We have had scattered reports of crop injury from herbicides --often due to over- 

 lap, excessive applications last year, or inadequately cleaned tanks. Most cases 

 have not been serious. 



Some soybeans show mottling and necrotic spots and dying back of leaves caused by 

 atrazine residue on field ends or where the sprayer stopped. 



Lorox alone or in combination with Lasso has also caused some injury. That's part 

 of the Lorox "ball game" --soybean tolerance is narrow and rates must be carefully 

 selected and applications must be uniform to avoid injury. 



Some samples also suggest a slight amount of Treflan carryover injury to corn. Tops 

 appear drouthy, stunted, and reddish. Roots may be pruned or somewhat clubby. In 

 most cases , a chisel plow rather than a moldboard plow had been used resulting in 

 less dilution of the herbicide. Dry weather may also have slowed Treflan break- 

 down. Affected spots are usually limited to fields ends or places where the sprayer 

 stopped. 



We have also had a few cases of injury that suggest that atrazine was not resus- 

 pended and the spray tank thoroughly cleaned before the sprayer was used for a 

 soybean herbicide. 



READ THE LABEL AMD 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 Illi- 

 nois Natural History Survey. 



WEEDS: Ellery Knake and Marshal McG lamer y , Department of Agronomy. 



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



AG COMMUNICATIONS: Ray Woodis . 



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

 county Extension advisers, and others, in cooperation with the USDA Agricultural 

 Research Service, Plant Pest Control Branch. 



