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Western
corn rootworms
in first-year corn
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[OCT.
6, 2003]
Logan County has
been on the fringe of an area that has seen damage from corn
rootworms on first-year corn following soybeans. What this means for Logan County is that some plants showed some
damage, but entire fields didn't meet the threshold for treatment.
Dr. Kevin Steffey has recommended insecticide use on first-year corn
for the past two growing seasons for Logan County fields, based on
data from the prior years. I'm sure this year will not change that
recommendation. Official root ratings by county are now published at
http://www.ag.uiuc.edu/cespubs/pest/articles/images/200323table1.html.
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In the comparison from 2002 to
2003, the average plant damage may have been less severe in 2003.
However, a much larger percentage of plants were damaged. Until corn
with rootworm resistance is accepted for sale to Europe, the most
popular strategy will continue to be the use of a planting-time soil
insecticide. The seed-applied materials continue to have high
interest, and the current U of I research regarding rootworm control
can be found at
http://www.ag.uiuc.edu/cespubs/pest/
articles/images/200322table4.html.
Logan County has continued to
be out of the mainstream in regard to Western corn rootworm damage
in first-year corn, but the "defenses are weakening." Producers need
to carefully weigh the information available for damage and
available remedies in order to make an informed decision about seed
and pesticide orders for the coming year.
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this article]
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Commercial corn plot harvested
The
Logan County Commercial Corn Plot was harvested on Friday. Complete
information is still being compiled, but yields ranged from the 170s
to over 225 bushels per acre. Moisture levels were between 15.3
percent and 18.2 percent. Thanks go to the cooperating companies,
Scott Wurth family, State Bank of Lincoln, Fort Trust Farms and
others involved in the plot this year. Watch this space for a
complete report of yield information for the 32 hybrids involved in
the plot this year.
[John
Fulton]
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