Matt O'Neal talks with Amy Asmus of Asmus Farm Supply to discuss outbreaks of aphids in cornfields around north-central Iowa. The two discuss what species of aphids are in corn and what impact they may have. Be prepared for more questions than answers as the scientist and crop consultant compare notes about this problem. For a more complete description of the aphids see Dr. Erin Hodgson's article in the Integrated Crop Management Newsletter (www.extension.iastate.edu/CropNews/2009/0807hodgson.htm)
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What concerns me, though, are
What concerns me, though, are reports that the appearance of this disease is not always fitting the typical pattern. Commonly, Gibberella ear rot attacks from the ear tip downward, whereas Diplodia ear rot usually progresses from the base of the ear upward. That helps distinguish these ear rots in the field. Plus, while both diseases produce a moldy growth, the moldy growth of Gibberella is normally a pinkish to whitish-pink color, whereas there is no pink color in the moldy growth of Diplodia. However, some of the cases of Gibberella from the northern states are reportedly looking like Diplodia—moldy growth from the bottom of the ear, with very little to no pink color.
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Mesa pest control