Thousand-cankers disease, characterized by decline and dieback in tree crowns, can lead to the death of the high-value eastern black walnut. The disease was first found in 2010 within the native range of eastern black walnut in Knoxville, Tenn.. The disease is caused by numerous infections of the fungus Geosmithia morbida transmitted by walnut twig beetles during their mass attack of susceptible trees. Forest Service scientists, with partners at the University of Missouri and Purdue University, used stem-girdled "trap trees" to detect the walnut twig beetle and to determine what other insect pests and fungal pathogens colonize stressed walnut in Indiana and Missouri. No walnut twig beetles were obtained from either state. However, the canker fungus was detected on three adults of the bark-colonizing weevil Stenomimus pallidus obtained from two forest plantation trees on a site in Brown County, Ind. This site yielded 21 of the total 435 weevils obtained from 12 sites within the state. G. morbida detection also was attempted, but not found, from weevils from the other sites specimens of four ambrosia beetle species and one bark beetle species obtained from the Brown County trees. A state-issued quarantine has been imposed on this site.