2022
DOI: 10.1093/jofore/fvac007
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Characterizing Balsam Woolly Adelgid Infestations and Associated Tree Mortality in Idaho

Abstract: Balsam woolly adelgid, Adelges piceae (BWA), is a nonnative insect that has invaded much of the true fir range in North America, reducing host tree growth and causing mortality. Here, we describe a field study to characterize BWA infestation and effects on host trees in Idaho from the onset of infestation within twenty-eight sites with repeated surveys in 2008, 2013, and 2018. Declining tree health was categorized into five BWA damage classes based on the percent of the tree crown–expressing symptoms caused by… Show more

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Cited by 4 publications
(3 citation statements)
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“…This size dependency is however host and biotic‐agent species‐specific and can even shift between normal and outbreak conditions (Raffa et al ., 2008; Kolb et al ., 2016). While bark‐feeding insects may favour larger trees due to their thicker phloem, most pest insects (including bark beetles) preferentially attack smaller trees as they are often suppressed and hence have a lower defensive capacity (Boone et al ., 2011; Gaylord et al ., 2013; Nahrung et al ., 2014; Takagi et al ., 2018; Martinson et al ., 2019; Davis et al ., 2022). Taller trees have higher LMA (Fig.…”
Section: Potential Implications Of Tree Height On Vulnerability To Dr...mentioning
confidence: 99%
“…This size dependency is however host and biotic‐agent species‐specific and can even shift between normal and outbreak conditions (Raffa et al ., 2008; Kolb et al ., 2016). While bark‐feeding insects may favour larger trees due to their thicker phloem, most pest insects (including bark beetles) preferentially attack smaller trees as they are often suppressed and hence have a lower defensive capacity (Boone et al ., 2011; Gaylord et al ., 2013; Nahrung et al ., 2014; Takagi et al ., 2018; Martinson et al ., 2019; Davis et al ., 2022). Taller trees have higher LMA (Fig.…”
Section: Potential Implications Of Tree Height On Vulnerability To Dr...mentioning
confidence: 99%
“…The balsam woolly adelgid (Hemiptera: Adelges picea Ratzeburg; hereafter BWA) is an introduced insect that affects North American true firs (Abies spp. ), causing tree damage and mortality among all age classes [1]. Native to Europe, BWA entered North America in the early 1900s via separate introductions on the east [2] and west coasts [3].…”
Section: Introductionmentioning
confidence: 99%
“…Unlike these insects, which tend to produce relatively rapid and spatially clustered changes in forest canopy conditions and associated spectral responses, the complex spatiotemporal nature of BWA infestation has resulted in a relative paucity of remote-sensing-focused BWA studies. For example, tree health impacts from BWA infestation can unfold over the course of several years, and although mortality may be an eventual outcome, it is not guaranteed [1]. Furthermore, the spatially diffuse nature of infestation attributed to wind-driven insect dispersal increases the likelihood that a diverse range of infestation severities may be present even within a single satellite image pixel of moderate spatial resolution (e.g., 30 m), obscuring the stand-level spectral signal of infestation [16,32].…”
Section: Introductionmentioning
confidence: 99%