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Diplodia
Ear Rot
initially appears as a white mold beginning at the base of the ear.
The mold and the kernels then turn grayish brown and rot the entire ear. A very
distinguishing characteristic is the appearance of raised black bumps (pycnidia)
on the moldy husk or kernels. Diplodia ear rot occurs most often in fields under
reduced tillage where corn follows corn.
Diplodia
Stalk Rot - (Stenocarpella (Diplodia)
maydis). This disease appears several weeks after silking when affected
plants die suddenly; the symptoms resemble frost injury. The lower stalk is
spongy and light to dark brown. Small dark-brown to black spots (pycnidia) may
develop just below the stalk epidermis near the nodes. Upon splitting the stalk,
disintegrated brownish pith is encountered.
 
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