Efecto del fungicida iprodione y sus mezclas con thiram y triticonazole en el control de Drechslera teres en semillas de cebada

Carmona, Marcelo; Barreto, D.; Reis, Erlei Melo

doi:10.1590/s0100-41582001000200010

Cited by 6 publications

(13 citation statements)

References 3 publications

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“…P. teres is the pathogen most frequently found on barley seeds in Argentina 16 . Seed transmission of the pathogen, that is, the passage from the seed to the coleoptile and/or plumule of the barley seedling, has been clearly demonstrated in previous studies.…”

Section: Introductionmentioning

confidence: 89%

“…NB exists as the net and spot form, caused by P. teres f. teres ( Ptt ) and P. teres f. maculata ( Ptm ) respectively 2,3 . In Argentina, NB is endemic in all regions where barley is grown 4,5 . Symptoms of the disease can manifest from the first phenological stages of barley crops.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, the mixture of the SDHI fungicide fluxapyroxad plus the azole fungicide triticonazole is one of the most used fungicides for barley seed treatment. This treatment has allowed obtaining successful results in the control of several seed‐borne pathogens of barley, such as Ptt , Rcc and Bipolaris sorokiniana 10,16 …”

Section: Introductionmentioning

confidence: 99%

“…In NB, foliar application of fungicides should be recommended when the disease reaches an economic level of damage or when the alarm threshold justifies the chemical control 16,20,21 . Currently, the fungicidal active ingredients (a.i.)…”

Section: Introductionmentioning

confidence: 99%

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SDHI resistance in Pyrenophora teres f teres and molecular detection of novel double mutations in sdh genes conferring high resistance

Sautua

Carmona

2023

Pest Management Science

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BACKGROUND: Net blotch (NB), caused by Pyrenophora teres f. teres (Ptt), is an important disease of barley worldwide. NB control is commonly achieved through the use of fungicide mixtures including strobilurins, triazoles and carboxamides. Succinate dehydrogenase inhibitors (SDHI) are important components of fungicide management programs of barley diseases. However, during the last growing seasons in Argentina, barley fields sprayed with mixtures containing SDHI fungicides have shown failures in NB control. Here, we report the isolation and characterization of Argentine Ptt strains resistant to SDHI fungicides.RESULTS: Compared against a sensitive (wild-type) reference strain collected in 2008, all 21 Ptt isolates collected in 2021 exhibited resistance to pydiflumetofen and fluxapyroxad both in vitro and in vivo. Concordantly, all of them presented target-site mutations in any of the sdhB, sdhC and sdhD genes. Although the mutations detected have been previously reported in other parts of the world, this study documents for the first time the occurrence of double mutations in the same Ptt isolate. Specifically, the double mutation sdhC-N75S + sdhD-D145G confers high resistance to SDHI fungicides, while the double mutations sdhB-H277Y + sdhC-N75S and sdhB-H277Y + sdhC-H134R confer moderate levels of resistance in Ptt.CONCLUSIONS: SDHI-resistance in Argentine Ptt populations is expected to increase. These findings emphasize the urgent need to perform a wider survey and a more frequent monitoring of SDHI sensitivity of Ptt populations and to develop and implement effective antiresistance tactics.

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Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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SDHI resistance in Pyrenophora teres f teres and molecular detection of novel double mutations in sdh genes conferring high resistance

Sautua

Carmona

2023

Pest Management Science

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“…Iprodione is moderately persistent in soil, with a halflife of 7-60 days depending on environmental conditions (Carmona et al 2001). It is relatively mobile in the soil environment and leachable into groundwater and surface water, so its residues have been detected in many environment samples (Derbalah et al 2003;Omirou et al 2009;Wang et al 2012;Sequinatto et al 2013;Allen et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Isolation and characterization of a bacterium able to degrade high concentrations of iprodione

et al. 2018

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A bacterial strain CQH-1 capable of mineralizing iprodione was isolated and characterized. On the basis of its morphological, physiological, and biochemical characteristics combined with phylogenetic analysis of its 16S rRNA gene sequence, strain CQH-1 was identified as a Microbacterium sp. CQH-1. It was able to use iprodione and 3,5-dichloroaniline as the sole source of carbon and energy for its growth. It completely degraded 100 mg·L iprodione within 96 h at 30 °C. During the degradation of iprodione by strain CQH-1, 2 compounds were detected in GC-MS analysis and were recognized as N-(3,5-dichlorophenyl)-2,4-dioxoimidazolidine and 3,5-dichloroaniline. So, the biodegradation pathway of iprodione by strain CQH-1 was proposed. This is the first report of an iprodione-mineralizing strain from the genus Microbacterium, and strain CQH-1 might be a promising candidate for application in the bioremediation of iprodione-contaminated environments.

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Stability study of Iprodione in alkaline media in the presence of humic acids

Morales

Manso

Cid³

et al. 2013

Chemosphere

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The influence of humic aggregates in water solution upon the chemical stability of Iprodione has been investigated under basic conditions. Taking into account that an important part of soils are colloids, the possibility of its presence implies that soil composition and its structure will play an important role in the stability of this pesticide. A kinetic model was applied to this system and the kinetic coefficients were obtained. An inhibition upon the alkaline hydrolysis of Iprodione (2-fold) was observed and it was rationalized in terms of the micellar pseudophase model. These results have been compared with the corresponding ones in the same natural colloidal aggregates in the presence of other pesticides.

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Efecto del fungicida iprodione y sus mezclas con thiram y triticonazole en el control de Drechslera teres en semillas de cebada

Cited by 6 publications

References 3 publications

SDHI resistance in Pyrenophora teres f teres and molecular detection of novel double mutations in sdh genes conferring high resistance

SDHI resistance in Pyrenophora teres f teres and molecular detection of novel double mutations in sdh genes conferring high resistance

Isolation and characterization of a bacterium able to degrade high concentrations of iprodione

Stability study of Iprodione in alkaline media in the presence of humic acids

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