equipment is much more effective than the old horse disc for controlling existing veg- 

 etation and may be adequate. Translocated herbicides, 2,4-D, and Banvel are not cur- 

 rently approved for such application, and cannot be recommended. There is a possibil- 

 ity of severe injury to soybeans- -especially from Banvel, depending on the rate, in- 

 terval between application and planting, temperature, and moisture conditions. 



Using such a herbicide where not approved might also result in illegal residue in the 

 crop. No one wants illegal residue in crops, and certainly not when soybeans are $10 

 a bushel. Paraquat is a possibiltiy for preplant use before corn or soybeans to con- 

 trol emerged weeds, but may only give a top kill of some of the weeds. 



WILL INCORPORATED HERBICIDES BE LOST FROM DRY SOIL? 



Not necessarily, and perhaps not as much as from wet soil. Some herbicides can be lost 

 by volatilization and photodecomposition (the effect of sunlight) . Soil that is very 

 cloddy and thus has a lot of air space in it may allow more of a loss. When the soil 

 is wet and when the air is dry and hot and the moisture is moving upward, there may be 

 an increased loss of some herbicides. Do the best you can to incorporate herbicides 

 such as Treflan, Sutan, and Vernam so they are in the soil and you are protected against 

 such loss. Then, let nature take its course. 



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. 



