The potato psyllid, Bactericera cockerelli (Šulc), is a major pest of potato (Solanales: Solanaceae) as a vector of ‘Candidatus Liberibacter solanacearum’ (Lso). Bactericera cockerelli colonizes potato from noncrop host plants, yet we do not yet know which noncrop species are the primary sources of Lso-infected psyllids. The perennial weed, Physalis longifolia Nutt., is a high-quality host for B. cockerelli and Lso under laboratory conditions but has been overlooked in recent field studies as a source of Lso-infected psyllids. Our current study had four objectives: 1) determine whether P. longifolia is abundant in potato-growing regions of Washington and Idaho, 2) determine whether stands of P. longifolia harbor B. cockerelli and Lso, 3) identify the psyllid haplotypes occurring on P. longifolia, and 4) use molecular gut content analysis to infer which plant species the psyllids had previously fed upon prior to their capture from P. longifolia. Online herbaria and field searches revealed that P. longifolia is abundant in western Idaho and is present at low densities in the Columbia Basin of Washington. Over 200 psyllids were collected from P. longifolia stands in 2018 and 2019, confirming that B. cockerelli colonizes stands of this plant. Gut content analysis indicated that a proportion of B. cockerelli collected from P. longifolia had arrived there from potato. Confirmation that P. longifolia is abundant in certain potato-growing regions of the Pacific Northwest, and that B. cockerelli readily uses this plant, could improve models to predict the risk of future psyllid and Lso outbreaks.

中文翻译：

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爱达荷州西部马铃薯产区的公鸡（半翅目：Triozidae）与多年生杂草酸浆（茄目：茄科）的关联

马铃薯木虱，Bactericera cockerelli (Šulc)，是马铃薯 (茄目：茄科) 的主要害虫，是'Candidatus Liberibacter solanacearum' (Lso) 的载体。Bactericera Cockerelli 从非作物寄主植物中定殖马铃薯，但我们还不知道哪些非作物物种是 Lso 感染木虱的主要来源。多年生杂草 Physalis longifolia Nutt. 在实验室条件下是 B.cockerelli 和 Lso 的优质宿主，但在最近的实地研究中被忽视为 Lso 感染木虱的来源。我们目前的研究有四个目标：1）确定 P. longifolia 在华盛顿和爱达荷州的马铃薯种植区是否丰富，2）确定 P. longifolia 的林分是否含有 B. Cockerelli 和 Lso，3）确定发生在P. longifolia，4) 使用分子肠道含量分析来推断木虱在从 P. longifolia 捕获之前曾以哪些植物物种为食。在线植物标本馆和实地搜索表明，长叶杨在爱达荷州西部很丰富，并且在华盛顿哥伦比亚盆地以低密度存在。2018 年和 2019 年从 P. longifolia 林分中收集了 200 多株木虱，证实了 B.cockerelli 在这种植物的林分上定殖。肠道含量分析表明，从 P. longifolia 采集的 B. Cockerelli 有一部分是从马铃薯到达那里的。确认 P. longifolia 在太平洋西北部的某些马铃薯种植区很丰富，并且 B. Cockerelli 很容易使用这种植物，可以改进模型来预测未来木虱和 Lso 爆发的风险。