Abstract

Powdery mildew diseases on crops and ornamental plants are common and cause significant economic losses, by reducing the yield and quality of crops and downgrading the value of ornamentals. In surveys published annually in the Canadian Plant Disease Survey, powdery mildews were reported frequently. In recent years, the taxonomy of powdery mildew fungi has changed tremendously as the result of the increased application of molecular phylogenetic analyses. Several generic concepts have been re-adjusted. Many traditionally considered species turned out to be a complex of several phylogenetic species. In order to facilitate effective communication in the scientific community, it is important to apply the current correct names for field identifications. In this document, we summarize the powdery mildew fungi reported in the Canadian Plant Disease Survey from 2000 to 2019, address the taxonomic and nomenclatural issues associated with the listed species, and tentatively suggest correct names based on host plants wherever possible. Nevertheless, a reliable identification of the powdery mildew must depend on DNA sequence analyses and morphological examinations.

摘要

农作物和观赏植物的白粉病很常见，通过降低农作物的产量和质量，降低观赏植物的价值，造成重大的经济损失。在每年发表在加拿大植物病害调查中的调查中，白粉病频繁报道。近年来，随着分子系统发育分析应用的增加，白粉病真菌的分类发生了巨大变化。重新调整了几个通用概念。许多传统上认为的物种原来是几个系统发育物种的复合体。为了促进科学界的有效交流，重要的是应用当前正确的名称进行领域识别。在本文件中，我们总结了加拿大植物病害调查报告中的白粉病真菌从 2000 年到 2019 年，解决与所列物种相关的分类和命名问题，并尽可能根据寄主植物初步建议正确的名称。然而，对白粉病的可靠鉴定必须依赖于 DNA 序列分析和形态学检查。