02613naa a2200421 a 450000100080000000500110000800800410001902400430006010000240010324501340012725000060026126000090026752013090027665300150158565300180160065300170161865300410163565300310167665300320170765300300173965300360176965300350180565300390184070000180187970000200189770000190191770000190193670000170195570000200197270000270199270000240201970000210204370000160206470000200208070000190210070000200211977300520213921405582022-03-04       2021    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1111/ppa.134702DOI1 aVICENTINI, S. N. C.  aMonitoring of Brazilian wheat blast field populations reveals resistance to QoI, DMI, and SDHI fungicides.h[electronic resource]  a,  c2021  aAbstract: Wheat blast is one of the most important and devastating fungal diseases of wheat in South America, South-east Asia, and now in southern Africa. The disease can reduce grain yield by up to 70% and is best controlled using integrated disease management strategies. The difficulty in disease management is compounded by the lack of durable host resistance and the ineffectiveness of fungicide sprays. New succinate dehydrogenase inhibitor (SDHI) fungicides were recently introduced for the management of wheat diseases. Brazilian field populations of the wheat blast pathogen Pyricularia oryzae Triticum lineage (PoTI) sampled from different georgraphical regions in 2012and 2018 were shown to be resistant to both QoI (strobilurin) and DMI (azole) fungicides. The main objective of the current study was to determine the SDHI baseline sensitivity in these populations. Moderate levels of SDHI resistance were detected in five out of the six field populations sampled in 2012 and in most of the strains isolated in 2018. No association was found between target site mutations in the sdhB, sdhC, and sdhD genes and the levels of SDHI resistance, indicating that a pre-existing resistance mechanism not associated with target site mutations is probably present in Brazilian wheat blast populations.  aCarboxiami  aFluxapiroxade  aFluxapyroxad  aLinhagem Pyricularia oryzae Triticum  aNon target site resistance  aPyricularia oryzae Triticum  aResistência a fungicidas  aResistência do local não-alvo  aSecond-generation carboxamides  aSuccinate dehydrogenase inhibitors1 aCASADO, P. S.1 aCARVALHO, G. de1 aMOREIRA, S. I.1 aDORIGAN, A. F.1 aSILVA, T. C.1 aSILVA, A. G. da1 aCUSTÓDIO, A. A. de P.1 aGOMES, A. C. dos S.1 aMACIEL, J. L. N.1 aHAWKINS, N.1 aMCDONALD, B. A.1 aFRAAIJE, B. A.1 aCERESINI, P. C.  tPlant Pathologygv. 71, n. 2, p. 304-321, 2021.