Sensitivity of Magnaporthe oryzae populations to fungicides over a 25-year time frame in Brazil.
Sensitivity of Magnaporthe oryzae populations to fungicides over a 25-year time frame in Brazil.
Author(s): D'AVILA, L. S.; FILIPPI, M. C. C.; FILHO, A. C. C.
Summary: The changes in fungicide resistance frequency of the rice blast fungus Magnaporthe oryzae were monitored by examining an assembly of 60 isolates collected over a period of 25 years in conventional growers´ rice fields. Initially, the in vitro sensitivity of all isolates to fungicides Azoxystrobyn, Tryciclazole, Trifloxystrobin+Tebuconazole and Tebuconazole was measured. Over the 25-year (1989-2014) time frame, a gradual rise in the EC50 estimates for mycelial growth sensitivity was observed for all fungicides, but most strikingly for Azoxystrobin.
Publication year: 2019
Types of publication: Abstract in annals or event proceedings
Unit: Embrapa Rice & Beans
Keywords: Arroz, Controle Químico, Fungicida, Oryza Sativa
Observation
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