Asian long-horned beetle

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Asian long-horned beetle
Aziatische-boktor.jpg
Not evaluated (IUCN 3.1)
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Coleoptera
Family:
Cerambycidae
Subfamily:
Lamiinae
Tribe:
Monochamini
Genus:
Anoplophora
Species:
A. glabripennis
Binomial name
Anoplophora glabripennis
(Motschulsky, 1853)
Synonyms

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File:Anoplophora glabripennis1.jpg
Closeup of Anoplophora glabripennis

The Asian long-horned beetle (Anoplophora glabripennis), also known as the starry sky, sky beetle, or ALB, is native to eastern China, Japan, and Korea. This species has now been accidentally introduced into the United States, where it was first discovered in 1996,[1] as well as Canada, Trinidad, and several countries in Europe, including Austria, France, Germany, Italy and UK. This beetle is believed to have been spread from Asia in solid wood packaging material.

Taxonomy and description

Common names for Anoplophora glabripennis in Asia are the starry sky beetle, basicosta white-spotted longicorn beetle, or smooth shoulder-longicorn, and it is called the Asian long-horned beetle in North America.[2]

Asian long-horned beetle adult anterior view

Adults are very large insects with bodies ranging from 1 to 1.5 cm (0.39 to 0.59 in) in length and antennae which can be as long as 4 cm (1.6 in) or 1.5–2 times longer than the body of the insect.[2] They are shiny black with about 20 white spots on each wing cover and long antennae conspicuously banded black and white. These beetles can fly, but generally only for short distances, which is a common limitation for Cerambycidae of their size and weight. The upper sections of the legs of the adults are whitish-blue. A. glabripennis can be distinguished from related species by the markings on the wing covers and the pattern of the antennae.[2]

Range and habitat

Asian long-horned beetle is native to eastern Asia, primarily in eastern China, Korea, and Japan. It is invasive outside its native range.

In its native range, A. glabripennis primarily infest trees maple, poplar, willow , and elm. In the United States, ALB has completed development on species of these genera and also Aesculus, Albizia, birch, katsura, ash, planes, and Sorbus. In Canada, complete development has been confirmed only on maple, birch, poplar, and willow, although oviposition has occurred on other tree genera. Maple is the most commonly infested tree genus in North America, followed by elm and willow. In Europe, complete development has been recorded on maple, Aesculus, alder, birch, hornbeam, beech, ash, planes, poplar, Prunus, willow, and Sorbus. The top five host genera infested in Europe, in decreasing order, are maple, birch, willow, Aesculus, and poplar. Not all poplar species are equally susceptible to ALB attack.[3]

First detections of asian long-horned beetle in North America as of July 2, 2015.

In North America, established populations were first discovered in August 1996 in Brooklyn, New York and has since been found in other areas of New York, New Jersey, Massachusetts, Illinois, Ohio, and Ontario in Canada.[4] However, it has also been eradicated from some regions within these states and provinces.[2][5][6][7][8]

Established populations have also been found in Europe in Austria, Belgium, England, France, Germany, Italy, Switzerland, and the United Kingdom.,[2] though the beetle has also been intercepted in areas it has not established through inspection of international trade goods such as wood packaging.[9][10][2][11]

Life cycle

Adult females lay 45–62 eggs in their lifetime by chewing a small pit through the bark of the host tree to the cambium and lay one 5–7 mm (0.20–0.28 in) long egg underneath the bark in each pit. Eggs hatch in 13–54 days depending on temperature. Eggs that have not developed enough, such as those laid in late summer or early fall, will overwinter and hatch the following season. Larvae are cylindrical and elongate and can be 50 mm (2.0 in) long and 5.4 mm (0.21 in) wide. Larvae first create a feeding gallery in the cambial region, but more mature larvae tunnel to the heartwood as they feed. Larvae go through at least five instars over 1–2 years; which can vary due to host or temperature conditions. Larvae expel frass from their tunnels near the original oviposition site. Asian long-horned beetle larvae do not pupate before they reach a critical weight, so additional larval instars can occur. Pupation usually occurs in spring at the end of the larval tunnel in the sapwood, eclosion occurs 12–50 days later, and adults will chew out of the tree approximately one week after eclosion.[2] Adults feed on leaf petioles and can chew through bark on small branches to feed on the vascular cambium.[2]

File:Oviposition niche.tif
Egg-laying site chewed by the female Asian long-horned beetle.

Eggs, larvae or as pupae can overwinter within the tree. In their overwintering phase, A. glabripennis are inactive and development does not occur. They resume their life cycle when temperatures are above 10 °C (50 °F).[2][3]

Upon emergence, females can copulate, although an obligatory maturation period is required for feeding after emergence for ovarian maturation. Laboratory studies have estimated the female maturation period lasts 9–15 days.[12] Adult males have mature spermatozoa before emergence, and feeding is necessary only to sustain their normal activity.[13] Adults typically lay eggs on the plant they developed on during immature stages rather than colonizing new plants unless population density is high or the host plant is dead.[2] However, when they do disperse, they can travel up to approximately 2.5 km (1.6 mi) from their host tree in a growing season in search of new hosts, although in a mark-recapture experiment about 98% of adults were recaptured within 1 km (0.62 mi) of their release point.[2][13] Adult longevity and fecundity are influenced by conditions such as the larval host plant and temperature. Laboratory reared males and females can live up to 202 and 158 days, respectively.[2]

As an invasive species

Due to high tree mortality caused by larval feeding outside its native range, ALB can change both forest and urban ecosystems. In the United States, it can potentially destroy 30.3% of urban trees and cause $669 billion in economic loss. Early detection is used to manage infestations before they can spread.[2]

Monitoring

Tree infestation can be detected by looking for exit holes 3/8 to 3/4 inches in diameter (1–2 cm) often in the larger branches of the crowns of infested trees. Sometimes sap can be seen oozing from the exit holes with coarse sawdust or "frass" in evidence on the ground or lower branches. Dead and dying tree limbs or branches and yellowing leaves when there has been no drought also signal ALB infestation. United States Department of Agriculture (USDA) research indicates this beetle can survive and reproduce in most sections of the country where suitable host trees exist.

Workers in warehouses in CA, FL, IL, IN, MA, MI, NC, NJ, NY, OH, PA, SC, TX, WA, and WI in the United States, and in the Greater Toronto Area in Ontario, Canada.[14] After an aggressive containment program and with the last confirmed sighting in 2007, Canada declared itself free of the beetle on April 5, 2013 and lifted restrictions on the movement of tree materials.[15]

Quarantine

Quarantines have been established around infested areas to prevent accidental spread of ALB by people. The use of Solid Wood Packing Materials (SWPM) for maritime shipping is regulated for adequate treatment methods at certain ports.[16][17] US customs regulations were changed on September 18, 1998 to require wooden packing materials from China be chemically treated or kiln-dried to prevent further infestations of the Asian long-horned beetle from arriving. Pest inspection, new rules, and public awareness are the key steps to prevention of the spread of the Asian long-horned beetle.

File:Asian Long-horned Beetle Regulated Area Notice.jpg
The Canadian Food Inspection Agency is spearheading efforts to fight the ALB infestation in the Greater Toronto Area.

Removal and treatment

All infested trees are removed and chipped in place. The stumps of infested trees are ground to below the soil level. All tree removal is done by certified tree care personnel to ensure that the process is completed properly. New York and Chicago began this eradication process in 1997 with thousands of dollars in effort to complete the project.

Research is underway to determine the effectiveness of certain insecticides such as imidacloprid against ALB. Insecticidal treatments have begun in New York and Chicago in hopes of preventing and containing infestations. Chicago's program of imidacloprid treatments for healthy trees of potential host species within a one-eighth to one-half mile (200–800 m) radius of infested trees successfully removed Illinois from quarantine in August 2006. As of December 2006, New Jersey's policy was to cut down all healthy trees of the potential host species within a one-eighth to one-quarter mile (200–400 m) radius of infested trees.

Over 1,550 trees in Chicago have been cut down and destroyed to eradicate ALB from Chicago. In New York, over 6,000 infested trees resulted in the removal of over 18,000 trees; New Jersey's infestation of over 700 trees led to the removal and destruction of almost 23,000 trees,[18] but infested trees continue to be discovered.[19]

Eradication

In areas such as North America where infestations are small, ALB can potentially be eradicated.[2] As trees are removed or treated, all host trees on public and private property located within an established distance from an infested area are surveyed by trained personnel. Infested areas are re-surveyed at least once per year for 3–5 years after the last beetle or infested tree is found.

As of 2015, ALB has been eradicated from Islip, Manhattan, and Staten Island in New York, Jersey City in New Jersey, Chicago in Illinois, and Boston in Massachusetts. It was also declared eradicated in Toronto, Ontario, but it was re-discovered there in 2013.[2]

See also

References

  1. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ 3.0 3.1 Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ September 18, 2003 Asian Longhorned Beetle discovered in York Region
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  12. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  13. ↑ 13.0 13.1 Lua error in package.lua at line 80: module 'strict' not found.
  14. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  15. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  16. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  17. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  18. ↑ Newspaper Archive (dead link as of at least March 16, 2009)
  19. ↑ Lua error in package.lua at line 80: module 'strict' not found.

External links

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