Bug Scout 1981
Check for Cornborers
(Tom Turpin, Entomologist, Purdue University)
Don't worry, Bug Scout, it's much too pretty to be a cornborer!
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June 6, 1981

The European cornborer was discovered in the US in 1917.  Since its introduction on the East Coast, the insect has spread westward.  It is now present throughout the major corn growing regions.

The pest has two generations per year in Indiana.  Moths of the first generation normally lay eggs during June.  Second-generation oviposition occurs during August in most years.

The decision to treat corn for first-generation larvae should be based on field scouting.  Inspect corn after it reaches 25 in. in height.  Stretch out the tallest leaf to measure.  If more than 50% of the plants show leaf feeding and live larvae are present, treat with a different insecticide.

Check your corn in June for potential damage.  This is a good way to keep from being caught with plants down at harvest.

by Tom Turpin, Entomologist, Purdue University

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