Bexar County Entomology

Emerald Ash Borer Adult Photo Credit: Randy King You may have recently heard that a highly invasive beetle species is on the move in Texas.  The Emerald Ash Borer (EAB). Emerald Ash Borer is a green, metallic beetle of only about 1/3-1/2 inch in length.  They lay their eggs on host plants ash, fringe tree, and European Olive and are known to kill these trees.  Without management, they will spread throughout Texas and kill planted and native ash. Currently found in Bosque, Bowie, Cass, Camp, Cooke, Dallas, Denton, Grayson, Harrison, Hill, Hood, Hopkins, Marion, McLennan, Palo Pinto, Parker, Rusk, Tarrant, Titus, and Wise Counties, they are likely in other counties as well as it takes approximately two years of infestation before they become noticeable. Epicormic Shoots Photo Credit: Eric Lincoln Dieback of Canopy Photo Credit: Daniel Herms, The Ohio State University, Bugwood Symptoms of EAB include die back of top third of the canopy, epicormic shoots, serpentine or S shaped galleries u