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COLLEGE OF 







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AGRICULTURE 







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UNIVERSITY OF 



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ILLINOIS AT 

 URBANA CHAMPAIGN 

 AND NATURAL 

 HISTORY SURVEY 

 URBANA. ILLINOIS 



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INSECT WEED & PLANT DISEASE SURVEY BULLETIN 



STATE/COUNTY/LOCAL GROUPS/US. DEPARTMENT OF AGRICULTURE COOPERATING 



CORRECTION. . . CORRECTION. . . CORRECTION. . . CORRECTION 



There was an error in the June 16 "Insect, Weed and Plant Disease 

 Survey Bullet in" - -The "B" in 2,4-DB somehow got lost. 



The second paragraph on page 5 under POSTEMERGENCE HERBICIDE FOR 

 SOYBEANS should read this way: 



2,4-DB may be applied as a directed spray after soybeans are at least 

 eight inches high and if the weeds to be controlled are only about three 

 inches high. The spray should not contact more than the bottom third of 

 the soybean plants, and should not contact the growing terminals. Special 

 equipment should be used for directing the spray. If cocklebur forms a 

 canopy over soybeans, 2,4-DB may be broadcast once from ten days before 

 bloom to midbloom--when the soybeans are about knee-high. 



Soybeans treated with 2,4-DB may have a wilted appearance soon after 

 treating and may show increased stem cracking and lodging. Where cockleburs 

 are serious, the advantages may outweigh the disadvantages. 2,4-DB can also 

 give some control of giant ragweed and annual morning-glory. Spray only 

 where these weeds are actually present in the field. 



•30- 



6/19/72 



