title: [In vitro susceptibility of Trichoconiella padwickii to various active ingredients used as fungicides in the cultivation of rice].
abstract: The aim of this study was to evaluate in vitro the mycelial susceptibility of Trichoconiella padwickii to different active ingredients through average median concentration IC50calculation. Inoculum disks were seeded on bean agar at different concentrations (0.1; 1; 10; 30, 50; 100 and 1000mg/l) of various fungicides. After seven days the colony diameter was measured. The data obtained were fitted to nonlinear regression models. Susceptibility was classified using the scale proposed by Edgington. The results show that the pathogen is very sensitive to products that act on the respiratory chain (quinone outside inhibitors [QoI] and succinate dehydrogenase inhibitors [SDHI]) and cell membrane (multi-site contact activity), and moderately sensitive to those products interfering with cell division (methyl benzimidazole carbamates [MBC]), synthesis of nucleic acids (phenylamides [PA]) and osmotic signal transduction (multi-site contact activity). This work is the first record on the sensitivity of T. padwickii.
authors.affiliation: Fitopatología, Facultad de Ciencias Agrarias, Universidad Nacional del Nordeste, Corrientes, Argentina. Electronic address: alfodamian@gmail.com.
authors.forename: Alfonso D
authors.initials: AD
authors.lastname: Lovato Echeverria
authors.affiliation: Fitopatología, Facultad de Ciencias Agrarias, Universidad Nacional del Nordeste, Corrientes, Argentina.
authors.forename: Susana A
authors.initials: SA
authors.lastname: Gutiérrez
authors.affiliation: Fitopatología, Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina.
authors.forename: Marcelo A
authors.initials: MA
authors.lastname: Carmona
mesh_terms: D025141:Drug Resistance, Fungal; D005658:Fungi / Q000187:drug effects; D005659:Fungicides, Industrial; D012275:Oryza / Q000382:microbiology; D010935:Plant Diseases
chemical_list: D005659:Fungicides, Industrial
keywords: CI(50); Fungicida; Fungicides; IC(50); Patógeno de Semilla; Seed-borne pathogen