Effects of Field Application of Tebuconazole on Yield, Yield Components and the Mycotoxin Content of Fusarium-infected Wheat Grain

Homdork, S.; Fehrmann, H.; Beck, R. H.

doi:10.1111/j.1439-0434.2000.tb04617.x

Cited by 55 publications

(33 citation statements)

References 18 publications

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“…(2000) found an increase in DON concentrations in wheat samples, which were grown under natural farming conditions. These findings are in alignment with results of Homdork et al . (2000b), who reported that the DON content of severely infected grain samples remained unchanged under any storage conditions, but increased in samples with slight or moderate infections.…”

Section: Discussionsupporting

confidence: 93%

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Correlation between DNA of trichothecene-producing Fusarium species and deoxynivalenol concentrations in wheat-samples

Schnerr

Vogel

Niessen

2002

Lett Appl Microbiol

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Aims: Correlations between DNA content of trichothecene-producing Fusarium spp. and concentration of the key mycotoxin deoxynivalenol (DON) in cereal samples. Methods and Results: A LightCyclerÔ PCR-based assay was used to quantify the DNA from trichothecene-producing Fusarium spp. in 300 wheat samples. DNA concentrations ranged from not detectable to 16AE3 mg kg )1 whereas DON concentrations (GC/MS data) varied from not detectable to 34AE3 mg kg )1 . Data analysis revealed a coefficient of correlation r ¼ 0AE9557 between DON concentrations and DNA-amounts over all samples. An interval of confidence for P ¼ 95% was calculated based on samples with DON concentrations £ 1AE5 mg kg )1 (n ¼ 234). Conclusions: Quantification of 32 samples of Fusarium-contaminated wheat was performed within 45 min. Data analysis allowed estimation of DON contamination from quantitative PCR data in the wheat samples. Significance and Impact of the Study: The method described is useful for the screening of cereals in industrial quality control.

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Section: Discussionsupporting

confidence: 93%

“…2000) does not accurately reflect changes in cell number. On the other hand, Homdork et al . (2000b) used a microbiological method to assess the number of infected grains during storage and compared it to DON concentrations.…”

Section: Discussionmentioning

confidence: 99%

Correlation between DNA of trichothecene-producing Fusarium species and deoxynivalenol concentrations in wheat-samples

Schnerr

Vogel

Niessen

2002

Lett Appl Microbiol

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“…& E.G. Germano], and higher grain yield and kernel weight regardless of whether there were one or two applications (Homdork et al 2000).…”

mentioning

confidence: 99%

Are early foliar fungicide applications on durum wheat grown in southeast Saskatchewan beneficial in increasing grain productivity?

Fernandez

May

Chalmers³

et al. 2014

Can. J. Plant Sci.

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Fernandez, M. R., May, W. E., Chalmers, S., Savard, M. E. and Singh, A. K. 2014. Are early foliar fungicide applications on durum wheat grown in southeast Saskatchewan beneficial in increasing grain productivity? Can. J. Plant. Sci. 94: 891–903. Producers have expressed interest in applying fungicides early in the development of durum wheat to reduce disease severity and increase grain yield. To address this issue, a field trial was conducted in southeast Saskatchewan (2004–2006) to determine the impacts of single and double foliar fungicide (tebuconazole) applications at various growth stages on leaf spotting, Fusarium head blight/Fusarium-damaged kernels, deoxynivalenol concentration, dark kernel discolouration, and grain traits of durum wheat. In most cases, application at stem elongation was not effective in reducing Fusarium diseases, or improving yield and grain characteristics. Application at flag leaf emergence was more effective, but for the most part, application at anthesis resulted in the most consistent reduction in disease levels, and improvement in test weight. Double fungicide applications (stem elongation or flag leaf emergence, and anthesis) were not more effective in disease control than a single application at anthesis. Grain yield did not differ significantly among any of the treatments. In contrast to Fusarium diseases and leaf spotting, fungicide applications at stem elongation and/or flag leaf emergence resulted in increased kernel weight and percentage dark kernel discolouration, which was significant in 2005 (10.53–10.60% total kernel discolouration in the stem and flag leaf treatments vs. 6.13% for the untreated control). In one or more years, kernel weight was negatively associated with Fusarium disease variables and leaf spotting, but positively associated with kernel discolouration. We conclude that under variable environmental conditions in Saskatchewan, early preventative fungicide use on durum wheat should not be recommended as a strategy to improve productivity, and might even result in increases in dark kernel discolouration and grain downgrading.

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“…The results of the studies on the effect of fungicides as a research factor on the extent of Fusarium infestation and the content of DON are not unambiguous, this may result from the use of fungicides containing various active substances, different doses and terms of application, diversity of pathogens attacking the plant, differences between varieties, and various weather conditions [53]. In the studies of Homdork et al [54], the use of triazole fungicide lowered the concentration of DON in grain after inoculation compared with the control group. In turn, the use of fungicide in conditions of natural infestation did not have a significant impact on the level of DON and NIV reduction in the grain [55].…”

Section: Discussionmentioning

confidence: 99%

Application of Artificial Neural Networks to Analyze the Concentration of Ferulic Acid, Deoxynivalenol, and Nivalenol in Winter Wheat Grain

2020

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Biotic stress, which includes infection by pathogenic fungi, causes losses of wheat yield in terms of quantity and quality. Ear Fusarium is caused by strains of F. graminearum and F. culmorum, which can produce mycotoxins—deoxynivalenol (DON) and nivalenol (NIV). One of the wheat’s defense mechanisms against stressors is the activation of biosynthesis pathways of antioxidant compounds, including ferulic acid. The aim of the study was to conduct pilot studies on the basis of which neural models were created that would examine the impact of the variety and weather conditions on the concentration of ferulic acid, and link its content with the concentration of deoxynivalenol and nivalenol. The plant material was 23 winter wheat genotypes with different Fusarium resistance. The field experiment was conducted in 2011–2013 in Poland in three experimental combinations, namely: with full chemical protection; without chemical protection, but infested with natural disease (control); and in the absence of fungicidal protection, with artificial inoculation by genus Fusarium fungi. As a result of the pilot studies, three neural models—FERUANN analytical models (ferulic acid content), DONANN (deoxynivalenol content) and NIVANN (nivalenol content)—were produced. Each model was based on 14 independent features, 12 of which were in the form of quantitative data, and the other two were presented as qualitative data. The structure of the created models was based on an artificial neural network (ANN) of the multilayer perceptron (MLP) with two hidden layers. The sensitivity analysis of the neural network showed the two most important features determining the concentration of ferulic acid, deoxynivalenol, and nivalenol in winter wheat seeds. These are the experiment variant (VAR) and winter wheat variety (VOW).

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Effects of Field Application of Tebuconazole on Yield, Yield Components and the Mycotoxin Content of Fusarium-infected Wheat Grain

Cited by 55 publications

References 18 publications

Correlation between DNA of trichothecene-producing Fusarium species and deoxynivalenol concentrations in wheat-samples

Correlation between DNA of trichothecene-producing Fusarium species and deoxynivalenol concentrations in wheat-samples

Are early foliar fungicide applications on durum wheat grown in southeast Saskatchewan beneficial in increasing grain productivity?

Application of Artificial Neural Networks to Analyze the Concentration of Ferulic Acid, Deoxynivalenol, and Nivalenol in Winter Wheat Grain

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