-2- 



head, repellent sprays containing tabatrex or R-326 in conibination with pyrethrins. 

 Special face-fly-repellent sprays containing these materials are available and may 

 be used. About 60 to 70 percent reduction in the fly population can be expected 

 vlth these materials. 



For beef cattle, use a backrubber containing either 5 percent DDT or toxa- 

 phene in oil. Success with backrubbers will depend on whether the animals can smear 

 a liberal supply of the chemical on their heads. Backrubbers constructed with an 

 outer layer of canvas, burlap or cloth, as opposed to metal, would be best for this 

 purpose. Allow 30 days to elapse between this treatment and slaughter of the 

 animals. 



Picnic beetles : This shiny beetle is about l/k inch long with four yellow 

 spots on its back. These beetles are appearing in large numbers around the farm, 

 home and garden. They are scavengers feeding on fruits, vegetables and decaying 

 materials. They particularly like tomatoes, over- ripe fruits and ears of corn. 

 Home gardeners should use malathion for control in vegetable and fruit crops. Fol- 

 low the manufacturer's directions on the container. 



Special Note to Vegetable Growers : Small brown sap beetles are appearing 

 in sweet corn fields that have been damaged by corn earworm and corn borer. Where 

 beetles are present, apply 1/2 pound of parathion or 1 pound of malathion per acre, 

 using proper procedures. 



Watch for corn borer egg- laying to start about August 1 in central Illinois 

 and by August 10 in northern Illinois. Second- generation corn borer numbers may 

 increase noticeably over last year. 



Caution : Before applying insecticides, read labels carefully and follow 

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

 insecticide residue hazards. 



********* 



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

 tension Service and DJLinois 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. 



HBP:mfb 

 7/22/60 



