For beef cattle , apply a 0.5$ toxaphene water- diluted spray at 1 to 2 

 quarts per animal every three weeks. Allow 30 days to elapse "between treatment and 

 slaughter when using toxaphene. Thorough coverage of the animal is important for 

 effective results. Ciodrin 2.0$ in oil applied two or three times a week with an 

 automatic sprayer can also he used effectively. 



Horse flies were bothering cattle and horses in southern Illinois this 

 week. Most standard livestock sprays do poorly against this pest. The only material 

 that has been effective in Illinois is an 0.5$ pyrethrin spray, 1 to 2 ounces per 

 animal per day, or a 0.1$ pyrethrin water-diluted spray, 1 to 2 quarts per animal three 

 times a week. Ciodrin, a newly approved material, as a 2.0$ oil or water spray at 

 1 to 2 ounces per animal daily or 1.0$ in water, 1 pint per animal per week, may be 

 worth trying. 



Under severe infestations, keep the animals in a barn during the day and 

 turn them out for grazing only in the evening. 



Caution : Before applying insecticides, read the labels carefully and 

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

 eliminate insecticide residue hazards. 



For a list of general precautions to use when handling and applying pesti- 

 cides, write to 280 Natural Resources Building, University of Illinois, Urbana, 

 Illinois, for "Safe Use of Pesticides." 



This weekly report was prepared by H. B. Petty and Steve Moore, Illinois 

 Natural History Survey and Illinois College of Agriculture , in cooperation with the 

 USDA Agricultural Service, Plant Pest Control Branch, from information gathered by 

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



H3P:SEW:dl 

 7/5/63 



