12 BULLETIN 443, U. S. DEPARTMENT OF AGRICULTURE. 



Use of sheep and turkeys. — The pasturing of sheep might prove 

 effective in killing range caterpillars or pupse over small areas, but this 

 method would not be practical on the vast expanse of the cattle 

 ranges. Turkeys kept in confinement refused to eat the range cater- 

 pillar, and it therefore seems probable that they would not accept 

 them as food on the range. 



General considerations. — In any method for destroying the range 

 caterpillar, the low value of the range land must be taken into consid- 

 eration. This land sells for $5 or $10 per acre and rents at from 2 to 

 10 cents per acre. It will thus be seen that none of the foregoing 

 methods of artificial control are practical on range land. Thus the 

 introduction of natural enemies remains as probably the best solution 

 of the problem. 



Protection of cereal crops. — When this pest is found attacking 

 cultivated cereal crops, such as corn, sorghum, or kafir, it can be 

 controlled by spraying these crops with a solution of powdered 

 arsenate of lead, 1 pound to 50 gallons of water. But crops so 

 treated should not be pastured off or fed to stock until after heavy 

 rains have fallen, and at least 30 days should elapse between the 

 time of spraying and the use of such crops as forage. 



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