Puccinia malvacearum

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Puccinia malvacearum infection on Malva neglecta with telia (click on image to enlarge it)
Author(s): Whitney Cranshaw, Colorado State University
Source: IPM Images

Puccinia malvacearum Bertero ex Mont. 1852

This fungus is widely distributed and causes a rust disease on Malva as well as other Malvaceae. Brown to reddish-brown telia are formed on the lower side of the leaves with elongated teliospores, around 40-70 x 20 µm long attached to a hyaline pedicel. The teliospores germinate to form basiospores. Aecia and uredinia are not produced. The fungus overwinters on plant debris.

Publications covering Puccinia malvacearum

MycoKeys (2018) 39, 63-73
M. Catherine Aime and Mehrdad Abbasi (2018)
Puccinia modiolae in North America: distribution and natural host range

Journal of Plant Pathology (2006) 88, p. 225 (Kavak)
H. Kavak (2006)
First report of Puccinia malvacearum on Althea rosea in Turkey