Resumo

LEIVA-MORA, Michel et al. Differential aggressiveness amongs Botrytis cinerea Pers. isolates in Fragaria vesca L. cv. Albion. Rev. Protección Veg. [online]. 2019, vol.34, n.1  Epub 01-Abr-2019. ISSN 2224-4697.

Aggressiveness in plant pathogenic fungi is defined as the negative quantitative effect they cause on their respective hosts. In the present work, fruits of strawberry (Fragaria vesca cv. Albion) with symptoms of gray mold (Botrytis cinerea Pers.) were collected from the farm property of Mr. Juan Panimboza Yanzapanta in the Cevallos canton of the Tungurahua province. Ecuador, from December 2016 to March 2017. The inoculation trials were performed on ripe strawberry fruits of the cv. Albion. The fruits were immersed in conidial suspensions of the different fungal isolates and left in the laminar flow cabinet. They were then placed in hermetic bags with a piece of moistened cotton wool and incubated at 20°C in the dark for 10 days. Nine isolates of B. cinerea pathogenic to the strawberry fruit were obtained, but the most aggressive were the isolates CC-ESPOCH-Bc-6, CC-ESPOCH-Bc-4, and CC-ESPOCH-Bc-7. This is the first report on differential aggressiveness of B. cinerea isolates in F. vesca cv. Albion in Ecuador, which provides the basis for future studies on the identification of virulence factors developed by the Ecuadorian populations of B. cinerea in strawberry and, with it, the selection of durable sources of resistance.

Palavras-chave : ascomycete; gray mold; strawberry; virulence.

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