Goss's Bacterial Leaf Blight
Gail Ruhl, Sr. Plant Disease Diagnostician
The P&PDL has confirmed the first 2010 find of Goss's Bacterial Leaf Blight
on a sample of corn submitted from Pulaski county. The bacterium that causes
Goss's wilt and leaf blight of corn requires wounded tissue to infect
plants. Hailstorms, heavy rains, and windstorms earlier this season may have provided
plenty of wounded foliar tissue for infections to occur.
Please refer to
the Purdue Publication BP-81 (pdf file), 2008 What's Hot for additional information.
Click image to enlarge
Figure 1. Diagnostic lesions of Goss’s
wilt with dark specks or ‘freckles’ present in the
Figure 2. Bacterial ooze present on the lesion
surface will appear shiny in sunlight.
Figure 3. Blighted areas in the upper canopy
of infected plants.