European Journal of Plant Pathology

, Volume 128, Issue 2, pp 269–281 | Cite as

The effect of potential resistance inducers on development of Microdochium majus and Fusarium culmorum in winter wheat

  • Ingerd S. Hofgaard
  • Åshild Ergon
  • Birgitte Henriksen
  • Anne Marte Tronsmo


The effect of potential resistance inducing chemicals on disease development of Fusarium head blight was studied in winter wheat (Triticum aestivum L.). As a pre-screening test, the effect of different treatments on development of Microdochium majus (syn. Microdochium nivale var. majus) was studied in detached leaves. Based on these tests, DL-3-aminobutyric acid, Bion (benzo-(1,2,3) thiadiazole-7-carbothioic acid S-methyl ester), and a foliar fertilizer containing potassium phosphite were selected for further studies. Greenhouse-grown winter wheat was sprayed with aqueous solutions of the potential resistance inducers 7 days prior to Fusarium culmorum point inoculation of the heads. Disease development was registered as number of bleached spikelets per inoculated spike. Spraying plants with the foliar fertilizer reduced the disease severity of F. culmorum by up to 40%. A reduced disease development of M. majus was also observed in detached leaves pre-treated with the foliar fertilizer. When the foliar fertilizer was added to the growth medium, a reduced in vitro growth of M. majus and F. culmorum was observed, indicating that the effect on disease development is at least partly due to a fungistatic effect. No significant reduction in disease development was observed in wheat pre-treated with DL-3-aminobutyric acid or Bion, although these compounds tended to reduce disease development, especially when applied in combination with other potential resistance inducers. We conclude that spraying winter wheat with a solution containing potassium phosphite can reduce development of M. majus and F. culmorum.


Bion Detached leaf assay DL-3-aminobutyric acid Induced resistance Phosponate Potassium phosphite 



DL-3-aminobutyric acid


benzo-(1,2,3) thiadiazole-7-carbothioic acid-S-methyl ester


Fusarium head blight


induced systemic resistance



This work was supported by The Research Council of Norway.


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Copyright information

© KNPV 2010

Authors and Affiliations

  • Ingerd S. Hofgaard
    • 1
  • Åshild Ergon
    • 2
  • Birgitte Henriksen
    • 1
  • Anne Marte Tronsmo
    • 2
  1. 1.Plant Health and Plant Protection DivisionBioforsk, Norwegian Institute for Agricultural and Environmental ResearchÅsNorway
  2. 2.Department of Plant and Environmental SciencesNorwegian University of Life SciencesÅsNorway

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