生防酵母菌结合钼酸铵对冬枣采后主要病害防治的研究

Research on the Control of Postharvest Diseases of Winter Jujubes using Antagonistic Yeast in Combination with Ammonium Molybdate

研究美极梅奇酵母菌(Metschnikowia pulcherrima)与不同浓度(5、10、15、20 mmol/L)的钼酸铵结合使用对冬枣果实采后黑腐病和青腐病的防治效果以及钼酸铵对美极梅奇酵母菌生长的影响。结果表明,不同浓度的钼酸铵对美极梅奇酵母菌的生防效果影响不同,其中美极梅奇酵母菌与较低浓度(5 mmol/L)的钼酸铵溶液结合使用时对冬枣果实黑腐病和青腐病的防治效果最佳,美极梅奇酵母菌在含有5 mmol钼酸铵的NYDB液体和固体培养基以及冬枣伤口上的生长都未受到明显的抑制。因此,美极梅奇酵母菌与钼酸铵结合使用在控制冬枣采后贮藏中的病害方面具有潜在的应用价值。

Biological control efficacy of Metschnikowia pulcherrima in combination with different concentrations（5,10,15,20 mmol/L） of ammonium molybdate against postharvest diseases caused by Alternaria alternata and Penicillium citrinum in Winter jujubes was evaluated.And the effect of ammonium molybdate on the growth of M.pulcherrima was investigated.The results indicated that,different effects on biocontrol activity of M.pulcherrima for different concentration of ammonium molybdate.Combining M.pulcherrima with 5 mmol/L ammonium molybdate provided the most effective control of postharvest diseases.The addition of 5 mmol/L ammonium molybdate did not significantly influence growth of the yeast in vitro and in Winter jujube wounds.Therefore,it was appeared that antagonistic yeast in combination with ammonium molybdate had potential application value in postharvest diseases control of Winter jujubes.