Detection and sampling of emerald ash borer (Coleoptera: Buprestidae) infestations

2015 ◽  
Vol 147 (3) ◽  
pp. 290-299 ◽  
Author(s):  
Krista Ryall
Keyword(s):  
Early Detection ◽  
Cost Benefit Analysis ◽  
Spatial Scales ◽  
Management Strategies ◽  
Emerald Ash Borer ◽  
Signs And Symptoms ◽  
Agrilus Planipennis ◽  
Larval Feeding ◽  
Sampling Protocols ◽  
Tools And Techniques

AbstractEmerald ash borer, Agrilus planipennis Fairmaire (EAB) (Coleoptera: Buprestidae), has caused devastating levels of mortality to ash trees (Fraxinus Linnaeus, Oleaceae) in North America. Early infestations of this insect are extremely difficult to detect due to cryptic larval feeding and lack of obvious signs or symptoms of initial attack. Considerable research has been conducted to develop tools and techniques aimed towards providing early detection and delimitation of populations of this invasive species. Sampling tools and techniques include: (1) relating visual signs and symptoms to the presence of EAB infestations; (2) use of girdled trap-trees to increase captures of adults and subsequent larval densities; (3) sub-sampling protocols to detect larvae under the bark based on their within-tree distribution; (4) artificial traps baited with pheromones and/or host volatiles attractive to adult EAB; (5) biosurvellience using buprestid-hunting wasps; and (6) remote sensing techniques. Additional research modelling patterns of infestation at the landscape scale indicate very clumped or aggregated distributions, greatly increasing the difficulty of early detection across large spatial scales. Further research is still required to increase the efficacy and efficiency of early detection tools and techniques, including cost/benefit analysis of the various sampling options, increased understanding of patterns of initial infestation across the landscape, development of sampling programs for both detection and delimitation, and development of sequential sampling programs to estimate EAB density. This information will enable foresters to make informed decisions regarding management strategies against this devastating pest.

scholarly journals Challenges, tactics and integrated management of emerald ash borer in North America

2019 ◽  
Author(s):  
Deborah G McCullough
Keyword(s):  
North America ◽  
Integrated Management ◽  
Management Strategies ◽  
Emerald Ash Borer ◽  
Interspecific Variation ◽  
Agrilus Planipennis ◽  
Local Conditions ◽  
Ash Trees ◽  
Invasion Impacts ◽  
Individual Trees

Abstract Emerald ash borer (EAB) (Agrilus planipennis Fairmaire), discovered in southeastern Michigan, USA in 2002, has become the most destructive and costly invasive forest insect in North America. This phloem-boring beetle has also invaded Moscow, Russia and continued spread of EAB potentially threatens European ash (Fraxinus spp.) species. This review summarizes EAB life history, including interspecific variation in host preference, invasion impacts and challenges of detecting new infestations and provides an overview of available management tactics. Advances in systemic insecticides, particularly emamectin benzoate products applied via trunk injection, have yielded effective and practical options both to protect individual trees and to slow EAB population growth and ash decline on an area-wide basis without disrupting natural enemies. Economic costs of treating ash are substantially lower than removal costs, retain ecosystem services provided by the trees, reduce sociocultural impacts and conserve genetic diversity in areas invaded by EAB. Girdled ash trees are highly attractive to EAB adults in low-density populations and debarking small girdled trees to locate larval galleries is the most effective EAB detection method. An array of woodpeckers, native larval parasitoids and introduced parasitoids attack EAB life stages but mortality is highly variable. Area-wide management strategies that integrate insecticide-treated trees, girdled ash trap trees and biological control can be adapted for local conditions to slow and reduce EAB impacts.

Review of the emerald ash borer (Coleoptera: Buprestidae), life history, mating behaviours, host plant selection, and host resistance

2015 ◽  
Vol 147 (3) ◽  
pp. 252-262 ◽  
Author(s):  
Therese M. Poland ◽  
Yigen Chen ◽  
Jennifer Koch ◽  
Deepa Pureswaran
Keyword(s):  
Life History ◽  
Host Plant ◽  
Host Resistance ◽  
Management Strategies ◽  
Emerald Ash Borer ◽  
The United States ◽  
Agrilus Planipennis ◽  
Host Plant Selection ◽  
Plant Selection ◽  
Ash Trees

AbstractAs of summer 2014, the invasive emerald ash borer (EAB), Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), has become established in 24 states in the United States of America and has killed tens of millions of ash trees since its introduction into Michigan in the 1990s. Considerable research has been conducted on many aspects of EAB life history, natural history, ecology, and management strategies in an attempt to contain this devastating pest. In this article, we review the life history, mating behaviours, and host plant selection by EAB in North America as well as host resistance to EAB attack.

scholarly journals Incidence, Population Density, and Spatial Heterogeneity of Plant-Parasitic Nematodes in Corn Fields in Ohio

Plant Disease ◽  
2018 ◽  
Vol 102 (12) ◽  
pp. 2453-2464 ◽  
Author(s):  
Abasola C. M. Simon ◽  
Horacio D. Lopez-Nicora ◽  
Laura E. Lindsey ◽  
Terry L. Niblack ◽  
Pierce A. Paul
Keyword(s):  
Population Density ◽  
Spatial Scales ◽  
Management Strategies ◽  
Parasitic Nematodes ◽  
Growth Stages ◽  
Plant Parasitic Nematodes ◽  
Population Densities ◽  
Sampling Protocols ◽  
Corn Fields ◽  
Plant Parasitic

Soil samples were collected from 425 corn fields in 28 Ohio counties between growth stages V3 and V6 during the 2013 and 2014 growing seasons. Ten morphological groups of plant-parasitic nematodes, namely spiral, lesion, lance, dagger, stunt, pin, ring, stubby-root, cyst, and “tylenchids” (several genera morphologically similar to members of the subfamily Tylenchinae [NCBI Taxonomy] including Cephelenchus, Filenchus, Malenchus, and Tylenchus) were identified. Eight species belonging to six of these groups were characterized. Spiral, tylenchids, lesion, pin, lance, stunt, and dagger nematodes were detected in 94, 96, 80, 57, 48, 48, and 37% of the fields, respectively, whereas the stubby-root, cyst, and ring nematodes were present in fewer than 14% of the samples. Averaged across fields, the spiral, tylenchids, and pin nematodes had the highest mean population densities. For all groups, incidence and population density varied among counties, and in some cases, among soil regions and cropping practices. Both population parameters were heterogeneous at multiple spatial scales, with the lowest heterogeneity among soil regions and the highest among fields within county and soil region. Estimated variances at the soil region level were not significantly different from zero for most of the nematodes evaluated. Stunt and lance were two of the most variable groups at all tested spatial scales. In general, the population densities were significantly more heterogeneous at the field level than at the county level. Findings from this study will be useful for developing sampling protocols and establishing on-farm trials to estimate losses and evaluate nematode management strategies.

scholarly journals Evaluation of Ash Tree Symptoms Associated with Emerald Ash Borer Infestation in Urban Forests

2015 ◽  
Vol 41 (2) ◽  
Author(s):  
Anand Persad ◽  
Patrick Tobin
Keyword(s):  
Early Detection ◽  
Management Strategies ◽  
Emerald Ash Borer ◽  
Adult Emergence ◽  
Prior History ◽  
Proactive Management ◽  
Increased Risk ◽  
Ash Trees ◽  
History Of ◽  
Study Sites

The emerald ash borer (EAB), first discovered in North America in Michigan in 2002, continues to expand its distributional range. Early detection of EAB remains a major caveat in efforts to implement proactive management strategies. Past reports have shown that ash trees infested with EAB have an increased risk of branch failure and other symptoms associated with tree decline. Therefore, early detection efforts could be improved if a suite of tree symptoms—prior to visible signs of EAB infestation—can be identified. Researchers initiated a four-year study in Ohio, U.S. (2009– 2012) to investigate and document symptoms associated with the EAB–ash tree complex in urban sites. The prior history of EAB at the study sites ranged from ash trees with no visible evidence of infestation to those that were infested for more than two years. In trees shown to be recently colonized by EAB, visible signs of infestation, such as adult emergence holes, presence of EAB galleries, bark loss, and canopy loss were not always apparent. However, in EAB-positive trees, there was a significant tendency for the presence of cracks in scaffold branches, branch fractures within the upper canopy, and branch fractures specifically located closer to the union with the stem as opposed to at the branch tip or at the branch’s center of gravity. This study highlights tree symptoms associated with the initial colonization of EAB when host trees are still apparently healthy, which could greatly facilitate future detection efforts for EAB.

scholarly journals A Borer-Specific Assessment Scheme for Identifying Sentinel Trees to Delimit Invasive Borers in Urban Forests

2015 ◽  
Vol 41 (3) ◽  
Author(s):  
Gabriel Hughes ◽  
Clifford Sadof ◽  
Matthew Ginzel
Keyword(s):  
Early Detection ◽  
Urban Forest ◽  
Emerald Ash Borer ◽  
Agrilus Planipennis ◽  
Street Tree ◽  
Ash Trees ◽  
Pest Incidence ◽  
Specific Assessment ◽  
Wood Borer ◽  
Wood Boring

Aggressive insects like the emerald ash borer [Agrilus planipennis (Fairmaire)] (EAB) increasingly threaten the health of the urban forest. Early detection of exotic wood-boring pests is critical for rapid response efforts, and allows for effective management while populations are relatively low. During street tree inventories, arborists record subjective rankings of tree condition and pest incidence; however, the extent of insect attack is rarely quantified. Moreover, it is unknown how the assessment of tree vigor provided by city foresters during these inventories relates to the likelihood of wood-borer infestation. In this study, researchers developed a borer-specific tree vigor assessment scheme to rapidly evaluate street trees, and to identify when EAB populations begin to grow exponentially based on the health of the forest. This scheme incorporates common indicators of EAB attack, including canopy thinning and epicormic sprouts, as well as attack by common native wood-boring insects. This scheme was used to track the health of ash trees from 2010 to 2013 in one urban forest with advanced symptoms of EAB decline and one without (Indianapolis and Lafayette, Indiana, U.S., respectively). Trees declined more rapidly in Indianapolis where emergence holes from native borers were positively correlated with EAB in infested areas. Over the course of the study, first detections of EAB occurred on progressively weaker trees at both sites, suggesting that early detection of incipient EAB populations can be improved by surveying apparently healthy trees.

scholarly journals Resistance of European ash ( Fraxinus excelsior ) saplings to larval feeding by the emerald ash borer ( Agrilus planipennis )

2019 ◽  
Vol 2 (1) ◽  
pp. 41-46 ◽  
Author(s):  
David N. Showalter ◽  
Robert J. Saville ◽  
Elizabeth S. Orton ◽  
Richard J. A. Buggs ◽  
Pierluigi Bonello ◽  
...  
Keyword(s):  
Emerald Ash Borer ◽  
Agrilus Planipennis ◽  
Fraxinus Excelsior ◽  
Larval Feeding ◽  
European Ash

scholarly journals Container Wall Porosity and Root Pruning Influence on Swietenia mahogani Root Ball Architecture and Anchorage After Planting

2015 ◽  
Vol 41 (3) ◽  
Author(s):  
Edward Gilman ◽  
Maria Paz ◽  
Chris Harchick
Keyword(s):  
Early Detection ◽  
Management Strategies ◽  
Emerald Ash Borer ◽  
Adult Emergence ◽  
Prior History ◽  
Root Pruning ◽  
Proactive Management ◽  
Increased Risk ◽  
Ash Trees ◽  
Study Sites

The emerald ash borer (EAB), first discovered in North America in Michigan in 2002, continues to expand its distributional range. Early detection of EAB remains a major caveat in efforts to implement proactive management strategies. Past reports have shown that ash trees infested with EAB have an increased risk of branch failure and other symptoms associated with tree decline. Therefore, early detection efforts could be improved if a suite of tree symptoms—prior to visible signs of EAB infestation—can be identified. Researchers initiated a four-year study in Ohio, U.S. (2009– 2012) to investigate and document symptoms associated with the EAB–ash tree complex in urban sites. The prior history of EAB at the study sites ranged from ash trees with no visible evidence of infestation to those that were infested for more than two years. In trees shown to be recently colonized by EAB, visible signs of infestation, such as adult emergence holes, presence of EAB galleries, bark loss, and canopy loss were not always apparent. However, in EAB-positive trees, there was a significant tendency for the presence of cracks in scaffold branches, branch fractures within the upper canopy, and branch fractures specifically located closer to the union with the stem as opposed to at the branch tip or at the branch’s center of gravity. This study highlights tree symptoms associated with the initial colonization of EAB when host trees are still apparently healthy, which could greatly facilitate future detection efforts for EAB.

Delimitation and management of emerald ash borer (Coleoptera: Buprestidae): case study at an outlier infestation in southwestern New York State, United States of America

2013 ◽  
Vol 145 (5) ◽  
pp. 577-587 ◽  
Author(s):  
M.K. Fierke ◽  
M.C. Whitmore ◽  
C. Foelker ◽  
J.D. Vandenberg ◽  
J. Carlson
Keyword(s):  
United States ◽  
New York ◽  
Early Detection ◽  
United States Of America ◽  
New York State ◽  
Emerald Ash Borer ◽  
Agrilus Planipennis ◽  
Spatial Extent ◽  
York State

AbstractWe present a case study in which we developed an adaptive delimitation technique and implemented and evaluated management of emerald ash borer (EAB), Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), in the first infestation discovered in New York State, United States of America. Delimitation was accomplished using 106 girdled “sentinel” trees and management included girdling 18 clusters of trees as population “sinks” to attract EAB and concentrate larvae for removal. Weekly monitoring of traps hung in sentinel trees facilitated early detection of EAB on 12 trees and allowed deployment of additional sentinels and sinks. Sentinel trees were felled and debarked; 12 were positive for EAB larvae and the spatial extent of infestation estimated at ∼48 km2. Sinks nearest the infestation core had the highest numbers of larvae. Larval densities were significantly greater in girdled trees than in proximate ungirdled trees suggesting removal of girdled trees prior to the following year's emergence would lower local EAB densities. Sinks deployed in response to an EAB on a sentinel tree purple prism trap more than 0.6 km from the centre of the known infestation were negative for EAB indicating these would not be effective for managing an infestation of similar size and in similar habitats. This case study provides valuable information to land managers to facilitate delimitation and management of newly discovered EAB infestations.

Review of Prelabor Rupture of the Membranes: Pathophysiologic Concepts and Novel Therapeutic Strategies

2020 ◽  
Vol 16 ◽  
Author(s):  
Saadia Ghafoor
Keyword(s):  
Management Strategies ◽  
Signs And Symptoms ◽  
Cochrane Library ◽  
Main Body ◽  
Scientific Publications ◽  
Timely Diagnosis ◽  
Narrative Literature Review ◽  
Contemporary Management ◽  
Online Library ◽  
Novel Therapeutic Strategies

Background:: Prelabor rupture of membrane (PROM) refers to the breakage of fetal membranes before the onset of labor, resulting in the leakage of amniotic fluid. PROM affects approximately 3% and 8% of preterm and term pregnancies. Because of associated high maternal and perinatal mortality, correct and timely diagnosis together with effective management is highly recommended to prevent adverse fetal and maternal outcomes. Objective:: To provide an overview of the novel concepts in the understanding of PROM including etiology, pathophysiology, risk factors, complications, assessment, diagnostic modalities, and contemporary management strategies for PROM at preterm and term. Methodology:: This narrative literature review was conducted through a literature search using the Cochrane library and electronic databases including PubMed, Web of Science, Medline, Scopus, Crossref, Google Scholar, Wiley online library, ScienceDirect with specific search terms in scientific publications published from March 1980 to March 2020. Main Body:: Preterm PROM has the potential to cause prenatal morbidity and mortality. It is imperative to monitor the signs and symptoms of an impending infection due to the risk of infectious morbidity with PROM at preterm and preterm. PROM at preterm and term requires prompt diagnosis followed by an appropriate management strategy. Conclusion:: The correct and timely diagnosis of PROM is essential for efficacious management. Furthermore, it can reduce avoidable emergent health care visits and related costs in a clinical setting subjected to pregnancy with suspected PROM. Further studies are needed to fill the gaps in identifying better diagnostic predictive tools in high- risk pregnancies.

Larval Feeding: Mechanisms, Rates, and Performance in Nature

2018 ◽  
Keyword(s):  
Marine Invertebrates ◽  
Spatial Scales ◽  
Size Spectrum ◽  
Larval Feeding ◽  
Natural Habitats ◽  
Feeding Mechanism ◽  
Temporal And Spatial ◽  
And Performance ◽  
Bioenergetics Models ◽  
Many Particles

Larvae of many marine invertebrates must capture and ingest particulate food in order to develop to metamorphosis. These larvae use only a few physical processes to capture particles, but implement these processes using diverse morphologies and behaviors. Detailed understanding of larval feeding mechanism permits investigators to make predictions about feeding performance, including the size spectrum of particles larvae can capture and the rates at which they can capture them. In nature, larvae are immersed in complex mixtures of edible particles of varying size, density, flavor, and nutritional quality, as well as many particles that are too large to ingest. Concentrations of all of these components vary on fine temporal and spatial scales. Mechanistic models linking larval feeding mechanism to performance can be combined with data on food availability in nature and integrated into broader bioenergetics models to yield increased understanding of the biology of larvae in complex natural habitats.

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