Monitoring of Brazilian wheat blast field populations reveals resistance to QoI, DMI, and SDHI fungicides

被引：15

作者：

Vicentini, Samara N. C. ^{[1
]}

Casado, Priscila S. ^{[1
,2
]}

de Carvalho, Giselle ^{[1
,3
]}

Moreira, Silvino, I ^{[1
]}

Dorigan, Adriano F. ^{[4
]}

Silva, Tatiane C. ^{[1
]}

Silva, Abimael G. ^{[1
]}

Custodio, Adriano A. P. ^{[5
]}

Gomes, Ana Carolina S. ^{[1
]}

Maciel, Joao L. Nunes ^{[6
]}

Hawkins, Nichola ^{[7
,8
]}

McDonald, Bruce A. ^{[9
]}

Fraaije, Bart A. ^{[7
,8
]}

Ceresini, Paulo C. ^{[1
]}

机构：

[1] Sao Paulo State Univ, Dept Crop Protect Agr Engn & Soil, Dept Fitossanidade Engn Rural & Solos, UNESP, Ilha Solteira, SP, Brazil

[2] Vale Parana SA Alcool & Acucar, Suzanapolis, SP, Brazil

[3] SENAI, Biomass Innovat Inst, Tres Lagoas, MS, Brazil

[4] UFLA Fed Univ Lavras, Dept Plant Pathol, Lavras, MG, Brazil

[5] IDR Parana IAPAR, Parana Rural Dev Inst, Londrina, Parana, Brazil

[6] Brazilian Agr Res Corp EMBRAPA Wheat, Passo Fundo, RS, Brazil

[7] Rothamsted Res, Biointeract & Crop Protect, Harpenden, Herts, England

[8] Natl Inst Agr Bot, Cambridge, England

[9] Swiss Fed Inst Technol, Inst Integrat Biol, Plant Pathol Grp, Zurich, Switzerland

来源：

PLANT PATHOLOGY | 2022年 / 71卷 / 02期

基金：

英国生物技术与生命科学研究理事会; 巴西圣保罗研究基金会;

关键词：

fluxapyroxad; fungicide resistance; nontarget site resistance; Pyricularia oryzae Triticum lineage; second-generation carboxamides; succinate dehydrogenase inhibitors; BOTRYTIS-CINEREA; TRITICI;

D O I：

10.1111/ppa.13470

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

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 (PoTl) sampled from different geographical regions in 2012 and 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.

引用

页码：304 / 321

页数：18

共 32 条

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