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Improvement of Candida sake biocontrol activity against post‐harvest decay by the addition of ammonium molybdate
Author(s) -
Nunes C.,
Usall J.,
Teixidó N.,
Viñas I.
Publication year - 2002
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1046/j.1365-2672.2002.01602.x
Subject(s) - molybdate , ammonium molybdate , biological pest control , ammonium , microbiology and biotechnology , chemistry , biology , botany , agronomy , inorganic chemistry , organic chemistry , fertilizer
Aim: To improve the efficacy of Candida sake by adding ammonium molybdate to control post‐harvest decay in Golden Delicious apples. Methods and Results: In laboratory trials, C. sake 2 × 10 6 cfu ml –1 plus 5 mmol l –1 ammonium molybdate greatly reduced Penicillium expansum , Botrytis cinerea or Rhizopus stolonifer in apples stored at 20°C for 7 days, and reduced by more than 90% blue and grey mould in apples stored at 1°C for 60 days. The consistency of these results was maintained in semi‐commercial trials at 1°C in air and in a low oxygen atmosphere for 120 days. The pre‐harvest application of C. sake 2 × 10 7 cfu ml –1 plus 1 mmol l –1 ammonium molybdate did not improve post‐harvest biocontrol of blue mould. The population of C. sake significantly decreased in the presence of ammonium molybdate in apple wounds. Conclusion: The addition of ammonium molybdate at 5 mmol l –1 to C. sake enhanced the efficacy of the antagonist to control post‐harvest diseases on apples. Significance and Impact of the Study: Ammonium molybdate significantly reduces the amount of C. sake biomass required to achieve post‐harvest disease control, with a consequent reduction in costs. This may be useful in the industrial production of C. sake .