-3- 



Insecticide 



Amount per 100 

 gallons of water 



Length of 

 control 



*diazinon, 50-percent lettable powder . 

 dimethoate (Cygon) , 23-percent liquid 



concentrate 



fenthion (Baytex) , 45 -percent liquid . 

 Rabon, 50 -percent wettable powder. . . 

 Ravap, (Rabon plus dichlorvos), liquid 



concentrate 



ronnel (Korlan) , 24-percent liquid 



concentrate. ...... 



16 pounds 



4 pounds 



3 gallons 

 16 pounds 



4 gallons 

 4 gallons 



2 to 3 weeks 



3 to 4 weeks 



4 to 6 weeks 

 2 to 4 weeks 



2 to 4 weeks 



1 to 2 weeks 



*Do not use in dairy barns or milk rooms. 



Use only ronnel or Rabon in poultry houses. All materials other than diazinon 

 are cleared for use in dairy, beef, swine, sheep, and horse barns. Cover feed 

 and water troughs before spraying. Do not spray animal s with these materials at 

 the dosages suggested. Remove animals before spraying the barns. Do not spray 

 the milk- storage room. 



Supplement good sanitation and barn sprays with a spray bait material . Use 4 

 ounces of dichlorvos (DDVP) or 2 ounces of naled (Dibrom) in a mixture of 1 gal- 

 lon of clear corn syrup and 1/2 gallon of warm water. Apply this from a small 

 tank sprayer to the favorite fly-roosting areas. 



Barn foggers using insecticides like dichlorvos (DDVP) , pyrethrum, or naled (Di- 

 brom) give a quick kill of flies during the fogging operation (5 to 10 minutes) , 

 but the effect is not lasting. When fly populations become intense, even twice 

 a day fogging fails to provide satisfactory fly control for the farm- -even though 

 the barn is kept temporarily free of flies. As normally used, fogging does not 

 leave enough insecticide deposit on the animals to protect the cattle from flies 

 when on pasture. Coarse sprays applied to the animals are best for this purpose. 



For large drylot and enclosed confinement operations, the use of space sprays ap- 

 plied from a mist blower has been successful . During peak fly periods , treatments 

 will be needed every three or four days. The application can be made with cattle 

 present, but avoid direct application to exposed feed and water. Do not apply in 

 conjunction with animal or shelter treatments of organophosphate or carbamate in- 

 secticides. This should be the only chemical method of fly control being employed. 

 There is no need to spray cattle in dry lots. The following insecticides and rates 

 are suggested for mist blowers: 



Insecticide 



Amount per 100 

 gallons of water 



Method 



dichlorvos (Vapona) , 22-percent liquid 

 concentrate 



naled (Dibrom), 37 -percent liquid 

 concentrate 



2 gallons Apply at 5 gallons of 



finished spray per acre 



1 gallon Same as above 



