Caracterización patogénica de aislados de Cladosporium fulvum Cooke. Procedentes de invernadero del sector Izamba cantón Ambato

Abstract

The gray mold of the leaf or also called Cladosporium fulvum was described by Cooke in 1883, the same one that develops in different crops, but attacks especially in the tomato crop since it has favorable conditions for its dissemination. For the present investigation, the objective was to evaluate the pathogenicity of monosporic isolates of Cladosporium fulvum Cooke from samples of Solanum lycopersicum L. from the Izamba sector, Tungurahua, Ecuador. To evaluate the pathogenicity, the isolates from the C. fulvum culture collection deposited in the Microbiology laboratory of the Faculty of Agricultural Sciences of the Technical University of Ambato were activated in PDA culture media to be able to count with the neubauer, for the sowing of differential cultivars we proceeded to use substrates, llama manure that were deposited in one-liter tubs to later be inoculated with C. fulvum, obtaining as results a different concentration for each cultivar (Cf0 -77 ml-1, Cf2 -96 ml-1, Cf4-90.9 ml-1, Cf5-65 ml-1 and Cf6-68 ml-1), in addition to a higher percentage of infection in the Cf5 cultivar with 58% while the Cf0 cultivars , Cf2, Cf4 and Cf6 maintain an average between 20-30% in terms of the study factor in which it was determined that the first signs and symptoms of the disease caused by C. fulvum are chlorotic spots on the upper part of the leaves