We present findings of a general survey of pest wireworms in Alberta, Saskatchewan, and Manitoba conducted from 2004 to 2019; the first such survey of the Canadian Prairie provinces since that published by Glen et al. (1943). Samples were collected from 571 farmland locations where crop damage from wireworms was observed or suspected, and a total of 5,704 specimens (3,548 larvae, 2,156 beetles) were identified. Most specimens (96.9%) were identified as Hypnoidus bicolor (3,278), Selatosomus aeripennis destructor (1,280), Limonius californicus (842), and Aeolus mellillus (125). This suggests that H. bicolor has replaced S. a. destructor as the predominant species and that the relative importance of L. californicus as a pest species has increased since earlier reports. Despite the relatively small number of specimens collected per location (approx. 10), H. bicolor and S. a. destructor, and S. a. destructor and L. californicus were frequently collected at or near the same location (within 1 km). We provide species records and incidence of co-occurrence at different spatial scales, discuss potential reasons for and implications of shifts in species composition, implications of species co-occurrence for managing wireworm pests in crop production, and outline pertinent research needs. A path analysis approach used to correlate incidence of the main species with various soil characteristics indicated that organic matter, cation exchange capacity, and water retention capacity all had a significant species-specific influence on wireworm presence.

中文翻译：

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艾伯塔省、萨斯喀彻温省和曼尼托巴省（加拿大）害虫线虫（鞘翅目：Elateridae）物种的分布

我们介绍了 2004 年至 2019 年在阿尔伯塔省、萨斯喀彻温省和马尼托巴省进行的害虫线虫一般调查的结果；自 Glen 等人发表的调查以来，首次对加拿大草原省份进行此类调查。（1943 年）。从 571 个观察到或怀疑有线虫对作物造成损害的农田地点采集样本，共鉴定出 5,704 个样本（3,548 只幼虫，2,156 只甲虫）。大多数标本 (96.9%) 被鉴定为 Hypnoidus bicolor (3,278)、Selatosomus aeripennis destructor (1,280)、Limonius californicus (842) 和 Aeolus mellillus (125)。这表明 H. bicolor 已经取代了 S. a. destructor 作为主要物种，并且 L. californicus 作为害虫物种的相对重要性自早期报告以来有所增加。尽管每个地点收集的样本数量相对较少（大约 10)、H. bicolor 和 S. a. 析构函数和 S.a. destructor 和 L. californicus 经常在同一地点或附近（1 公里内）收集。我们提供不同空间尺度上的物种记录和共现发生率，讨论物种组成变化的潜在原因和影响，物种共现对管理作物生产中线虫害虫的影响，并概述相关的研究需求。用于将主要物种的发生率与各种土壤特征相关联的路径分析方法表明，有机质、阳离子交换能力和保水能力都对线虫的存在具有显着的物种特异性影响。我们提供不同空间尺度上的物种记录和共现发生率，讨论物种组成变化的潜在原因和影响，物种共现对管理作物生产中线虫害虫的影响，并概述相关的研究需求。用于将主要物种的发生率与各种土壤特征相关联的路径分析方法表明，有机质、阳离子交换能力和保水能力都对线虫的存在具有显着的物种特异性影响。我们提供不同空间尺度上的物种记录和共现发生率，讨论物种组成变化的潜在原因和影响，物种共现对管理作物生产中线虫害虫的影响，并概述相关的研究需求。用于将主要物种的发生率与各种土壤特征相关联的路径分析方法表明，有机质、阳离子交换能力和保水能力都对线虫的存在具有显着的物种特异性影响。