Abstract

SOLANO-BAEZ, R.; LEYVA-MIR, Santos Gerardo; TLAPAL-BOLANOS, Bertha  and  MARISCAL-AMARO, L. A.. Etiology and response of chrysanthemum cultivars to stem rot in the State of Mexico. Rev. Chapingo Ser.Hortic [online]. 2013, vol.19, n.1, pp.49-59. ISSN 2007-4034.  https://doi.org/10.5154/r.rchsh.2010.06.121.

Chrysanthemum (Dendranthema x grandiflorum Ramat.) is one of the most important flowers grown in the world. Fungal diseases are the largest cause of economic losses during the production of this ornamental under greenhouse and field conditions. The aims of this study were: to identify the causal agent of chrysanthemum stem rot and to evaluate the response to infection of six chrysanthemum cultivars produced in greenhouses in Texcoco, State of Mexico. The causal agent of this disease was identified as Fusarium solani Appel & Wollenweber. (Teleomorph: Haemanectria haematococca Samuels & Nirenberg.) based on morphological, molecular and pathogenic characterization. In order to evaluate the response of chrysanthemum cultivars to infection by F. solani, plantlets were inoculated with a conidial suspension of 1 x 10⁶ spores·ml⁻¹. Disease severity was assessed on a 0-6 scale at 15 days after inoculation. The results indicated that all six tested cultivars were susceptible to infection. 'Polar', 'Eleonora', 'Indianapolis' and 'Quail' were the most susceptible cultivars, whereas 'Puma' and 'Spider' were relatively tolerant.

Keywords : Dendranthema x grandiflorum; Fusarium solani; Haemanectria haematococca; pathogenicity.

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