Abstract

Abstract A description is provided for Ramularia bellunensis . Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Bud disease of pyrethrum ( Tanacetum cinerariifolium ) that affects those areas where it is grown as a crop (East Africa). On other hosts it causes stem and leaf lesions. HOSTS: Argyranthemum frutescens, Glebionis ( Chrysanthemum) segetum, Leucanthemum vulgare, Tanacetum cinerariifolium, T. coccineum, T. corymbosum, T. parthenium (BRAUN, 1998) ( Asteraceae ). GEOGRAPHICAL DISTRIBUTION: AFRICA: Ethiopia, Kenya, Tanzania, Zaire. ASIA: Republic of Georgia ( www.cybertruffle.org.uk/gruzmaps/index.htm ). AUSTRALASIA: New Zealand ( www.nzfungi.landcareresearch.co.nz ). EUROPE: Germany, Great Britain, Italy, Poland, Romania, Slovak Republic ( www.nt.ars-grin.gov/fungaldatabases ), Ukraine (Crimea). None reported. TRANSMISSION: Wind and rain-splash dispersal of conidia. The fungus on pyrethrum colonizes the involucral scales, fragments of which can be included with the seeds (NATTRASS, 1947).

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