not adequately control large weeds, such as early germinating smartweed and giant rag- 

 weed (horseweed) . Be prepared to apply herbicides if these get an early start. 



Minimum herbicide rates . Minimum tillage limits the thoroughness of preplant herbi- 

 cide incorporation. ThTis is not the year to try minimum herbicide rates, except per- 

 haps on poor-quality soybean seed where slow emergence may increase the possibility of 

 injury. 



Herbicide application . In the rush to catch up, don't get sloppy about herbicide ap- 

 plication and incorporation. Sutan, Eptam, and Vemam all require immediate incorpora- 

 tion. Accurate and uniform herbicide application is necessary in order to minimize the 

 potential for herbicide injury or carryover. If you are considering aerial application 

 don't forget the potential for drifting spray particles to contact trees, shrubs, and 

 lawns. 



Preplanting . If you want to retain the option of replanting from corn to soybeans, you 

 must consider both herbicide and insecticide applications. Some herbicides are cleared 

 for use with corn and soybeans while others have limited residual activity, reducing 

 the likelihood of injury. However, some herbicides persist long enough to seriously in 

 jure soybeans. If you decide to use a postemergence application on corn (to leave the 

 preplant option for soybeans open), don't forget that timely application is necessary 

 to control annual grasses. 



Weed control on winter wheat . Winter wheat should be sprayed with 2,4-D before the boot 

 stage (the head can be felt in the stem) or with Banvil before the node stage (the nodes 

 begin to form on the stem). Banvil works better on smartweed and wild buckwheat; but 

 2,4-D works better on mustards, such as yellow rocket. 



READ THE LABEL AND FOLLOW ALL PRECAUTIONS 

 This weekly report was prepared as follows: 



INSECTS: H.B. Petty, Steve Moore, Roscoe Randell , Don Kuhlman, and Tim Cooley , College 

 of Agriculture , University of Illinois at Urbana-Champaign , and the Illinois Natural 

 History Survey. 



WEEDS: Ellery Knake and Marshall McGlamery , Department of Agronomy , and A.J. Turgeon, 

 Department of Horticulture. 



PLANT DISEASES: M.C. Shurtleff, Ed Burns, and Tim Bowyer , Department of Plant Pathology 



AG COMMUNICATIONS: Don Button. 



AG ENGINEERING: John C. Siemens. 



The information for this report was gathered by these people, staff members, county Ex- 

 tension advisers, and others, in cooperation with the USDA Animal and Plant Health In- 

 spection Service. 



