Plectosporium Blight (Microdochium Blight) of Pumpkin

Plectosporium blight (Microdochium blight) of pumpkin, caused by the fungus Microdochium tabacinum, was first reported in Tennessee in 1988.  It was subsequently reported from other pumpkin growing areas. In 2000, Plectosporium blight was observed in jack-o-lantern pumpkin fields throughout Illinois.  In some fields, yield losses to Plectosporium blight were estimated to be more than 50%.  It was the first report of Plectosporium blight in Illinois. In 2001, 2002, and 2003 Plectosporium blight was observed in few pumpkin fields, and with low incidence. For more information on Plectosporium blight of pumpkin, click here.