Diaporthe citri (H.S. Fawc.) F.A. Wolf, J. Agric. Res., Washington 33(7): 625, 1926.

Yang, Qin, Jiang, Ning & Tian, Cheng-Ming, 2021, New species and records of Diaporthe from Jiangxi Province, China, MycoKeys 77, pp. 41-64 : 41

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https://dx.doi.org/10.3897/mycokeys.77.59999

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scientific name

Diaporthe citri (H.S. Fawc.) F.A. Wolf, J. Agric. Res., Washington 33(7): 625, 1926.
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Diaporthe citri (H.S. Fawc.) F.A. Wolf, J. Agric. Res., Washington 33(7): 625, 1926. Figure 4 View Figure 4

Description.

Leaf spots subcircular to irregular, pale brown, with dark brown at margin. Pycnidia solitary, scattered on the leaf surface. Pycnidial conidiomata in culture, globose, erumpent, single or clustered in groups of 3-5 pycnidia, coated with hyphae, cream to yellowish translucent conidial droplets exuded from ostioles. Conidiophores reduced to conidiogenous cells. Conidiogenous cells hyaline, unbranched, septate, straight, slightly tapering towards the apex, 14.5-25 × 2-3 μm. Alpha conidia hyaline, aseptate, rounded at one end, apex at the other end, usually with two large guttulate, (9.5-)10.5-12 × 3.5-4.5 μm. Beta conidia not observed.

Culture characters.

Colony originally flat with white fluffy aerial mycelium, becoming greyish mycelium with age, with yellowish-cream conidial drops exuding from the ostioles.

Specimens examined.

China. Jiangxi Province: Ganzhou City, on leaves of Citrus sinensis , 24°59'44"N, 115°31'01"E, 13 May 2018, Q. Yang, Y. Liu & Y.M. Liang (BJFC-S1658; living culture: CFCC 53079 and CFCC 53080); 24°59'45"N, 115°31'02"E, 13 May 2018, Q. Yang, Y. Liu & Y.M. Liang (BJFC-S1659; living culture: CFCC 53081 and CFCC 53082).

Notes.

Diaporthe citri is a widely distributed species in citrus-growing regions. In the present study, four isolates (CFCC 53079, CFCC 53080, CFCC 53081 and CFCC 53082) from symptomatic leaves of Citrus sinensis were congruent with D. citri , based on DNA sequence and morphological data (Fig. 1 View Figure 1 ). The clade was, therefore, confirmed to be D. citri .