Data/hora: 10/06/2024 10:30:38

Biblioteca(s): | Embrapa Trigo.
Data corrente: | 04/03/2022
Data da última atualização: | 04/03/2022
Autoria: | VICENTINI, S. N. C.; CASADO, P. S.; CARVALHO, G. de; MOREIRA, S. I.; DORIGAN, A. F.; SILVA, T. C.; SILVA, A. G. da; CUSTÓDIO, A. A. de P.; GOMES, A. C. dos S.; MACIEL, J. L. N.; HAWKINS, N.; MCDONALD, B. A.; FRAAIJE, B. A.; CERESINI, P. C.
Afiliação: | SAMARA N. C. VICENTINI, UNESP; PRISCILA S. CASADO, UNESP; GISELLE DE CARVALHO, UNESP; SILVINO I. MOREIRA, UNESP; ADRIANO F. DORIGAN, UFLA; TATIANE CARLA SILVA, UNESP; ABIMAEL GOMES DA SILVA, UNESP; ADRIANO AUGUSTO DE PAIVA CUSTÓDIO, IAPAR; ANA CAROLINA DOS SANTOS GOMES, UNESP; JOAO LEODATO NUNES MACIEL, CNPT; NICHOLA HAWKINS, National Institute of Agricultural Botany; BRUCE A. MCDONALD, Plant Pathology Group; BART A. FRAAIJE, National Institute of Agricultural Botany; PAULO C. CERESINI, UNESP.
Título: | Monitoring of Brazilian wheat blast field populations reveals resistance to QoI, DMI, and SDHI fungicides.
Edição: | ,
Ano de publicação: | 2021
Fonte/Imprenta: | Plant Pathology, v. 71, n. 2, p. 304-321, 2021.
DOI: | https://doi.org/10.1111/ppa.13470
Idioma: | Inglês
Conteúdo: | Abstract: 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.
Palavras-Chave: | Carboxiami; Fluxapiroxade; Fluxapyroxad; Linhagem Pyricularia oryzae Triticum; Non target site resistance; Pyricularia oryzae Triticum; Resistência a fungicidas; Resistência do local não-alvo; Second-generation carboxamides; Succinate dehydrogenase inhibitors.
Categoria do assunto: | --
Registro original: | Embrapa Trigo (CNPT)
Exemplares: | CNPT - (45327-1) - UPC - AP - DD -  -  -  - DIS