INVESTIGADORES
COVACEVICH Fernanda
congresos y reuniones científicas
Título:
Efecto de la aplicación de fungicidas sobre la colonización micorrítica en dos híbridos de girasol
Autor/es:
COVACEVICH F; DOSIO GAA
Lugar:
Facultad de Agronomia, UBA-Ciudad Autónoma de Buenos Aires
Reunión:
Jornada; Jornadas de Biología de Suelos; 2004
Institución organizadora:
Facultad de Agronomia, UBA
Resumen:
The aim of this work was to determine if foliar applications of fungicides to control leaf and capitulum diseases of sunflower affect the native arbuscular mycorrhizal (MA) colonization of the crop. Mycorrhizal colonization of sunflowers (cv. Payé, KWS y Paraíso 30, Nidera S.A.) which were fumigated or not, were evaluated during two-year field experiment. Periodical leaf application of the fungicides Duett® (Basf, active substance Carbendazim+Epoxiconazole) and Amistar® (Syngenta, active substance Azoxistrobina) increased MA colonization of the sunflower crops. This could be consequence of the reduction of antagonistic microorganisms to MA fungi for the fungicides application. The decrease of fitoparasitic fungus increases the sugar availability on host roots, and thus the mycorrhization could be favored. Results shown that the application of the active substances evaluated to the sunflower production, would not affect the indigenous MA colonization.
