Identification of the powdery mildew caused by Erysiphe trifoliorum (Wallr.) U. Braun on Melilotus officinalis.

MAXIMILIANO RUGOLO; FRANCISCO KUHAR; MARÍA VICTORIA NOVAS; SILVIA EDITH LÓPEZ

Boletín Micológico

Universidad de Valparaíso

Lugar: Valparaíso; Año: 2016 vol. 2016 p. 36 - 37

0719-3114

Molecular identification of powdery mildews is challenging due to the impossibility of processing sterile mycelium or cultures. For this reason, unexpensive and fast methods based on conidial germination are still a very reliable alternative for identifications at the species level. Melilotus officinalis is a very extended forage crop in the central regions of Argentina. High incidence of a powdery mildew was diagnosed on a spontaneous population of this species in wetlands of the Río de la Plata close to the city of Buenos Aires. Conidial germination assays were conducted in different media and culture conditions in order to identify the pathogen to the species level.