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No. 22/September 06, 2002

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Lock in the Dates for the 2003 Crop Protection Technology Conference and the Corn and Soybean Classics
The dates for the Crop Protection Technology Conference are January 7 and 8, 2003, and it will be held at the Illini Union on the campus of the University of Illinois. Similar to last year's meeting, participants will be able to "tailor-make" their individual schedules for the 2-day conference.

The meeting dates and locations for the sixth annual Corn and Soybean Classic Meetings 2003 are listed in the article. These sessions have increased in popularity each year and are attended by producers as well as representatives of the agribusiness sector.

Preliminary Root-Rating Results from Insecticide Efficacy Trials Available
This article presents the preliminary root-rating results from the 2002 insecticide efficacy trials for DeKalb, Monmouth, and Urbana.

Don't Forget About Hessian Fly and Fly-Free Dates
Hessian fly adults emerge in late summer and early fall; the fly-free dates typically occur after peak emergence of the fly. By planting wheat after the fly-free date, the egg-laying females are not able to find a suitable host, so they die without laying a full complement of eggs.

We encourage all wheat growers to plant wheat in 2002 after the fly-free dates. Implementation of this cultural practice in 2002 could prevent economic losses in 2003.

Stalk Rot of Corn in Illinois
We have received questions concerning stalk rot of corn and whether it will be a major problem in Illinois this season. The extreme stresses put on corn this season in many parts of Illinois suggest that stalk rot may become a problem. Cornfields should be scouted now for stalk rot and decisions made regarding possible early harvest dates for fields at risk.

Plant Disease Report
Management of viral disease of wheat can be tricky business. There isn't anything out there to spray on the plants once they are infected to minimize the yield loss from virus infection. Management balances around avoidance, disease resistance through variety selection, and sanitation of secondary hosts.

Survey for PPO-Resistant Waterhemp Populations
Earlier this season, we reported confirming PPO-inhibitor resistance in a waterhemp population from western Illinois. Since that initial report, we have received several other anecdotal reports of PPO-inhibiting herbicides failing to control waterhemp. Not all of these reports have originated from western Illinois, however, and we are concerned that PPO-inhibitor resistance in Illinois waterhemp populations may be more widespread than initially perceived.

The Pest Management and Crop Development Bulletin
Executive Editor: Kevin Steffey, Extension Entomologist

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