Compatibilidade de Beauveria bassiana a fungicidas associados à ferrugem alaranjada da cana-de-açúcar

Abstract

This study aimed to evaluate the compatibility of fungicides Comet®, Approach®Prima, Caramba 90®, Priori Xtra® and Opera® with isolates IBCB 87, IBCB 06, UFGD 11 and ESALQ 447 UW of Beauveria bassiana. We performed the addition of pesticides in 200 ml of culture medium PDA (potato dextrose agar) at the concentrations recommended. The culture medium was poured into petri dishes and after solidification of the BDA at three equidistant points of the plate, the fungi were inoculated. The plates were incubated at 25±1oC and a photoperiod of 12 hours for a period of 7 days. Aft of entomopathogen er this period were the following parameters: vegetative growth, sporulation and germination ic fungi, necessary to calculate the compatibbilidade. The treatments significantly reduced the percentage of germinated conidia of the fungus B. bassiana, affecting compatibility between entomopathogenic fungi and fungicides. However new tests should be performed under field conditions.