Submitted to: Boletin de Sanidad Vegetal Plagas
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 10/31/2000
Publication Date: N/A
Interpretive Summary: Vine decline is a broad term used to describe a disease syndrome in cucurbits in which the vines begin to collapse and die as the fruit approach maturity. Rhizopycnis vagum is a newly described fungus that has been associated with vine decline in California and the Lower Rio Grande Valley of Texas. More recently, the fungus was found associated with vine declines of muskmelon in Spain. The purpose of this study was to compare virulence of Spanish isolates with California and Texas isolates. Results demonstrated that Spanish isolates were aggressive pathogens capable of causing extensive root rot on muskmelon. In addition, the Spanish isolates were similar in virulence to the California and Texas isolates.
Technical Abstract: Rhizopycnis vagum is a recently described genus and species of coelomycete that has been detected associated with muskmelon roots from plants affected by vine decline in different Spanish muskmelon production areas. In this work the morphological and cultural characteristics of this fungus, and the epathogenicity of four Spanish isolates to melon are studies. R. Vagum caused browning of the roots, reduced root systems, and eventually pink root. The contribution of R. vagum to the vine disease complex of muskmelon in Spain is discussed.