Barley spot blotch intensity, damage, and control response to foliar fungicide application in southern Brazil

Agostinetto, Lenita; Casa, Ricardo Trezzi; Bogo, Amauri; Sachs, Cristiano; Souza, Clóvis Arruda; Reis, Erlei Melo; Cunha, Isabel Cristina da

doi:10.1016/j.cropro.2014.09.012

Cited by 12 publications

(7 citation statements)

References 16 publications

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“…It is a plant with great adaptability, sown in several regions of the globe and at different latitudes. In Brazil, it is mainly sown in the South as a winter crop (Agostinetto et al, 2015). The country produces 317 thousand tons in 85 thousand hectares (Faostat, 2016), which only meets 43% of the demands of the Brazilian malt-production industry.…”

Section: Introductionmentioning

confidence: 99%

Agronomic characterization of high-yielding irrigated barley accessions in the Cerrado

Sayd

Amábile

Faleiro

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to estimate the genetic, phenotypic, and environmental parameters of 113 barley accessions (Hordeum vulgare), previously selected based on high yield, in an irrigated production system in the Cerrado (Brazilian savanna), for use in breeding programs in Brazil. The experiment was conducted in 2013 at two sites in the Federal District, using a randomized complete block design with three replicates. The evaluated traits were: grain yield, kernel plumpness, thousand grain weight, plant height, lodging, and days to heading. Significant differences were observed between environment and accessions for all studied traits, as well as genotype x environment interaction. The MCU 3832 PI 402310, MCU 3484 PI 401962, CI 08053 Custer, MCU 3634 PI 402112, and MCU 3816 PI 402294 accessions stood out regarding grain yield and kernel plumpness. It is possible to obtain high selection gains with high heritability values. However, indirect selection is not recommended in the experimental conditions due to the low genotypic and phenotypic correlations obtained. It is also possible to select barley accessions with high yield and early heading date simultaneously, an important factor in the genotype selection process for future experiments. The accessions from Colombia are the most adapted to the Cerrado conditions.

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Section: Introductionmentioning

confidence: 99%

Agronomic characterization of high-yielding irrigated barley accessions in the Cerrado

Sayd

Amábile

Faleiro

et al. 2017

Pesq. agropec. bras.

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“…Indeed, an increase in disease severity by 32.5% during grain filling phase caused a reduction in thousand grain weight by 18.3% in Grace. In line with this, Agostinetto et al [44] demonstrated that the strongest relationship between grain yield reduction and barley spot blotch severity occurred after the booting stage of barley. Furthermore, Khan [9] observed a reduction in barley grain yield by 25-35% from net blotch, mainly due to a significant decrease in thousand grain weight.…”

Section: Discussionmentioning

confidence: 66%

Pyrenophora teresandRhynchosporium secalisinfections in malt barley as influenced by genotype, spatial and temporal effects and nitrogen fertilization

Vahamidis

Stefopoulou

Lagogianni

et al. 2019

Preprint

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SummaryNet form net blotch (NFNB) and barley leaf scald are among the most important barley diseases worldwide and particularly in Greece. Their occurrence in malt barley can exert a significant negative effect on malt barley grain yield and quality. An experimental trial across two growing seasons was implemented in Greece in order i) to assess the epidemiology of NFNB and leaf scald in a barley disease free area when the initial inoculation of field occurs through infected seeds, and ii) to further explore the relationship among nitrogen rate, grain yield, quality variables (i.e. grain protein content and grain size) and disease severity and epidemiology. It was demonstrated that both NFNB and leaf scald can be carried over from one season to the next on infected seed under Mediterranean conditions. However, disease severity was more pronounced after barley tillering phase when soil had been successfully inoculated first. When nitrogen rate and genotype were the main sources of variation the epidemiology assessment was implemented with hotspot and Anselin Local Moran’s I analysis. It was found that the location of hotspots was modified during growing season. Soil and plant variables were assessed for the explanation of this variability. According to commonality analysis the effect of distance from the locations with the highest disease infections was a better predictor of disease severity (for both diseases) compared to nitrogen rate during pre-anthesis period. However, disease severity after anthesis was best explained by nitrogen rate only for the most susceptible cultivars to NFNB. The effect of disease infections on yield, grain size and grain protein content varied in relation to genotype, pathogen and stage of crop development. The importance of crop residues on the evolution of both diseases was also highlighted.

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“…Indeed, an increase in disease severity by 32.5% during the grain filling phase caused a reduction in the thousand grain weight by 18.3% in Grace. In line with this, Agostinetto et al [58] demonstrated that the strongest relationship between grain yield reduction and barley spot blotch severity occurred after the booting stage of barley. Furthermore, Khan [9] observed a reduction in barley grain yield by 25-35% from net blotch, mainly due to a significant decrease in thousand grain weight.…”

Section: Discussionmentioning

confidence: 68%

Pyrenophora teres and Rhynchosporium secalis Establishment in a Mediterranean Malt Barley Field: Assessing Spatial, Temporal and Management Effects

et al. 2020

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Malt barley is one of the promising crops in Greece, mainly due to high yields and contract farming, which have led to an increase in malt barley acreage. Net form net blotch (NFNB), caused by Pyrenophora teres f. teres, and barley leaf scald, caused by Rhynchosporium secalis, are among the most important barley diseases worldwide and particularly in Greece. Their occurrence in malt barley can exert a significant negative effect on malt barley grain yield and quality. An experimental trial across two growing seasons was implemented in Greece in order (i) to estimate the epidemiology of NFNB and leaf scald in a barley disease-free area when the initial inoculation of the field occurs through infected seeds, (ii) to explore the spatial dynamics of disease spread under the interaction of the nitrogen rate and genotype when there are limited sources of infected host residues in the soil and (iii) to assess the relationship among the nitrogen rate, grain yield, quality variables (i.e., grain protein content and grain size) and disease severity. It was confirmed that both NFNB and leaf scald can be carried over from one season to the next on infected seed under Mediterranean conditions. However, the disease severity was more pronounced after the barley tillering phase when the soil had been successfully inoculated, which supports the hypothesis that the most important source of primary inoculum for NFNB comes from infected host residue. Increasing the rate of nitrogen application, when malt barley was cultivated in the same field for a second year in a row, caused a non-significant increase in disease severity for both pathogens from anthesis onwards. However, hotspot and commonality analyses revealed that spatial and genotypic effects were mainly responsible for hiding this effect. In addition, it was found that the effect of disease infections on yield, grain size and grain protein content varied in relation to the genotype, pathogen and stage of crop development. The importance of crop residues in the evolution of both diseases was also highlighted.

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Barley spot blotch intensity, damage, and control response to foliar fungicide application in southern Brazil

Cited by 12 publications

References 16 publications

Agronomic characterization of high-yielding irrigated barley accessions in the Cerrado

Agronomic characterization of high-yielding irrigated barley accessions in the Cerrado

Pyrenophora teresandRhynchosporium secalisinfections in malt barley as influenced by genotype, spatial and temporal effects and nitrogen fertilization

Pyrenophora teres and Rhynchosporium secalis Establishment in a Mediterranean Malt Barley Field: Assessing Spatial, Temporal and Management Effects

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