- Emerald ash borer, Agrilus planipennis, is an invasive borer from northeast Asia threatening North American ash trees (Fraxinus).
- Life Cycle
- Females lay eggs 2 weeks after emergence. Eggs are initially light-yellow, turning to brownish-yellow before hatching. Eggs hatch in 1-2 weeks, and the tiny larvae bore through the bark and into the cambium and phloem. The creamy white larvae are 1–1.25 in. (2.5-3.2 cm) long with flat, broad, segmented bodies. Adults begin emerging in mid-June leaving 0.1–0.2 in. (0.25-0.5 cm) “D” shaped emergence holes. The life cycle in Michigan takes between 1-2 years depending on the climate. Larvae feed on phloem and make serpentine galleries that girdle and kill trees when the larval densities are high. Mature larvae tunnel into sap wood to pupate. In northern areas (e.g., Michigan), a single generation may require two years, but in mid-Atlantic states (e.g., Maryland), a generation can be completed each year.
- It was first detected near Detroit, Michigan and likely was introduced in the 1990s. It is now found in 14 other states and two Canadian provinces, and the infested range is expanding rapidly. Emerald ash borer attacks and kills healthy ash trees from ones several inches in diameter to mature trees. Massive mortality to ash of several species has occurred since the species' invasion in both landscape plantings and natural ash-dominated communities, especially in riparian areas.
- Control Efforts
- Three species of biocontrol have been researched and are currently being deployed. They include Spathius agrili (Hymenoptera: Braconidae), Oobius agrili (Hymenoptera: Encyrtidae), and Tetrastichus planipennisi (Hymenoptera:Eulophidae). This is a long-term management method rather than one targeted at immediate control. In dense populations, woodpeckers consume many larvae.
- Pest Alert - USDA Forest Service
- Misc. Forest Service Publication - USDA Forest Service
- Emerald Ash Borer: Research and Technology Development Meeting 2004 - USDA Forest Service
- Fact Sheet - Canadian Food Inspection Agency
- Emerald Ash Borer Home Page - USDA Forest Service
- North American Distribution Map 2004 - USDA Forest Service
- Native Range in Asia - USDA Forest Service
- National Emerald Ash Borer Information – USDA Forest Service -
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Invasive Listing Sources
- EDDMapS First Detector
- Everglades Cooperative Invasive Species Management Area
- Florida Invasive Species Partnership
- Great Lakes Early Detection Network
- Idaho Invasive Species Act
- Invasive Species of Concern in Georgia
- National Cooperative Agricultural Pest Survey Target Species - Program
- National Cooperative Agricultural Pest Survey Target Species - 2015
- New Hampshire Prohibited Invasive Species
- North American Forest Commission Exotic Forest Pest Information System
- Southeast Early Detection Network - Insects
- Wisconsin's Invasive Species Identification, Classification and Control Rule
Other System LinksITIS: 809502
NPDN Pest: INAHQJA
|Common Name Reference:||
Web Search - http://zipcodezoo.com/Animals/A/Agrilus_planipennis/|
|Scientific Name Reference:||BioLib - http://www.biolib.cz/en/taxon/id728412/|