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STEWART'S BACTERIAL WILT AND LEAF BLIGHT 



Stewart's wilt is killing young corn seedlings in southern Illinois. The bacterium 

 which causes this disease is carried from plant to plant by corn flea beetles. Flea- 

 beetle populations have been variable, according to grower surveys. 



Streaks appear in the leaves and are light -yellow at first, then the streaks become 

 tan-colored as the leaf tissue dies. The streaks are parallel with the veins of the 

 corn leaf. 



All corn types are susceptible to Stewart's disease until the seedling has developed 

 three to four leaves. Older field corn plants generally have good resistance and are 

 not severely damaged. Write for RPD's 201 and 907 that describe Stewart's wilt in 

 greater detail. 



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 , 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. 



