Abstract

The objective of this study was to evaluate integrated pest management (IPM) practices among hop growers in relation to downy mildew. Forty-eight hop samples, originating from the Saaz hop growing region (Czech Republic) and harvested in 2018 and 2019 seasons, were analyzed using HPLC-HR-MS/MS and AAS methods. Of all the samples analyzed, residues of Ametoctradin, Azoxystrobin, Boscalid, Dimethomorph, Mandipropamid, and Pyraclostrobin, and residues of copper-based fungicides were found at levels ranging from 0.02 to 32 mg/kg and from 7 to 404 mg Cu/kg, respectively. Hierarchical clustering analysis (HCA) was applied to categorize the samples according to the fungicide treatment schemes used to control fungal plant pathogens. The data showed that (1) there was not one universal fungicidal sequence commonly used by all hop growers, and (2) that the sum of pesticide residues varied by more than two orders of magnitude, depending on the fungicide treatment scheme. This study suggests a new approach for evaluating Integrated Pest Management (IMP) practices used in hop-yards on the basis of post-harvest recognition of various fungicidal sequences.

摘要

本研究的目的是评估与霜霉病相关的啤酒花种植者的害虫综合治理 (IPM) 做法。使用 HPLC-HR-MS/MS 和 AAS 方法分析了来自 Saaz 啤酒花种植区（捷克共和国）并在 2018 年和 2019 年收获的 48 个啤酒花样品。在所有分析的样品中，氨甲环己胺、嘧菌酯、啶酰菌胺、烯虫吗啉、杀虫胺和唑菌胺酯的残留量以及铜基杀菌剂的残留量分别为 0.02 至 32 mg/kg 和 7 至 404 mg Cu/kg，分别。根据用于控制植物真菌病原体的杀真菌剂处理方案，应用层次聚类分析 (HCA) 对样品进行分类。数据表明 (1) 没有一种通用的杀真菌序列被所有啤酒花种植者普遍使用，(2) 根据杀菌剂处理方案的不同，农药残留总量相差超过两个数量级。这项研究提出了一种新方法，用于根据对各种杀菌序列的收获后识别来评估啤酒花场中使用的害虫综合治理 (IMP) 做法。