Agassiz Research and Development Centre, Agriculture and Agri-Food Canada, Agassiz, BC, Canada.
Sentinel IPM Services, Chilliwack, BC, Canada.
Environ Entomol. 2021 Jun 18;50(3):663-672. doi: 10.1093/ee/nvab006.
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.
我们展示了 2004 年至 2019 年期间在艾伯塔省、萨斯喀彻温省和马尼托巴省进行的害虫钢丝虫综合调查的结果；这是自 Glen 等人（1943 年）以来对加拿大草原省份进行的首次此类调查。从观察到或怀疑有钢丝虫虫害的 571 个农田地点采集了样本，共鉴定出 5704 个标本（3548 个幼虫，2156 个甲虫）。大多数标本（96.9%）被鉴定为 Hypnoidus bicolor（3278 个）、Selatosomus aeripennis destructor（1280 个）、Limonius californicus（842 个）和 Aeolus mellillus（125 个）。这表明 H. bicolor 已取代 S. a. destructor 成为主要物种，而 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。尽管每个地点采集的标本数量相对较少（约 10 个），但 H. bicolor 和 S. a. destructor，以及 S. a. destructor 和 L. californicus 经常在同一地点或附近（在 1 公里内）被采集。我们提供了不同空间尺度的物种记录和共存发生率，讨论了物种组成变化的潜在原因和影响，物种共存对作物生产中钢丝虫害虫管理的影响，并概述了相关的研究需求。一种用于将主要物种的发病率与各种土壤特性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对钢丝虫的存在都有显著的特定物种影响。
