Biocontrol of Postharvest Diseases of Jujube Fruit by Cryptococcus laurentii Combined with a Low Dosage of Fungicides Under Different Storage Conditions

Plant Disease
Guozheng Qin, Shiping Tian

Abstract

An antagonistic yeast, Cryptococcus laurentii, alone or in combination with a low dose of imazalil (25 μg a.i./ml) or kresoxim-methyl (50 μg a.i./ml), was investigated for its ability to control Alternaria alternata and Monilinia fructicola on jujube fruit under different storage conditions. Biocontrol activity of C. laurentii against A. alternata and M. fructicola at 20°C was enhanced significantly by combination with either fungicide. An integrated strategy for control of A. alternata and M. fructicola was developed that included a combination of C. laurentii, a low dose of fungicide, and controlled-atmosphere (CA) storage. Fruit treated with C. laurentii plus imazalil at 25 μg a.i./ml or kresoxim-methyl at 50 μg a.i./ml and stored in CA storage with 10% O2 + 0% CO2 at 0°C showed a lower disease incidence caused by both pathogens than fruit stored in air at 0°C. Application of imazalil (25 μg a.i./ml) or kresoxim-methyl (50 μg a.i./ml) did not inhibit the growth of C. laurentii in wounds of jujube fruit stored in air at 20 and 0°C or in CA at 0°C. The yeast grew rapidly in the wounds of jujube fruit under all storage conditions. The ability of C. laurentii to effectively control postharvest diseases of jujube fruit, the resis...Continue Reading

Citations

Aug 5, 2005·Annual Review of Phytopathology·D R Fravel
Nov 9, 2004·Yeast
Dec 18, 2020·Frontiers in Cellular and Infection Microbiology·Kasun M ThambugalaItthayakorn Promputtha

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