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

Conidia 17–93 × 3–5 μm, solitary, acicular to
obclavate, hyaline, 6–12-septate, non-constricted
at the septa, acute to obtuse at the apex,
truncate at the base, hila 1–3 µm in diam.,
conspicuous, thickened and darkened.
Specimen examined – THAILAND,
Chiang Mai province, Chiang Mai University,
on leaves of Basella alba L. (Basellaceae), 27
November 2005, Jamjan Meeboon (CMU
28214).
Hosts – Basella alba (Basellaceae)
(Srivastava et al. 1994, Meeboon et al. 2007d).
Distribution – India, Thailand (Srivastava
et al. 1994, Meeboon et al. 2007d).
Notes – Cercospora basellae-albae on
Basella alba has been previously recorded in
India. The first report of this species from
Thailand was by Meeboon et al. (2007d).
Crous & Braun (2003) noted that this species is
a true Cercospora s. str., close to or identical
with C. apii s. lat.
Brassicaceae
Cercospora brassicicola Henn., Bot. Jahrb.
Syst. 37: 166 (1906).
= Cercospora brassicae-campestris
Rangel, Arq. Mus. Nac., Rio de Janeiro 18: 163
(1917).
≡ Cercosporina brassicae-campestris
(Rangel) Sacc., Syll. Fung. 25: 899 (1931).
= Cercospora brassicae-juncea Sawada
(brassicae-yunciae), Special Publ. Coll. Agric.
Natl. Taiwan Univ. 8: 212 (1959) (nom. nud.).
= Cercospora bloxami auct. sensu E.
Young, Mycologia 8: 43 (1916). Fig. 34
Leaf spots 2–15 mm diam., amphigenous,
irregular, brown to dark brown, pale at the
center, with dark margin, and limited by vein
of the leaf. Caespituli amphigenous. Stromata
12.5–19.5 μm diam., substomatal to intraepidermal,
small, composed of a few globose to
subglobose, brown cells. Conidiophores 24.5–
64 × 3.5–5 μm, 6–11 in loose to dense fascicles,
1–3-septate, arising from stomata, straight to
decumbent, smooth, unbranched, cylindrical,
geniculate near the apex, brown at the base,
paler toward the apex. Conidiogenous cells
integrated, terminal or intercalary, phyloblastic,
sympodially proliferating. Conidiogenous loci
2.5–5 μm diam., conspicuous, thickened and
Plant Pathology & Quarantine
Fig. 34 – Line drawings of Cercospora
brassicicola on Raphanus sativus. a.
Conidiophores and stromata. b. Conidia. Bars
= 50 µm. (Meeboon 2009).
darkened. Conidia 54–135 × 2.5–5 μm, solitary,
obclavate to subacicular, straight, slightly
curved, hyaline, 7–16-septate, smooth, obconically
truncate at the base, tapering toward a
subacute apex, hila 2.5–4.5 μm diam.,
thickened and darkened.
Specimens examined – THAILAND,
Faculty of Agriculture, Chiang Mai University,
Chiang Mai Province, on leaves of Brassica
pekinensis Skeels (Brassicaceae), 31 October
2004, Jamjan Meeboon (CMU 27891); on
leaves of B. campestris L. (Brassicaceae), 15
October 2004, Jamjan Meeboon (CMU 27887);
on leaves of B. rapa L. (Brassicaceae), 9
November 2005, Jamjan Meeboon (CMU
27905); Suthep-Pui National Park, Chiang Mai
Province, on leaves of B. juncea (L.) Czern.
(Brassicaceae), 21 November 2004, Chiharu
Nakashima and Jamjan Meeboon (CMU
27901); Chiang Rai Province, A. Wiang Pa Pao,
on leaves of B. oleracea L. (Brassicaceae), 19
October 2005, Jamjan Meeboon (CMU 28218);
Chiang Mai Province, A. Mae Rim, Nong Hoi
Royal Project, on leaves of Raphanus sativus L.
(Brassicaceae), 12 September 2007, Jamjan
Meeboon and Iman Hidayat (BBH 23639);
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