CSIRO PUBLISHING www.publish.csiro.au/journals/apdn Australasian Plant Disease Notes, 2009, 4,62–63
Two new hosts, Epidendrum secundum and Epidendrum xanthinum, for the orchid rust Sphenospora kevorkianii (Raveneliaceae) in Brazil
O. L. PereiraA,B and M. SilvaA
ADepartamento de Fitopatologia, Universidade Federal de Vicosa,¸ 36570-000 Vicosa,¸ M.G., Brazil. BCorresponding author. Email: [email protected]
Abstract. The rust Sphenospora kevorkianii, is reported on two new orchid hosts, Epidendrum secundum and Epidendrum xanthinum, in the state of Minas Gerais, Brazil.
Epidendrum secundum is an orchid with either an epiphytical or In 2006, an exploratory project to survey and describe the terrestrial habitat, characteristic of the Brazilian campos rupestres phytopathogenic fungi associated with the family Orchidaceae (montane grassland savanna). Epidendrum xanthinum is an in the state of Minas Gerais, Brazil was initiated (Silva and Pereira epiphytic species characteristic of the Brazilian Atlantic 2007, 2008; Silva et al. 2008). During this survey in the campos rainforest. Both species are propagated by many Brazilian rupestres of Carrancas city and on a commercial orchid nursery in orchid growers, especially E. secundum for its cut flowers. Araponga city, samples of the rust-infected orchids E. secundum
(a) (a)
(b) (b)
Fig. 1. Rust symptoms on adaxial and abaxial leaf surfaces of Epidendrum Fig. 2. Rust symptoms on adaxial and abaxial leaf surfaces of Epidendrum secundum (VIC 30693). xanthinum (VIC 30694).