrate mycelium, ca. 8.0 cm diam when 5-day old and covering the whole area of potato dextrose agar (PDA) of a diameter of 10 cm when 10-day old and grown at a room temperature; with a red (9A6) to deep red (10C8) reverse and a distinctive peachy odour in 10-day old PDA culture.

CONIDIOPHORES (cp) usually many times branched, usually not in sporodochia, with phialides.

Phialides (p) short and broadly ended, non-proliferating, 6-18 x 3 µm.

CONIDIA of two types: micro- and macroconidia.

Microconidia (mc) globose, broadly ellipsoidal, pyriform or tear-shaped, 0-1-septate, 6-10 x 5.5-7.5 µm.

Macroconidia not observed.

SUBSTRATE AND DISTRIBUTION. Fusarium poae commonly occurs on different living poaceaous and herbaceous plant species and their debris (Blaszkowski 1994a-c, 1995; Brooks 1953; Domsch et al. 1980). Additionally, it has been isolated from rhizosphere soils of different cultivated and uncultivated plants (Domsch et al. 1980). Fusarium poae has frequently been encountered in seeds of different cereals (Blaszkowski 1994a, b; Neergaard 1977).

Although the fungus is distributed in the whole world, it prefers temperate regions (Domsch et al. 1980).

NOTES. Fusarium poae causes the silver-top disease of the inflorescens of some grasses, e. g., Dactylis glomerata L. and Poa pratensis L., as well as cereals, usually in association with the mite Pediculopsis gramineum (Brooks 1953; Smith et al. 1988). This fungus also affected seedlings of Triticum aestivum L. (Lacicowa 1963). According to Holliday (1989), F. poae is a weak pathogen.

Fusarium poae produces the mycotoxins neosolaniol, T-2, H-2, and acetyl T-2 toxins (Domsch et 1980).

REFERENCES

Blaszkowski J. 1994. The occurrence of Septoria nodorum Berk. and associated mycoflora in seeds of wheat cultivated in the Szczecin voivodeship. Acta Mycol. 29, 43-52.

Blaszkowski J. 1994. The influence of foliar fungicides on the mycoflora of seeds of Triticum aestivum. Acta Mycol. 29, 141-145.

Blaszkowski J. 1994. The influence of fungicides on the mycoflora of leaves of Triticum aestivum L. Acta Mycol. 29, 147-157.

Blaszkowski J. 1995. Effects of foliar fungicides on the mycoflora of glumes of Triticum aestivum. Acta Mycol. 30, 41-48.

Brooks F. T. 1953. Plant diseases. Geoffrey Cumberlege. Oxford University Press. London, new York, Toronto.

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.

Lacicowa B. 1963. Badania nad morfologia i biologia Fusarium poae (Pk.) Wr. oraz patogenicznoscia tego gatunku wzgledem siewek pszenicy. Ann. Univ. Mariae Curie-Sklodowska 18, 419-439.

Neergaard P. 1977. Seed pathology. The Macmillan Press Ltd. London.

Smith I. M., Dunez J., Lelliott R. A., Phillips D. H., Archer S. A. 1988. European handbook of plant diseases. Blackwell Scientific Publications.