Evaluation of different fungicides for control of fusarium head blight in wheat inoculated with 3ADON and 15ADON chemotypes of<i>Fusarium graminearum</i>in Canada

Amarasinghe, Chami C.; Tamburic-Ilincic, L.; Gilbert, J.; Brûlé‐Babel, Anita L.; Fernando, W. G. Dilantha; Canada, Agri-Food

doi:10.1080/07060661.2013.773942

Cited by 47 publications

(25 citation statements)

References 20 publications

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“…The observed differences between contents of fungal metabolites and phenolic acids between the population of K and OCH samples may be explained by the fact that sublethal concentrations of fungicides trigger trichothecene biosynthesis (Ochiai et al 2007;Müllenborn et al 2008). On the other hand, all fungicides (prothioconazole, tebuconazole, metconazole and prothioconazole + tebuconazole) used in the study reduced FHB index and deoxynivalenol (DON) levels according to Amarasinghe et al (2013).…”

Section: Discussionmentioning

confidence: 99%

Study of metabolite profiles in winter wheat cultivars induced by Fusarium infection

Stuper‐Szablewska

Kurasiak-Popowska

Perkowski

2016

Cereal Research Communications

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The aim of this study was to determine the profile of fungal metabolites and antioxidant substances from plants on a representative population of wheat cultivars grown in Poland. Tests were conducted on grain of 23 wheat cultivars in three experimental variants: natural infection (control), chemical crop protection, and artificial inoculation with the fungi F. graminearum and F. culmorum. Grains were analysed in terms of infection rate, mycotoxin, ergosterol, free and bound phenolic acid content, as well as antioxidant capacity. Calculated Fusarium head blight index (FHB index) ranged from 0% to 24% in the control, from 0% to 95% after inoculation and from 0 to 3% following chemical crop protection treatments. The highest concentration of ergosterol was detected in seeds from inoculated plots, with a mean value of 26.69 mg/kg. The highest mean concentration calculated for total toxin content was recorded after inoculation (7.833 mg/kg). The mean value for ferulic acid for inoculated samples resulted 2574 mg/kg, while for chemically protected samples 1158 mg/kg was obtained.Based on of discriminant analysis genotypes can be separated for inoculation 100%, for chemical crop protection 95%, and for natural infection 90%. Amongst 12 analysed phenolic acids the highest discrimination power was found for gallic acid, 4-hydroxybenzoic acid and vanillic acid.

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Section: Discussionmentioning

confidence: 99%

Study of metabolite profiles in winter wheat cultivars induced by Fusarium infection

Stuper‐Szablewska

Kurasiak-Popowska

Perkowski

2016

Cereal Research Communications

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“…Disease incidence was expressed as the percentage of spikes infected in the plot, from 0% (no infection) to 100% (indicating all spikes examined were infected). FHB index was calculated as the combination of disease severity and disease incidence (Amarasinghe et al 2013). Each test had four replicates arranged in a randomized complete block design, and the experiment was repeated three times.…”

Section: Plant Inoculation and Disease Evaluationmentioning

confidence: 99%

Evaluation of resistance and the role of some defense responses in wheat cultivars to Fusarium head blight

Khaledi¹,

Taheri²,

Falahati-Rastegar³

2018

Journal of Plant Protection Research

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Fusarium graminearum and F. culmorum are the causal agents of Fusarium head blight (FHB) in cereal crops worldwide. Application of resistant cultivars is the most effective and economic method for management of FHB and reducing mycotoxin production in wheat. Understanding the physiological and biochemical mechanisms involved in basal resistance of wheat to FHB disease is limited. In this research, after screening resistance levels of eighteen wheat cultivars planted in Iran, Gaskozhen and Falat were identified as partially resistant and susceptible wheat cultivars against Fusarium spp., respectively. Also, we investigated the role of hydroxyl radical (OH − ), nitric oxide (NO), callose deposition, lipid peroxidation and protein content in basal resistance of wheat to the hemi-biotrophic and necrotrophic Fusarium species causing FHB. Nitric oxide as a signaling molecule may be involved in physiological and defensive processes in plants. Our results showed that NO generation increased in seedlings and spikes of wheat cultivars after inoculation with Fusarium species. We observed earlier and stronger callose deposition at early time points after infection by Fusarium spp. isolates than in non-infected plants, which was positively related to the resistance levels in wheat cultivars. Higher levels of OH − and malondialdehyde (MDA) accumulation (as a marker of lipid peroxidation) were observed in the Falat than in the Gaskozhen cultivar, under non-infected and infected conditions. So, estimation of lipid peroxidation could be useful to evaluate cultivars' susceptibility. These findings can provide novel insights for better recognition of physiological and biochemical markers of FHB resistance, which could be used for rapid screening of resistance levels in wheat cultivars against this destructive fungal disease.

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“…Variation in the efficacy of triazolebased fungicides in managing DON contamination has also been noted in another study. Amarasinghe et al (2013) reported that in some grain samples treated with prothioconazole and prothioconazole + tebuconazole there was a higher DON content than the controls without fungicide application, although these fungicides successfully reduced DON in most of the treatments. They explained that fungicide application reduced FHB symptoms and increased seed size sufficiently that diseased seeds were not lost in harvest, and thus, could contribute to a higher percentage of FDK and DON in the samples.…”

Section: Discussionmentioning

confidence: 99%

“…Successful control of FHB using triazolebased fungicides has been reported (Mesterházy et al 2003;Paul et al 2008;Wegulo et al 2011;Amarasinghe et al 2013), but several studies have also shown that azoxystrobin application led to increased DON contamination of grain in artificially inoculated field trials (Simpson et al 2001;Mesterházy et al 2003;Pirgozliev et al 2003). Integration of triazole-based fungicides, alone or in combination with moderately-resistant cultivars, tended to be more effective in reducing FHB index and DON accumulation in grain when compared with susceptible cultivars (Mesterházy et al 2003;Wegulo et al 2011;Amarasinghe et al 2013). In addition, fungicide effectiveness was more stable in resistant cultivars.…”

Section: Introductionmentioning

confidence: 99%

The role of genetics, growth habit, and cultural practices in the mitigation of Fusarium head blight

Ye¹,

Brûlé‐Babel²,

Graf

et al. 2017

Can. J. Plant Sci.

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Field trials were conducted under natural infection and artificial inoculation from 2012 to 2014 at seven sites across the Canadian prairies to determine genetic and management effects on Fusarium head blight (FHB) in wheat production systems. A system of management, which consisted of (1) a control of no fungicide was compared with (2) the seed treatment (ST) thiamethoxam + difenoconazole + metalaxyl-M + S-isomer, (3) an in-crop foliar fungicide (tebuconazole + prothioconazole), or (4) ST + foliar fungicide, was integrated with four wheat cultivars of contrasting growth habits and levels of FHB resistance. Results indicated the cultivars expressing improved FHB resistance, Carberry (spring wheat) and Emerson (winter wheat), were superior over susceptible cultivars, Harvest (spring wheat) and CDC Falcon (winter wheat), in reducing Fusarium-damaged kernel (FDK) and deoxynivalenol (DON) levels, and displayed higher yield under high Fusarium pressure. Winter wheat displayed higher overall yield, with Emerson producing the highest and most stable yields across environments. Application of foliar fungicide, with or without the ST, increased grain yield, seed mass, and test weight; and lowered FDK and DON. Seed treatment alone increased test weight, spring plant density of both winter wheat varieties, and kernel weight in Emerson. A management strategy of foliar fungicide and (or) ST + foliar fungicide generally produced higher yields with greater stability, particularly for susceptible cultivars in high FHB environments. The results of this study reinforce that integration of FHB-resistant cultivars with appropriate cultural practices is required to reduce the risk of FHB and optimize grain yield, and is further enhanced with a winter vs. spring growth habit.

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Evaluation of different fungicides for control of fusarium head blight in wheat inoculated with 3ADON and 15ADON chemotypes ofFusarium graminearumin Canada

Cited by 47 publications

References 20 publications

Study of metabolite profiles in winter wheat cultivars induced by Fusarium infection

Study of metabolite profiles in winter wheat cultivars induced by Fusarium infection

Evaluation of resistance and the role of some defense responses in wheat cultivars to Fusarium head blight

The role of genetics, growth habit, and cultural practices in the mitigation of Fusarium head blight

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