Efficiency of a non-recycling postharvest fungicide drencher to enhance management of apple decay and food safety.

IF 4 2区 生物学 Q2 MICROBIOLOGY Frontiers in Microbiology Pub Date : 2024-12-19 eCollection Date: 2024-01-01 DOI:10.3389/fmicb.2024.1509368
Achour Amiri, Claire M Murphy, Gween A Hoheisel, Clayton L Haskell, Faith Critzer
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Abstract

Introduction: Recycling drenchers used to apply postharvest fungicides in pome fruit may spread microorganisms, i.e., plant and foodborne pathogens, that increase fruit loss and impact food safety.

Methods: A non-recycling field drencher (FD), which drenches unstacked bins of fruit, was compared to a commercial recycling packinghouse drencher (CPD) for fruit coverage, fungicide residues, postharvest diseases control and spread of plant pathogens, total coliforms and generic Escherichia coli. A mixture of fludioxonil (FDL) and thiabendazole (TBZ) was used in 2021, while pyrimethanil (PYR) was applied in 2022 to alternate fungicides.

Results: The overall spray coverage assessed with pyranine was not significantly different between the FD and CPD. The residue levels of FDL and TBZ were similar between the two methods on Honeycrisp apples at the top, middle, and the bottom of the bins, whereas the residue levels of PYR were significantly lower at the bottom of the bins treated through the FD. The density of plant pathogens and overall disease incidence were similar on apples drenched through both systems in 2021 and significantly lower in FD-treated apples in 2022. The incidence of blue mold, the most important postharvest disease caused by Penicillium spp., was significantly lower in apples treated through the FD in both years. The levels of total coliforms and generic E. coli were significantly higher in fungicide solutions collected from the CPD compared to the FD. Total coliforms increased significantly on apples treated via the CPD but not on apples treated through the FD.

Discussion: Findings from this study suggest that the new non-recycling drencher has potential as an alternative to recycling packinghouse drenchers in reducing the spread of plant and foodborne pathogens.

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简介:用于果树采后施用杀菌剂的回收淋洗机可能会传播微生物,即植物和食源性病原体,从而增加水果损失并影响食品安全:在水果覆盖率、杀菌剂残留、采后病害控制和植物病原体传播、总大肠菌群和普通大肠杆菌方面,对非循环型田间淋洗器(FD)和商业循环型包装车间淋洗器(CPD)进行了比较。2021 年使用了氟啶虫腈(FDL)和噻菌灵(TBZ)的混合物,2022 年使用了嘧菌酯(PYR)来替代杀菌剂:使用吡蚜酮评估的总体喷洒覆盖率在 FD 和 CPD 之间没有显著差异。两种方法在蜂蜜脆苹果的顶部、中部和底部的 FDL 和 TBZ 残留水平相似,而在通过 FD 处理的箱底,PYR 的残留水平明显较低。2021 年,通过这两种系统淋洗的苹果上的植物病原体密度和总体病害发生率相似,而 2022 年,通过杀虫剂处理的苹果上的植物病原体密度和总体病害发生率明显较低。蓝霉病是由青霉属引起的最重要的采后病害,这两年经脱水处理的苹果发病率都明显较低。从 CPD 收集的杀真菌剂溶液中,总大肠菌群和普通大肠杆菌的含量明显高于 FD。通过 CPD 处理的苹果总大肠菌群明显增加,而通过 FD 处理的苹果总大肠菌群没有增加:本研究结果表明,新型非循环淋洗器有可能替代循环包装车间淋洗器,减少植物和食源性病原体的传播。
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来源期刊
CiteScore
7.70
自引率
9.60%
发文量
4837
审稿时长
14 weeks
期刊介绍: Frontiers in Microbiology is a leading journal in its field, publishing rigorously peer-reviewed research across the entire spectrum of microbiology. Field Chief Editor Martin G. Klotz at Washington State University is supported by an outstanding Editorial Board of international researchers. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers, academics, clinicians and the public worldwide.
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