Compatibilidade de fungicidas utilizados no manejo fitossanitário da ferrugem alaranjada da cana-de açúcar (Puccinia kuehnii) (W. Krüger) com isolados de Metarhizium anisopliae (Metsch.) Sorok. (Deuteromycotina: hyphomycetes)

Abstract

This study evaluated the compatibility of 5 fungicides used to control disease of orange rust of cane sugar (Puccinia kuehnii) with 4 isolates of Metarhizium anisopliae. Tests were conducted at the Laboratory of Microbiology, in Federal University of Grande Dourados. In the treatments were used 2 fungicides formulations that were recorded to orange rust and three formulations of the same chemical group that might be recorded for the pathogen in an emergency. The 4 isolates of the entomopathogenic fungus M. anisopliae used in compatibility testing were IBCB 348, IBCB 425, UFGD 21 and UFGD 22. Data analysis allowed to infer that none of the fungicides tested were compatible with the isolates. The strobilurine present in the formulations of fungicides prevents cellular respiration and that fact may have prevented the germination of conidia.