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

Fig. 2 (A). Geosmithia morbida sporulating on a walnut bark chip on ¼ PDA++ agar.



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