Detection of emerald ash borer, Agrilus planipennis, at low population density
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The exotic emerald ash borer (EAB), Agrilus planipennis (Coleoptera: Buprestidae), was first discovered in North America in Detroit, MI, in 2002. This beetle has killed millions of ash trees in several states in the United States and in Canada, and populations of this insect continue to be detected. EAB is difficult to detect when it invades new areas or occurs at low density. For the foreseeable future, trap tree and ground surveys will be important tools for detecting emerald ash borer populations.Keywords:
Emerald ash borer
Agrilus
Population density
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Previous literature on the emerald ash borer (EAB) suggests that, in its native range in Asia, EAB will attack species other than ash (Fraxinus), including Ulmus sp. and Juglans sp. In North America, as ash trees die in the core zone of infestation, concern has been raised about the potential for species other than ash to act as a suitable host for this pest. If an alternate host species were to be discovered, the impact on forest resources would increase dramatically in North America.
Emerald ash borer
Agrilus
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The exotic emerald ash borer (EAB), Agrilus planipennis Fairmaire, was first identified in Michigan in 2002, though it had likely been established there for a number of years prior to detection. A key to management of EAB populations is the ability to detect this insect in order to accurately describe its distribution and to locate new outlier populations. A number of detection tools have been tested, and the mostly widely implemented to date has been the use of trap trees.
Emerald ash borer
Agrilus
Trap (plumbing)
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In 2015, emerald ash borer (EAB) was detected in North Louisiana (LA). There is no information on wood inhabiting insects of green ash (Fraxinus pennsylvanica Marshall) trees, phenology and parasitoid establishment in LA. The first objective of the study was to quantify the insect assemblages and to compare their diversity, abundance and evenness within the epicenter of the EAB infestations in North LA including regions in Central and South LA where EAB has not been detected yet. We established four treatments, based on log diameter: small and large; and log condition: dead and live for green ash. All the insects collected bimonthly from emergence traps were identified to family level. A total of 25, 420 insects belonging to 104 families and 11 orders were collected. Assemblages differed among live large trees (Wald test = 8.016, P < 0.01), which composed of greater percentages of Mycetophilidae (Diptera), Megaspilidae (Hymenoptera), Ceratopogonidae (Diptera), and Liposcelididae (Psocodea). Total abundance for live small logs was 11.5-times higher than live large, and 7.7-times higher than dead small logs at non- EAB 1 site due to niche differences. Shannon's diversity and evenness were found to be higher in dead small, live large, and live small logs at non-EAB 2 site. The potential changes to local ash bottomlands after the EAB invasion in LA are also discussed.
Emerald ash borer
Agrilus
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The emerald ash borer (EAB), Agrilus planipennis (Coleoptera, Buprestidae), is an invasive pest from Asia posing a serious threat to ash trees (Fraxinus spp.) in North America. Beetles have a 1- or 2-year life cycle completed entirely in association with ash trees. Since its discovery in 2002 near Detroit, MI, EAB has now spread over much of northeastern North America. Within these areas over 25 million trees have been killed.
Agrilus
Emerald ash borer
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Emerald ash borer (EAB) (Agrilus planipennis), an invasive buprestid native to northeast Asia, has killed tens of millions of ash (Fraxinus) trees in infested areas of eastern North America. EAB apparently arrived in infested solid wood packaging materials from China in the early 1990s near Detroit, MI, but was not identified as the cause of local ash mortality until 2002. At that time, very little was known about its biology, and there was no information on how to manage it. Since then, much progress has been made in evaluating control tactics for EAB including the use of insecticides and biological control.
Emerald ash borer
Agrilus
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Emerald ash borer (EAB), Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), is a devastating invasive pest of North American ash trees (Fraxinus spp.) that was first discovered outside of its native range of northeastern Asia in 2002 (Haack et al. 2002). With unintended assistance from human movement of infested ash material, EAB spread swiftly from its initial zone(s) of discovery in the Detroit, MI/Windsor, ON, metropolitan area and now can be found in 13 states in the United States and 2 provinces in Canada.
Emerald ash borer
Agrilus
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The objective of this project is to estimate the geographic origin of emerald ash borer (EAB) populations in Asia that gave rise to EAB in North America. Knowledge of EAB genetics will be useful in understanding the invasion dynamics of the beetle, and to help identify geographic localities of potential biocontrol agents.
Emerald ash borer
Agrilus
Emerald
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Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), the emerald ash borer (EAB), is native to China, Japan, Korea, Mongolia, Russian Far East, and Taiwan. In 2002, EAB was identified as the causative agent of extensive ash (Fraxinus spp.) mortality in southeastern Michigan and nearby southwestern Ontario. EAB was inadvertently introduced in solid wood packing materials or dunnage approximately 5-10 years ago, resulting in millions of dead and dying ash trees.
Emerald ash borer
Agrilus
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In 2002, the emerald ash borer (EAB), Agrilus planipennis, a buprestid beetle native to Northeast Asia, was discovered as the cause of extensive ash tree (Fraxinus spp.) mortality in southern Michigan and Ontario.
Emerald ash borer
Agrilus
Emerald
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Emerald ash borer
Agrilus
Population Genetics
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