Friesia X, 4-5
Friesia X, 4-5
Friesia X, 4-5
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- 263-<br />
brown, 78-182 u . Pycnospores cylindrical, rounded at the ends, hyaline,<br />
1-3 (usually 3) septa, 17-28 X 2.8-4.0 u . Perithecia subepidermal,<br />
globose, with a short papillate ostiole, dark brown to black, 100-240,u<br />
in diameter. Asci cylindrical to clavate, bitunicate, 8-spor ed, 51-80 X<br />
9-12 u , Ascospores biseriately arranged, straight or slightly curved,<br />
3-sept at e, constricted at the septa, often with the second cell from<br />
apex somewhat enlarged, light brown, 19-28 X 4.4-5.6 u ,<br />
Imperfect stage: Septo ria nodorum (BERK.) BERK. & BR. f. sp .<br />
hordei f. sp. nov.<br />
Type specimens have been deposited in the Herbarium of the<br />
Department of Plant Pathology, The Royal Veterinary and Agricultural<br />
University, Copenhagen, and at the Centraalbureau voor<br />
Schimmelcultures, Baarn, Holland.<br />
The formation of t he new infraspecific taxon Leptosphaeria nodorum<br />
MULLER f. sp. hordei requires (International Code of Botanical<br />
Nomenelat ure 1966, art 25 and 26) that Leptosphaeria nodorum<br />
MULLER which eauses glume blotch of wheat is also given the taxonomic<br />
rank of a [orma specialis as follows:<br />
Leptosphaeria nodorum MULLER f. sp. nodorum. Imperfect stage:<br />
Septoria nodorum (BERK.) BERK. & BR. f. sp. nodorum. The nomenclatural<br />
type of this fungus is Leptosphaeria nodorum MULLER.<br />
ACKNOWLEDGEMENTS<br />
The author wishes to thank Professor E. HELLMERS, head of Department<br />
of Plant Pathology, for vaulable criticism of the manuscript, and is<br />
also indebted to Civil Engineer E. BROCKMEYER for the Latin translation<br />
of the diagnosis of L eptosphaer ia no dorum f. sp. hordei.<br />
The investigations were supported by the Danish Agricultural and<br />
Veterinary Research CounciL<br />
REFERENCES<br />
Berkeley, M. J. (1845): Disease in the wheat crop. - Gard. Chron.: 60l.<br />
& C. E. Broorne (1850): Notices of British Fungi. - Ann. Mag.<br />
Nat. Hist., 2. Ser., 5: 365-380.<br />
Boererna, G. H., H. A. van Kesteren & M. M. J. Dorenbosch (1964): Nieuwe<br />
af bijzondere schimmelaantastingen. - Jaarb. VersL Meded.<br />
Pl.ziektenk. Dienst. 142: 64-66.<br />
C.M.I. (1954): Distribution maps of plant diseases, no. 283 .