The Purdue Plant and Pest Diagnostic Laboratory

What's Hot at the P&PDL
August 31, 2012

Corn Ear Rots

Gail Ruhl, Sr. Plant Disease Diagnostician, Plant & Pest Diagnostic Lab

Over the past several weeks the PPDL has identified a number of different fungi associated with corn ear rots, including ears exhibiting Aspergillus flavus and Penicillium spp (Fig 1) Aspergillus niger and Penicillium spp (Fig 2), Nigrospora, Cladosporium and Trichoderma. Follow these links for information on Aspergillus ear rot (pdf file) and potential presence of mycotoxins visit.

Aflatoxin Detected in Fields in Central and Southern Iowa - Iowa State University

Managing Moldy Corn - Purdue Extension

Click image to enlarge

Figure 1. Aspergillus flavus (L) and Penicillium spp. (R)

Figure 2. Aspergillus niger (black) and Penicillium spp. (bluish-gray)

Purdue Plant & Pest Diagnostic Lab Purdue Cooperative Extension Service