CROPS NEWS
Pest Alert
Emily Unglesbee DTN Staff Reporter
Tue Jun 3, 2014 02:15 PM CDT

LAWRENCE, Kan. (DTN) -- Along with sunbathers and schoolchildren, the common stalk borer has been eagerly awaiting the long, warm days of summer.

As growing-degree days pile up in the Midwest, stalk borer larvae begin their annual trek from grassy birthplaces in ditches and fence rows to tunnel into young, alluring corn stalks. The injury most often associated with the pest is "dead heart" -- the result of tunneling in near the growing point while corn is in the V4-V8 stage. Most Bt hybrids only suppress this pest and growers can underestimate them as an adversary.

"About 10% of larvae ...

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