Yellow spots in oat fields : Bacterial infection is causing yellow spots 

 to appear in oat fields. Although it resembles damage by greenbugs and yellow dwarf, 

 it is entirely different. No greenbugs have been observed in Illinois thus far. 



Caution ; Before applying insecticides, read labels carefully and follow 

 all precautions. This not only will insure personal safety, but also will eliminate 

 insecticide residue hazards. 



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This weekly report was prepared by H. B. Petty, Illinois Agricultural Ex- 

 tension Service and Illinois Natural History Survey, in cooperation with the USDA 

 Agricultural Service, Plant Pest Control Branch, from information gathered by ento- 

 mologists and cooperators who send in weekly reports from their own localities. 



5/27/60 



