Phylum:Ascomycota >> Class: Dothideomycetes >> Order: Dothideomycetes | ||||
BCRC Number: | NO BCRC Number! | |||
Scientific Name: | Pseudocercospora theae | |||
Author: | Pseudocercospora theae (Cavara) Deighton. Trans. Br. mycol. Soc. 88:390, 1987. Basionym: Septoria theae Cavara, Revue mycol. Ll (44):190, 1889. |
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Description: | Leaf spots on the upper surface suborbicular to irregular, dark purplish brown, without definite margin, up to 10 mm wide, glassy or dingy on the lower surface. Fruiting chiefly hypophyllous, evenly and densely distributed over the spot. Stromata substomatal, spheroidal, 20-50 μm in width. Conidiophores densely fasciculate on the stromata, very pale olivaceous, smooth, not branched, 0-2 septate, substraight or very slightly sinuous, sometimes once abruptly geniculate near the truncate apex, conidiogenous cells not percurrent, 10-25 × 2-3.5 μm, conidial scars unthickened. Conidia acicular or cylindric to filiform, very pale olivaceous, straight to slightly curved or undulate, 3-11 septate, not constricted, subobtuse to obtuse at the apex, subtruncate to truncate at the base, 30-120 × 2-3 μm. | |||
Specimens: | Taiwan, Nantou Hsien, Luku, May, 1986, NCHUPP-217. |
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Habitat: | On leaves of Camellia sinensis (L.) Ktze. | |||
Distribution: | This fungus is very common and widespread throughout the Taiwan island. Nearly every tea cultivating fields (even those at high altitudes) can have this fungus seriously affecting the leaves. Also reported from Java, Hong Kong, Mauritius, Malawi, Nepal, and Tanzania. |
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References: | Hsieh, WH and Goh, TK. 1990. |
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Provided: | W. H. Hsieh |
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Note: | There are several other Cercospora-like fungi on Camellia spp. (Deighton, Mycol. Pap. No: 151, 1983), among which Stigmina theae Deighton also has subhyaline acicular conidia but it differs from this fungus by its percurrent conidiogenesis. | |||