Genus Cercospora in Thailand: Taxonomy and Phylogeny (with a ...

Plant Pathology & Quarantine
Fig. 51 – Line drawings of Cercospora althaeina on Alcea rosea. a. Conidiophores and stromata. b.
Conidia. Bars = 50 μm. (Meeboon 2009).
cells. Conidiophores 41–186 × 3–5 μm, up to 8
in dense fascicles, 3–7-septate, arising from
stomata, straight, sometime slightly constricted
at the septate, smooth, brown at the base, paler
toward the apex, cylindrical, unbranched, not
geniculate. Conidiogenous cells integrated,
holoblastic, often monoblastic, sometimes
polyblastic and sympodially proliferating.
Conidiogenous loci 2–3 μm diam., conspicuous,
thickened and darkened. Conidia 57–316 × 2–4
μm, solitary, acicular, straight, hyaline, 14–25septate,
smooth, truncate at the base, tapering
toward a subacute apex, hila 2–2.5 μm diam.,
conspicuous, thickened and darkened.
Specimen examined – THAILAND,
Chiang Rai Province, Mae Fah Luang, a. Mae
Jan, Doi Tung Development, on leaves of
Alcea rosea L. (Malvaceae), 16 August 2008,
Jamjan Meeboon (BBH 23585).
Hosts – Abutilon avicennae, A. incanum,
A. theophrastii, Alcea flavovirens, A. froloviana,
A. kusariensis, A. litwinowii, A. nudiflora,
A. pallida, A. rosea, A. rugosa, A. tabrisiana,
Alcea sp., Althaea ficifolia, A. hirsuta,
A. officinalis, A. rosea, Callirhoë involucrata,
C. triangulata, Gossypium hirsutum, Hibiscus
trionum, Hibiscus sp., Kydia calycina, Kydia
sp., Lavatera thuringiaca, Malva neglecta, M.
pusilla, M. rotundifolia, Malva sp., Modiola
caroliniana, Napaea dioica (Malvaceae)
(Crous & Braun, 2003).
Distribution – Worldwide, Argentina,
Armenia, Australia, Azerbaijan, Bangladesh,
Brazil, Bulgaria, Canada, China, Cuba, Georgia,
Germany, Guatemala, India, Iran, Italy,
Jamaica, Japan, Kazakhstan, Kenya, Kirghizia,
Korea, Lithuania, Malawi, Malaysia, Mauritius,
Moldova, Myanmar, New Zealand, Pakistan,
Romania, Russia (European part), Tadzhikistan,
Taiwan, Thailand, Ukraine, USA, Zambia,
Zimbabwe (Crous & Braun 2003, Meeboon
2009).
Notes – Cercospora althaeina was first
reported from Thailand by Meeboon (2009).
Literature – Chupp (1954, p. 369, 376).
Moraceae
Cercospora ficina Tharp, Mycologia 9: 109
(1917).
≡ Cercospora ficina (Tharp) Sacc., Syll.
Fung. 25: 911 (1931). Fig. 52
Leaf spots 15–30 mm diam., amphigenous,
circular or subcircular, at first pale
greenish to ochraceous, later brown to dark
brown, finally with greyish brown centre,
surrounded by a dark margin or brown halo.
Caespituli hypophyllous. Stromata 17–38 μm
diam., intraepidermal, well-developed, subglobose,
brown to blackish brown. Conidiophores
42–229 × 3–6 μm, numerous, in loose to
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