Consumption of spray by the automatic microspray applicator averaged about 2.4 milliliters (1/12 

 ounce) per animal per day. One gallon of spray concentrate gave 1,667 animal -days of protection. The 

 cost was approximately 1 cent per animal per day. 



CONTROL OF OTHER KINDS OF FLIES 



Methods that controlled horse flies on dairy cattle controlled horn flies and stable flies also. In 

 barns where cows were sprayed regularly for control of horse flies, house flies were unusually scarce. 

 On beef cattle, the automatic applicator controlled horn flies as well as horse flies; modifications might 

 be needed to control stable flies, which were not numerous enough on the test animals to require control. 



SUMMARY OF RECOMMENDATIONS 



Material: Pyrenone T-143 (1.0 per cent pyrethrins and 10.0 per cent piperonyl butoxide) or simi- 

 lar activated pyrethrins. 



For dairy cattle: (1) Undiluted material , 1/15 to 1/6 ounce per cow daily (about eight strokes of 

 small atomizing sprayer), 1/2 ounce per cow three times weekly, or 1 ounce per cow twice weekly; or (2) 

 material diluted with 9 parts water , 1/2 to 1/4 pint per cow two or three times weekly. 



For beef cattle: Undiluted material in automatic microspray applicator shown on pages 6 and 7. 

 Applicator regulated to deliver about 1/30 ounce per stroke. 



Cornelius 

 sprayer with 

 intake line 

 bent. 



T 



I 



i 



Z. & W. sprayer attached to garden -hose fitting soldered to gallon spray can. 



-8- 



Z. & W. sprayer. 



