<i>Geosmithia morbida</i>, Thousand Cankers Disease of Black Walnut Pathogen, Was Found for the First Time in Southwestern Ohio

Fig. 1 (C). Peeled walnut branch showing discolored phloem/small cankers (arrows) from which Geosmithia morbida was isolated.



Image from Plant Health Progress article:
Geosmithia morbida, Thousand Cankers Disease of Black Walnut Pathogen, Was Found for the First Time in Southwestern Ohio