_4- 



Apply a barn spray to the point of run-off on the ceilings and walls of all live- 

 stock buildings. Also spot-spray outside around windows and doors and along 

 fences in the lot. The following insecticides are suggested for this purpose: 



Insecticide 



Mount per 100 

 gallons of water 



diazinon, 50 -percent wettable powder. 



dimethoate (Cygon) , 23-percent liquid 

 concentrate 



fenthion (Baytex) , 45 -percent liquid. . . 



revap (Rabon plus dichlorvos) , liquid 

 concentrate ......... 



ronnel (Korlan) , 24-percent liquid 

 concentrate 



16 pounds 



4 pounds 



3 pounds 



4 gallons 

 4 gallons 



Length of 

 control 



2 to 4 weeks 



2 to 4 weeks 

 4 weeks 



4 to 6 weeks 



1 to 2 weeks 



Use only ronnel or fenthion in poultry houses. All materials are cleared for use 

 in dairy, beef, swine, sheep, and horse barns. Cover feed and water troughs be- 

 fore spraying. Do not spray animals with these materials at the dosages suggested 

 Remove animals before spraying the bams. Do not spray the milk storage room. 



Supplement good sanitation and barn sprays with a spray bait material . Use 2 to 

 4 ounces of dichlorvos (DDVP) or naled (Dibrom) in a mixture of 1 gallon 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) , pyre thrum, or naled 

 (Dibrom) give a quick kill of flies during the fogging operation (5 to 10 min- 

 utes) , 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, using space sprays applied 

 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 pres- 

 ent, 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 



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) , 57-percent liquid 

 concentrate 



2 gallons 



1 gallon 



Apply at 5 gallons of 

 finished spray per acre 



Same as above 



