Long-Spored Asian Rubus rust-Hamaspora longissima

This rust fungus attacks a number of Rubus species native to Asia including Rubus niveus. This plant is cultivated for its edible fruits in Asia and Africa and is considered a noxious weed in North America.

Hamaspora longissima Korn., 1877

Spermogonia and aecia unknown.

Uredinia hypophyllous (on lower side of leaves), sparse or aggregated, minute, yellow; seated on pallid spots, 0.5-1.0 mm diam; paraphyses curved, hyaline, 40-60 × 12-17 µm; urediniospores globose, subglobose or ellipsoid, yellow, 18-30 × 18-28 µm, wall 1-2 µm thick, acutely verrucose, without distinct germ pores.

Telia amphigenous (on upper and lower side of leaves), cespitose, filiform, pale yellow, up to 4 mm; teliospores obclavate to acicular, hyaline, 1-3 septate, mostly 2 septate, 57-180 × 13-23 µm long, apical cell 8 × 2.5 µm.

See Gjaerum (1985), Monoson (1969) and Ragunathan & Ramakrishnan (1973) for a more detailed description.

Host range: Uredinial and telial stage: Rubus australis G. Forst. Rubus ellipticus Sm. Rubus friesiorum Gust. Rubus lambertianus Ser. Rubus ludwigii Eckl. & Zeyh. Rubus moluccanus L. Rubus niveus Thunb., cultivated in Asia, considered a noxious weed in North America Rubus pinnatus Willd. Rubus rigidus Sm. Rubus spp. Rubus steudneri Schweinf. Rubus taiwanianus Matsum. Rubus transvaliensis Gust. Rubus volkensii Engl. Rubus xanthoneurus Focke

Geographic distribution: Asia (China, India, Java, Taiwan) plus one report from Africa (Ethiopia, Gjaerum, 1985)

Ragunathan & Ramakrishnan (1973) described the size of urediniospores as 19-29 × 16-19 µm and teliospores as 83-254 × 13-16 µm. However these spore sizes do not matched those in Gjaerum (1985) and Monoson (1969).

References:

Anonymous 1979. List of plant diseases in Taiwan. Pl. Protect. Soc., Republ. of China, 404 pages.

Crous, P.W., Phillips, A.J.L., and Baxter, A.P. 2000. Phytopathogenic Fungi from South Africa. University of Stellenbosch, Department of Plant Pathology Press, 358 pages.

Doidge, E.M. 1950. The South African fungi and lichens to the end of 1945. Bothalia 5: 1-1094.

Ebbels, D.L., and Allen, D.J. 1979. A supplementary and annotated list of plant diseases, pathogens and associated fungi in Tanzania. Phytopathol. Pap. 22: 1-89.

Gjaerum, H.B. 1985. East African rusts (Uredinales), mainly from Uganda 4. On families belonging to Apetalae and Polypetalae. Mycotaxon 24: 237-273.

Hosagoudar, V.B. 1988. Uredinales of Kerala. J. Econ. Taxon. Bot. 12: 265-272.

McAlpine, D. 1906. The Rusts of Australia. Their Structure, Nature and Classification. Department of Agriculture, Victoria, 349 pages.

Monoson, H.L. 1969. The species of Hamaspora. Mycopathol. Mycol. Appl. 37: 263-272.

Wakefield, E.M., and Hansford, C.G. 1948-49. Contributions towards the fungus flora of Uganda. IX. The Uredinales of Uganda. Proc. Linn. Soc. London 161: 162-197.

Whiteside, J.O. 1966. A revised list of plant diseases in Rhodesia. Kirkia 5: 87-196.

Nomenclature

Specimens in BPI

Additional distribution data

Suggested citation: Yun, H.Y. Systematic Mycology and Microbiology Laboratory, ARS, USDA. . Invasive Fungi. Long-Spored Asian Rubus rust-Hamaspora longissima. Retrieved November 21, 2009, from http://nt.ars-grin.gov/sbmlweb/fungi/index.cfm .