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Horn flies and stable flies are abundant on cattle, and control programs 

 should begin immediately. Face flies have been slow to build up this year, but 

 populations are expected to increase throughout the remainder of the summer, par- 

 ticularly in the northern two-thirds of the state. 



To control flies on pastured dairy cattle, apply 1 to 2 ounces per ani- 

 mal of the oil form of 2.0$ ciodrin, 1.0$ DDVP or 0.1$ pyrethrin as needed. Pay 

 particular attention to the legs and undersides when spraying. 



For pastured beef cattle, apply a 0.5$ toxaphene waterbase spray at 1 to 

 2 quarts per animal every three weeks. Allow 28 days to elapse between treatment 

 with toxaphene and slaughter. 



House flies may soon become a nuisance now that most areas have had 

 some moisture. Follow these three steps: (l) Practice good sanitation; clean 

 out fly-breeding areas, such as manure, rotting straw, wet hay, and feed, as often 

 as is practical. (2) Apply a barn spray material, such as dimethoate (Cygon), 

 diazinon, or ronnel (Korlan) to runoff on ceilings and walls of all livestock 

 buildings except poultry houses. Use only ronnel in poultry houses. (3) Apply 

 a supplementary spray bait, using the same insecticide mixed with corn sirup and 

 water (2:1 ratio). Other insecticide baits may be used to good advantage as well. 



This program will not only control house flies, but will also reduce 

 stable flies. 



Picnic beetles continue to emerge and are a nuisance in many areas. 

 These beetles are about l/k inch long and are shiny black with four yellow spots 

 on their backs. They are attracted to the odor of food and get into food at pic- 

 nics and cookouts. They swarm onto overripe or injured fruits and vegetables in 

 gardens . 



Keep vegetables and berry patches free of overripe and rotting fruits 

 and vegetables. Reducing injury to fruits and vegetables from other insects will 

 help to reduce the number of picnic beetles. Sprays of malathion, diazinon or 

 carbaryl help to control them, but it may be necessary to repeat the applications 

 as beetles migrate into the area. Check application information on the label for 

 each crop on which you intend to use the insecticide. 



A 0.1$ pyrethrin spray can be used for quick knockdown of beetles at 

 picnics or cookouts. 



Caution : Before applying insecticides, read the labels carefully and 

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

 eliminate insecticide residue hazards. 



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

 pesticides, 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, Steve Moore and C. E. 

 White, Illinois Agricultural Extension Service and Illinois Natural History Sur- 

 vey, in cooperation -with the USBA Agricultural Research Service, Plant Pest Con- 

 trol Branch, from information gathered by entomologists and cooperators who send 

 in weekly reports from their own localities. 



NOT FOR PUBLICATION - Special Note to Farm Advisers : 



Salt, mineral supplements and other feeds containing either phenothia- 

 zine or ronnel are not recommended for controlling face flies or stable flies 

 even though they may give good control of horn flies. 



