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Imidazolium salts with antifungal potential for the control of head blight of wheat caused by Fusarium graminearum

Byline: A.D. Ribas, E.M. Del Ponte, A.M. Dalbem, D. Dalla-Lana, C. Bundchen, R.K. Donato, H.S. Schrekker, A.M. Fuentefria Keywords: fungicides; Fusarium graminearum ; imidazolium salts; inhibition; wheat Abstract Aims Evaluate the in vitro effect of imidazolium salts (IMS) on the conidia germination... Full description

Journal Title: Journal of Applied Microbiology August 2016, Vol.121(2), pp.445-452
Main Author: Ribas, A. D.
Other Authors: Del Ponte, E. M. , Dalbem, A. M. , Dalla‐Lana, D. , Bündchen, C. , Donato, R. K. , Schrekker, H. S. , Fuentefria, A. M.
Format: Electronic Article Electronic Article
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ID: ISSN: 1364-5072 ; E-ISSN: 1365-2672 ; DOI: 10.1111/jam.13125
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title: Imidazolium salts with antifungal potential for the control of head blight of wheat caused by Fusarium graminearum
format: Article
creator:
  • Ribas, A. D.
  • Del Ponte, E. M.
  • Dalbem, A. M.
  • Dalla‐Lana, D.
  • Bündchen, C.
  • Donato, R. K.
  • Schrekker, H. S.
  • Fuentefria, A. M.
subjects:
  • Fungicides
  • Fusarium Graminearum
  • Imidazolium Salts
  • Inhibition
  • Wheat
ispartof: Journal of Applied Microbiology, August 2016, Vol.121(2), pp.445-452
description: Byline: A.D. Ribas, E.M. Del Ponte, A.M. Dalbem, D. Dalla-Lana, C. Bundchen, R.K. Donato, H.S. Schrekker, A.M. Fuentefria Keywords: fungicides; Fusarium graminearum ; imidazolium salts; inhibition; wheat Abstract Aims Evaluate the in vitro effect of imidazolium salts (IMS) on the conidia germination and mycelial growth of Fusarium graminearum and their in vivo efficacy for suppressing the symptoms of the disease and infection of kernels in wheat plants. Methods and Results The minimum inhibitory concentrations (MIC) of three IMS (C.sub.16MImCl, C.sub.16MImMeS and C.sub.16MImNTf.sub.2) were determined for four F. graminearum isolates using serial broth dilution method. The MICs found for all IMS were either 3ae12 or 6ae25 I1/4g ml.sub.-1 across the isolates, with the former as the most frequent. In the mycelial growth assay on potato dextrose agar media, only the C.sub.16MImCl among the IMS reduced 50% of mycelial growth of one isolate at an estimated concentration of 0ae32 mg ml.sub.-1. The time-kill curves showed a strong fungicidal effect starting 1 h after incubation at a concentration of 12ae5 I1/4g ml.sub.-1, representing a fourfold increase in the most frequent MIC. The C.sub.16MImCl sprayed onto the spikes of potted wheat plants during the flowering stage reduced disease intensity at levels comparable to the commercial fungicide when applied preventatively (1 h prior to fungal inoculation), rather than curatively, and at the higher dosage (2 mg ml.sub.-1) rather than lower dosage (0ae5 mg ml.sub.-1). Conclusions C.sub.16MImCl proved to be a potent inhibitor of F. graminearum growth and provided good levels of control of the disease at levels comparable to a commercial fungicide, in wheat plants treated prior to fungal infection during flowering stages. Significance and Impact of the Study This study suggests the potential of using IMS as alternative to the hazardous standard fungicides in the management of Fusarium head blight of wheat.
language:
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identifier: ISSN: 1364-5072 ; E-ISSN: 1365-2672 ; DOI: 10.1111/jam.13125
fulltext: fulltext
issn:
  • 1364-5072
  • 13645072
  • 1365-2672
  • 13652672
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titleImidazolium salts with antifungal potential for the control of head blight of wheat caused by Fusarium graminearum
creatorRibas, A. D. ; Del Ponte, E. M. ; Dalbem, A. M. ; Dalla‐Lana, D. ; Bündchen, C. ; Donato, R. K. ; Schrekker, H. S. ; Fuentefria, A. M.
ispartofJournal of Applied Microbiology, August 2016, Vol.121(2), pp.445-452
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subjectFungicides ; Fusarium Graminearum ; Imidazolium Salts ; Inhibition ; Wheat
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descriptionByline: A.D. Ribas, E.M. Del Ponte, A.M. Dalbem, D. Dalla-Lana, C. Bundchen, R.K. Donato, H.S. Schrekker, A.M. Fuentefria Keywords: fungicides; Fusarium graminearum ; imidazolium salts; inhibition; wheat Abstract Aims Evaluate the in vitro effect of imidazolium salts (IMS) on the conidia germination and mycelial growth of Fusarium graminearum and their in vivo efficacy for suppressing the symptoms of the disease and infection of kernels in wheat plants. Methods and Results The minimum inhibitory concentrations (MIC) of three IMS (C.sub.16MImCl, C.sub.16MImMeS and C.sub.16MImNTf.sub.2) were determined for four F. graminearum isolates using serial broth dilution method. The MICs found for all IMS were either 3ae12 or 6ae25 I1/4g ml.sub.-1 across the isolates, with the former as the most frequent. In the mycelial growth assay on potato dextrose agar media, only the C.sub.16MImCl among the IMS reduced 50% of mycelial growth of one isolate at an estimated concentration of 0ae32 mg ml.sub.-1. The time-kill curves showed a strong fungicidal effect starting 1 h after incubation at a concentration of 12ae5 I1/4g ml.sub.-1, representing a fourfold increase in the most frequent MIC. The C.sub.16MImCl sprayed onto the spikes of potted wheat plants during the flowering stage reduced disease intensity at levels comparable to the commercial fungicide when applied preventatively (1 h prior to fungal inoculation), rather than curatively, and at the higher dosage (2 mg ml.sub.-1) rather than lower dosage (0ae5 mg ml.sub.-1). Conclusions C.sub.16MImCl proved to be a potent inhibitor of F. graminearum growth and provided good levels of control of the disease at levels comparable to a commercial fungicide, in wheat plants treated prior to fungal infection during flowering stages. Significance and Impact of the Study This study suggests the potential of using IMS as alternative to the hazardous standard fungicides in the management of Fusarium head blight of wheat.
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