Estimating local spread of recently established emerald ash borer, Agrilus planipennis, infestations and the potential to influence it with a systemic insecticide and girdled ash trees

Mercader, Rodrigo J.; McCullough, Deborah G.; Storer, Andrew J.; Bedford, J. M.; Heyd, Robert L.; Siegert, Nathan W.; Katovich, Steven; Poland, Therese M.

doi:10.1016/j.foreco.2016.02.005

Cited by 23 publications

(14 citation statements)

References 51 publications

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“…This speed is within the range of observed speeds between 0.4–0.7 km/yr in small infestations and 1.2–1.7 km/yr in larger infestations (Mercader et al. ). Over large scales, EAB has spread much faster, but this spread was almost certainly vectored by human transportation, which is not the focus of our work.…”

Section: Resultssupporting

confidence: 81%

“…In a homogeneously good landscape with the Laplace kernel to describe egg distribution, the population pulse travels at a speed of c h = 0.82 km/yr and the phloem density retreats at the same rate. This speed is within the range of observed speeds between 0.4-0.7 km/yr in small infestations and 1.2-1.7 km/yr in larger infestations (Mercader et al 2016). Over large scales, EAB has spread much faster,…”

Section: Resultssupporting

confidence: 75%

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Behavioral responses to resource heterogeneity can accelerate biological invasions

Lutscher

Musgrave

2017

Ecology

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The abundance and spatial distribution of resources in a landscape and the behavioral response of individuals determines whether and how fast an invasive species spreads in an environment. Whether and how landscape manipulations can be used to slow invasive species is of great interest, in particular in forest ecosystems, where tree removal, thinning, and increasing tree diversity are discussed as management options. Classically, the focus is on availability and accessibility of resources; more recent considerations include individual-level behavioral movement responses to a spatially heterogeneous resource distribution. We derive a novel model for insect-host dynamics that includes three common behavioral aspects of foraging: higher movement rate in resource-poor areas, lower ovipositioning rate in resource-poor areas, and movement preference for resource-rich areas. We show that each of these basic mechanisms can increase the speed of invasion in a source-sink landscape above that in a homogeneous landscape with larger overall resource availability. We parameterize our model and illustrate our results with data for emerald ash borer, a recent highly destructive forest pest in North America. Our results highlight the importance of empirical work on movement behavior in different landscape types and near the interface between types.

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Section: Resultssupporting

confidence: 81%

Section: Resultssupporting

confidence: 75%

Behavioral responses to resource heterogeneity can accelerate biological invasions

Lutscher

Musgrave

2017

Ecology

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“…In a recent 4-yr project encompassing 390 km 2 in northern Michigan, systematic grids of 444 to 855 small (10 to 20 cm dbh) girdled ash detection trees were deployed annually. Data acquired by debarking the girdled trees provided forest and city managers, regulatory officials and outreach specialists with extensive information on emerald ash borer distribution, density and spread across the landscape Mercader et al 2015Mercader et al , 2016. The debarked trees also functioned as population sinks, resulting in detectable effects on local emerald ash borer population growth (Mercader et al 2011.…”

Section: Discussionmentioning

confidence: 99%

Optimizing Use of Girdled Ash Trees for Management of Low-Density Emerald Ash Borer (Coleoptera: Buprestidae) Populations

Siegert

McCullough

Poland

et al. 2017

Journal of Economic Entomology

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Effective survey methods to detect and monitor recently established, low-density infestations of emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), remain a high priority because they provide land managers and property owners with time to implement tactics to slow emerald ash borer population growth and the progression of ash mortality. We evaluated options for using girdled ash (Fraxinus spp.) trees for emerald ash borer detection and management in a low-density infestation in a forested area with abundant green ash (F. pennsylvanica). Across replicated 4-ha plots, we compared detection efficiency of 4 versus 16 evenly distributed girdled ash trees and between clusters of 3 versus 12 girdled trees. We also examined within-tree larval distribution in 208 girdled and nongirdled trees and assessed adult emerald ash borer emergence from detection trees felled 11 mo after girdling and left on site. Overall, current-year larvae were present in 85-97% of girdled trees and 57-72% of nongirdled trees, and larval density was 2-5 times greater on girdled than nongirdled trees. Low-density emerald ash borer infestations were readily detected with four girdled trees per 4-ha, and 3-tree clusters were as effective as 12-tree clusters. Larval densities were greatest 0.5 ± 0.4 m below the base of the canopy in girdled trees and 1.3 ± 0.7 m above the canopy base in nongirdled trees. Relatively few adult emerald ash borer emerged from trees felled 11 mo after girdling and left on site through the following summer, suggesting removal or destruction of girdled ash trees may be unnecessary. This could potentially reduce survey costs, particularly in forested areas with poor accessibility.

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“…Model results indicated that emerald ash borer spread rates were reduced from areas with girdled trees. Trees treated with the systemic insecticide also reduced larval abundance in subsequent years (Mercader et al 2015(Mercader et al , 2016. The Pennsylvania Department of Agriculture has developed and implemented a pest management strategy to suppress the spotted lanternfly population focusing on the core of the infested area and working outward using the trap tree/host removal method as well as pesticide applications.…”

Section: Integrated Pest Management Programsmentioning

confidence: 99%

Management of Landscapes for Established Invasive Species

Poland

Juzwik

Rowley

et al. 2021

Invasive Species in Forests and Rangelands of the United States

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Long-term management strategies are invoked once an invasive species has become established and spread beyond feasible limits for eradication or containment. Although an invasive species may be well-established in small to large geographical areas, prevention of its spread to non-affected areas (e.g., sites, regions, and cross-continent) through early detection and monitoring is an important management activity. The level for management of established invasive species in the United States has increasingly shifted to larger geographical scales in the past several decades. Management of an invasive fish may occur at the watershed level in the western States, with watershed levels defined by their hydrologic unit codes (HUC) ranging from 2 digits at the coarsest level to 8 digits at the finest level (USGS 2018). Invasive plant management within national forests, grasslands, and rangelands can be implemented at the landscape level (e.g., Chambers et al. 2014), although management can still occur at the stand or base level. Landscapes in this chapter refer to areas of land bounded by large-scale physiographic features integrated with natural or man-made features that govern weather and disturbance patterns and limit frequencies of species movement (Urban et al. 1987). These are often at a large physical scale, such as the Great Basin.

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Estimating local spread of recently established emerald ash borer, Agrilus planipennis, infestations and the potential to influence it with a systemic insecticide and girdled ash trees

Abstract: Estimating local spread of recently established emerald ash borer, Agrilus planipennis, infestations and the potential to influence it with a systemic insecticide and girdled ash trees.

Cited by 23 publications

References 51 publications

Behavioral responses to resource heterogeneity can accelerate biological invasions

Behavioral responses to resource heterogeneity can accelerate biological invasions

Optimizing Use of Girdled Ash Trees for Management of Low-Density Emerald Ash Borer (Coleoptera: Buprestidae) Populations

Management of Landscapes for Established Invasive Species

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