Some major seed corn companies are now spraying their seed production fields by 

 lirplane on a regular 7- to 10-day schedule, using 2 pounds per acre of a maneb or 

 naneb plus zinc ion fungicide. Spraying is not recommended, however, for com- . 

 nercial hybrid fields because of the cost. 



]orn planted in rotation and continuous corn on clean-plowed ground have been infected 

 Less by leaf blights. Good soil preparation, proper fertility, and drainage should be 

 practiced, for stress factors are known to increase severity of yellow leaf blight, 

 fellow leaf blight may be controlled by the same fungicides used to check northern 

 md southern leaf blights, though control is generally not practiced except by seed 

 producers . 



]apsule summary : Leaf blights can now be found in practically all corn fields in 

 Qlmois. How severe these blights become will be determined largely by weather 

 zonditions during the next several weeks. 



SPECIAL NOTE TO COUNTY EXTENSION ADVISERS 



Ve now have a supply of self-addressed franked mailing tubes for use in sending us 

 Insect specimens. If you are in need of a supply of these mailing tubes, please let 

 as know. 



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. 



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

 \G COMMUNICATIONS: Del Dahl . 



[he 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. 



