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Sensitivity of fungi to urea, ammonium nitrate and their equimolar solution UAN  [2007]

Veverka, K.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic). Odbor Rostlinolekarstvi Stolcova, J.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic). Odbor Rostlinolekarstvi Ruzek, P.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic). Odbor Rostlinolekarstvi

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Abstract
The sensitivity of oomycota, saprophytic and pathogenic fungi to urea, ammonium nitrate and UAN (urea plus ammonium nitrate in equimolar solution) was studied in laboratory trials. The compounds were applied in agar in concentrations of 0.06, 0.19 and 0.6M. The most toxic was urea. Ammonium nitrate inhibited the growth of fungi only in higher concentrations. In contrast, the growth of Gaeumannomyces graminis was stimulated by even the highest concentration of 0.6M ammonium nitrate. The fungi most sensitive to urea and UAN were Alternaria tenuissima, Botrytis cinerea, Cladosporium cladosporioides and Pseudocercosporella herpotrichoides. No synergistic effect between the two compounds in UAN was found. Urea was toxic also to Colletotrichum acutatum which does not produce urease. Likewise, the urease inhibitor NBPT did not decrease the toxicity of urea to fungi.
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Other subjects

  • saprophytisme
  • inhibidores del crecimiento
  • experimentation en laboratoire
  • nitrato de amonio
  • inhibidores de la ureasa
  • colletotrichum
  • fusarium oxysporum
  • aspergillus niger
  • phoma exigua
  • uree
  • control quimico
  • penicillium
  • urea
  • inhibiteur de croissance
  • saprophytism
  • pleospora betae
  • leptosphaeria nodorum
  • pathogens
  • cladosporium cladosporioides
  • pseudocercosporella herpotrichoides
  • stemphylium
  • experimentacion en laboratorio
  • botrytis cinerea
  • pythium ultimum
  • pythium debaryanum
  • organismos patogenos
  • ammonium nitrate
  • trichoderma viride
  • fusarium solani
  • mucor
  • helminthosporium
  • agent pathogene
  • gibberella avenacea
  • gaeumannomyces graminis
  • nitrate d'ammonium
  • lutte chimique
  • saprofitismo
  • growth inhibitors
  • laboratory experimentation
  • alternaria
  • inhibiteur de l'urease
  • cercospora beticola
  • urease inhibitors
  • chemical control
  • rhizoctonia solani

From the journal

Plant Protection Science - UZPI (Czech Republic)

ISSN : 1212-2580

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