No. 21 Article 3/August 18, 2006

Insect Quick Notes

In an article titled "Insect Reminders" in last week's issue (no. 20, August 11, 2006) of the Bulletin, I indicated that scouting for western bean cutworms should either continue or commence, depending on scouting efforts thus far. Once again, we believe it is important to get a feel for levels of infestations in cornfields in 2006 so that plans for managing this pest can be made before 2007. Don't wait to be surprised at harvest time.


Hole drilled by a western bean cutworm larva into the side of a corn ear in Bureau County (photograph courtesy of Michael Michlig, Pioneer Hi-Bred International, Inc.)


Damage to corn ear tip caused by western bean cutworm larvae in Bureau County (photograph courtesy of Michael Michlig, Pioneer Hi-Bred International, Inc.)

I also want to remind you to watch for bean leaf beetles and green stink bugs in soybeans as you keep your eyes on soybean aphids. Kevin Black, insecticide/fungicide technical specialist with Growmark in Bloomington, recently reported that numbers of both pests are large in some fields in Illinois. Both of these insects can cause significant injury to soybean pods. An article written by Mike Gray in issue no. 18 (July 28, 2006) discusses both pests in some detail.--Kevin Steffey

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