Skip to main content

U.S. flag An official website of the United States government

Animal and Plant Health Inspection Service
U.S. Department of Agriculture
USDA FAQ's and resources about coronavirus (COVID-19).  LEARN MORE

Emerald Ash Borer Photo Gallery

Select an image to see a larger photo.

emerald ash borer After pupating within the ash host, EAB adults emerge in the Spring. Image: James Zablotny Ph.D.   close view of D-shaped exit holes Exit holes are sometimes found low in the tree trunk. Image: Gerald Wheeler
close up of breeding Soon after the adults emerge they mate and lay eggs. Image: Brian Sullivan   cracked bark Infested ash hosts may have cracked bark due to larval feeding damage to tissue. Image: Gerald Wheeler
adult emerald ash borers Females search bark for an appropriate place to lay their eggs. Image: Brian Sullivan   cracked bark In old or heavy infestations, cracks and split in the bark are external symptoms of EAB larval feeding. Image: Gerald Wheeler
EAB laying eggs Once found, female EABs lay eggs on bark. Image: Brian Sullivan   infested Ash trees Infested ash trees initially show yellowing leaves. Image: Gerald Wheeler
boring galleries EAB larvae are often found boring galleries near the bases of branches as this location provides them some protection from woodpecker predators. Image: Gerald Wheeler   tree without leaves As the infestation progresses, trees lose their leaves prematurely. Image: Gerald Wheeler
Tetrastichus uses its long egg-laying organ to drill through the bark to lay eggs inside EAB larvae. Image: Jonathan Lelito   thinning crowns Thinning crowns in ash trees are a suspect of possible EAB infestation. Image: Gerald Wheeler
larvae bore galleries Larvae bore galleries in the wood, pupate within these gallery spaces, and emerge through holes in the spring. Image: Gerald Wheeler   evidence of larval feeding Beneath the cracked bark, evidence of heavy larval feeding can be seen. Image: Gerald Wheeler
larvae bore galleries Here, an adult ready to emerge, can be seen within the wood tissue. Image: Gerald Wheeler   eAB on Ash tree An adult EAB lives less than 30 days after emergence.. Image: James Zablotny Ph.D.
Close view of gallery and exit hole Close view of gallery and exit hole. Image: Gerald Wheeler   EAB on a leaf The emerald ash borer thus far, is host specific; all 16 species of Ash are at risk for EAB. Image: Brian Sullivan
larval feeding Larval feeding, resulting in frass-packed galleries, can cause extensive damage to host. Image: Gerald Wheeler   EAB walking EAB have a distinctive iridescent green and copper color, and a bullet-shaped body typical of buprestid beetles. Image: James Zablotny Ph.D.
D-shaped holes The D-shaped exit hole matches the body contour of the EAB; a flat back and round underside. Image: Gerald Wheeler   EAB insect The bullet-shaped body of EAB is typical of beetles in the family Buprestidae. Image: S. Ellis
view of stripped bark This view of stripped bark illustrates the typical “D” shape of the exit hole. Image: Gerald Wheeler   EAB dorsal view Dorsal view of EAB. Image: James Zablotny Ph.D
trees bearing D-shaped exit holes Trees bearing D-shaped exit holes have been infested from the previous year. Image: Gerald Wheeler   ventral view of eab Ventral view of EAB. Image: James Zablotny Ph.D
D-shaped exit holes The D-shaped exit holes are small and may be obscured by the texture of the bark. Image: Gerald Wheeler   frontal view of EAB head Frontal view of EAB head. Image: S. Ellis
close-up of D-shaped exit holes Close view of D-shaped exit hole with bark partly removed. Image: Gerald Wheeler   EAB larva EAB larva. Image: S. Ellis
Female Spathius agrili parasitize EAB larvae by drilling through the bark and laying up to 20 eggs on its host. Image: Tracy Ayer   Oobius agrili injects its egg in the egg of an EAB, where it will hatch, grow and kill the host egg.  Image: Jian Duan
Female Spathius galinae targets EAB larvae. Its long egg-laying organ (ovipositor) enables the wasp to parasitize EAB larvae in larger, more mature ash trees that have thicker bark. Image: Jian Duan      
Complementary Content